Fortinet FORTIOS MR7 User Manual

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USER GUIDE

FortiOS v3.0 MR7 SSL VPN User Guide

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FortiGate v3.0 MR7 SSL VPN User Guide

18 July 2008 01-30007-0348-20080718

© Copyright 2008 Fortinet, Inc. All rights reserved. No part of this publication including text, examples, diagrams or illustrations may be reproduced, transmitted, or translated in any form or by any means, electronic, mechanical, manual, optical or otherwise, for any purpose, without prior written permission of Fortinet, Inc.

Trademarks

ABACAS, APSecure, FortiASIC, FortiAnalyzer, FortiBIOS, FortiBridge, FortiClient, FortiGate, FortiGuard, FortiGuard-Antispam, FortiGuard-Antivirus, FortiGuard-Intrusion, FortiGuard-Web, FortiLog, FortiManager, Fortinet, FortiOS, FortiPartner, FortiProtect, FortiReporter, FortiResponse, FortiShield, FortiVoIP, and FortiWiFi are trademarks of Fortinet, Inc. in the United States and/or other countries. The names of actual companies and products mentioned herein may be the trademarks of their respective owners.

Contents

Introduction........................................................................................ 7

About FortiGate SSL VPN................................................................................. 7

About this document......................................................................................... 8

Document conventions.................................................................................. 8

Typographic conventions........................... ....................................... ...... 9

FortiGate documentation.................................................................................. 9

Related documentation................................................................................... 10

FortiManager documentation. ... .... ... ... ... .... ... ... ... ... ....... ... ... .... ... ... ... ... .... ... . 10

FortiClient documentation ........................................................................... 11

FortiMail documentation................... ... ... ....................................... .............. 11

FortiAnalyzer documentation ...................................................................... 11

Fortinet Tools and Documentation CD........................................................ 11

Fortinet Knowledge Center ........................................................................ 11

Comments on Fortinet technical documentation ................................ ........ 12

Customer service and technical support...................................................... 12

Configuring a FortiGate SSL VPN .................................................. 13

Comparison of SSL and IPSec VPN technology........................................... 13

Legacy versus web-enabled applications............................................. 14

Authentication differences .................................................................... 14

Connectivity considerations.................................................................. 14

Relative ease of use............................................................................. 14

Client software requirements................................................................ 14

Access control ...................................................................................... 14

Session failover support ....................................................................... 15

SSL VPN modes of operation......................................................................... 15

Web-only mode ............................... ... ... .... ... ... ... ... ..................................... 15

Web-only mode client requirements .................................................... 16

Port-forwarding mode.......... ... ... .... ...................................... ........................ 16

Client requirements............................................................................... 17

Tunnel mode .............................................................................................. 17

Tunnel-mode client requirements ........................................................ 18

Topology........................................................................................................... 18

Infrastructure requirements .......................... ............. .......... ............. .... 19

Configuration overview................................................................................... 20

Configuring the SSL VPN client..................................................................... 20

SSL VPN Virtual Desktop application. ........................................................ 21

Using the SSL VPN Virtual Desktop..................................................... 21

Using the SSL VPN standalone tunnel clients...................................... 24

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Contents

Configuring SSL VPN settings...... ... ... .... ... ... ... ... .... ... ... ....... ... ... ... ... .... ... ... ... . 36

Enabling SSL VPN connections and editing SSL VPN settings ................ 36

Specifying a port number for web portal connections ................................ 38

Specifying an IP address range for tunnel-mode clients ............................ 38

Enabling strong authentication through security certificates ...................... 39

Specifying the cipher suite for SSL negotiations ........................................ 39

Setting the idle timeout setting ................................................................... 40

Setting the client authentication timeout setting ......................................... 40

Adding a custom caption to the web portal home page ............... .... ... ... ... . 40

Adding WINS and DNS services for clients ................................................ 40

Redirecting a user group to a popup window ............................................. 40

Customizing the web portal login page ...................................................... 41

Configuring user accounts and SSL VPN user groups............................... 42

Configuring firewall policies .......................................................................... 45

Configuring firewall addresses ............................................................ 46

Configuring Web-only firewall policies.................................................. 46

Configuring pass through for port-forwarding mode............................. 48

Configuring tunnel-mode firewall policies ..................... ....................... 48

Configuring SSL VPN event-logging ..................... ...... ... .... ... ... ... ... .... ... ... ... . 50

Monitoring active SSL VPN sessions ........................................................... 51

Configuring SSL VPN bookmarks and bookmark groups........................... 52

Viewing the SSL VPN bookmark list........................................................... 52

Configuring SSL VPN bookmarks............................................................... 53

Viewing the SSL VPN Bookmark Groups list.............................................. 54

Configuring SSL VPN bookmark groups..................................................... 54

Assigning SSL VPN bookmark groups to SSL VPN users ......................... 55

SSL VPN host OS patch check....................................................................... 56

Configuration Example......................................................................... 56

Granting unique access permissions for SSL VPN tunnel user groups.... 57

Sample configuration for unique access permissions with tunnel mode user

groups......................................................................................................... 58

SSL VPN virtual interface (ssl.root)............................................................... 62

SSL VPN dropping connections .................................................................... 64

Working with the web portal........................................................... 65

Connecting to the FortiGate unit .................................................................. 65

Web portal home page features .................................................................... 66

Launching web portal applications .............................................................. 68

URL re-writing....................................................................................... 68

Adding a bookmark to the My Bookmarks list ............................................ 69

Starting a session from the Tools area ........................................................ 80

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Contents

Tunnel-mode features .................................................................................... 80

Working with the ActiveX/Java Platform plug-in .............. .......................... . 81

Uninstalling the ActiveX/Java Platform plugin .............................. .............. 83

Logging out ..................................................................................................... 83

Index.................................................................................................. 85

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Contents

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Introduction About FortiGate SSL VPN

Introduction

This section introduces you to FortiGate™ Secure Sockets Layer (SSL) VPN technology and provides supplementary information about Fort inet™ publications.

The following topics are included in this section:

• About FortiGate SSL VPN

• About this document

• FortiGate documentation

• Related documentation

• Customer service and technical support

About FortiGate SSL VPN

FortiGate SSL VPN technology makes it safe to do business over the Internet. In addition to encrypting and securing information sent from a web browse r to a web server, FortiGate SSL VPN can be used to encrypt most Internet-based traffic.

With the FortiGate unit’s built-in SSL VPN capabilities, small home offices, medium-sized businesses, enterprises, and service providers can ensure the confidentiality and integrity of data transmitted over the Internet. The FortiGate unit provides enhanced authentication and restricted access to company network resources and services.

The two modes of SSL VPN operation, supported in NAT/Route mode only, are:

• web-only mode, for thin remote clients equipped with a web browser only

• tunnel mode, for remote computers that run a variety of client and server applications

When the FortiGate unit provides services in web -on l y mode , a secure web connection between the remote client and the FortiGate unit is established using the SSL VPN security in the FortiGate unit and the SSL security in the web browser. After the connection has been established, the FortiGate unit provides access to selected services and network resources through a web portal.

Where users have complete administrative rights over their computers and use a variety of applications, tunnel mode allows remote clients to access the local internal network as if they were connected to the network directly. In tunnel mode, a secure SSL connection is established initially for the FortiGate unit to download SSL VPN client software (an ActiveX plugin) to the web browser. After the user installs the SSL VPN client software, they can initiate a VPN tunnel with the FortiGate unit whenever the SSL connection is open.

When the SSL VPN feature is used, all client traffic is encrypted and sent to the SSL VPN. This includes both traffic intended for the private network and Internet traffic that is normally sent unencrypted. Split tunneling ensures that only the traffic for the private network is sent to the SSL VPN gateway. Internet traffic is sent through the usual unencrypted route. This conserves ban dwith and alleviates bottlenecks. The split tunneling feature is not enabled by default.

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About this document Introduction

Whether to use web-only or tunnel mode depends on the number and type of applications installed on the remote computer. Access to any application not supported through web-only mode can be supported through tunnel mode. For more information about these modes of operation, see “Configuring a FortiGate

SSL VPN” on page 13.

About this document

This document explains how to configure SSL VPN operation using the webbased manager and contains the following chapters:

• Configuring a FortiGate SSL VPN describes the two modes of operation, recommends a deployment topology, and provides an overview of the associated infrastructure dependencies. The high-level steps for configuring each mode of operation are also included with cross-references to underlying procedures. This chapter also details the basic administrative tasks needed to support the two modes of operation, and describes the additional step -by- step procedures needed to configure each mode.

• Working with the web portal introduces the web portal applications and explains how to work with them. The chapter also explains how to install the ActiveX plugin and initiate a VPN tunnel when tunnel mode is enabled.

Document conventions

The following document conventions are used in this guide:

• In the examples, private IP addresses are used for both private and public IP addresses.

• Notes and Cautions are used to provide important information:

Note: Highlights useful additional information.

Caution: Warns you about commands or procedures that could have unexpected or

undesirable results including loss of data or damage to equipment.

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Introduction FortiGate documentation

Typographic conventions

FortiGate documentation uses the following typographical conventions:

Convention Example Keyboard input

Code examples config sys global

CLI command syntax config firewall policy

Document names File content <HTML><HEAD><TITLE>Firewall

Menu commands Go to VPN > SSL > Config. Program output Welcome! Variables <group_name>

In the Name field, type admin.

set ips-open enable

end

edit id_integer

set http_retry_count <retry_integer> set natip <address_ipv4mask>

end

FortiGate SSL VPN User Guide

Authentication</TITLE></HEAD> <BODY><H4>You must authenticate to use this service.</H4>

FortiGate documentation

The most up-to-date publications and previous releases of Fortinet product documentation are available from the Fortinet Technical Documentation web site at http://docs.forticare.com.

The following FortiGate product documentation is available:

• FortiGate QuickStart Guide

Provides basic information about connecting and installing a FortiGate unit.

• FortiGate Installation Guide

Describes how to install a FortiGate unit. Includes a hardware reference, default configuration information, installation procedures, connection procedures, and basic configuration procedures. Choose the guide for your product model number.

• FortiGate Administration Guide

Provides basic information about how to configure a FortiGate unit, including how to define FortiGate protection profiles and firewall policies; how to apply intrusion prevention, antivirus protec tion , we b c onte n t filter ing , an d spam filtering; and how to configure a VPN.

• FortiGate online help Provides a context-sensitive and searchable version of the Administration

Guide in HTML format. You can access online help from the web-based

manager as you work.

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Customer service and technical support

Fortinet Technical Support provides services designed to make sure that your Fortinet systems install quickly, configure easily, and operate reliably in your network.

Please visit the Fortinet Technical Support web site at http://support.fortinet.com to learn about the technical support services that Fortinet provides.

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Configuring a FortiGate SSL VPN Comparison of SSL and IPSec VPN technology

Configuring a FortiGate SSL VPN

This section provides a comparison of SSL and IPSec VPN technology, in addition to an overview of the two modes of SSL VPN operation. The high-level steps for configuring each mode are also included with cross-references to underlying procedures.

The following topics are included in this section:

• Comparison of SSL and IPSec VPN technology

• SSL VPN modes of operation

• Topology

• Configuration overview

• Configuring SSL VPN settings

• Configuring user accounts and SSL VPN user groups

• Configuring firewall policies

• Configuring SSL VPN event-logging

• Monitoring active SSL VPN sessions

• Configuring SSL VPN bookmarks and bookmark groups

• SSL VPN host OS patch check

• Granting unique access permissions for SSL VPN tunnel user groups

• SSL VPN virtual interface (ssl.root)

• SSL VPN dropping connections

Comparison of SSL and IPSec VPN technology

The FortiGate unit supports both SSL and IPSec VPN technologies. Each combines encryption and VPN gateway functions to create private comm unication channels over the Internet, which helps to defray physical network costs. Both enable you to define and deploy network access and firewall policies using a single management tool. In addition, both support a simple client/user authentication process (including optional X.509 security certificates). You have the freedom to use both technologies; however, one may be better suited to the requirements of your situation.

In general, IPSec VPNs are a good choice for site-to-site connections where appliance-based firewalls are used to provide network protection, and company sanctioned client computers are issued to users. SSL VPNs are a good ch oice for roaming users who depend on a wide variety of thin-client computers to access enterprise applications and/or company resources from a remote location.

SSL and IPSec VPN tunnels may operate simultaneously on the same FortiGate unit.

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Comparison of SSL and IPSec VPN technology Configuring a FortiGate SSL VPN

Legacy versus web-enabled applications

IPSec is well suited to network-based legacy applications tha t are not web-base d. As a layer 3 technology, IPSec creates a secure tunnel between two host devices. IP packets are encapsulated by the VPN clie nt and server softwar e running on the hosts.

SSL is typically used for secure web transactions in order to take advantage of web-enabled IP applications. After a secure HTTP link has been established between the web browser and web server, application data is transmitted directly between selected client and server applications through the tunnel.

Authentication differences

IPSec is a well-established technology with robust features that support many legacy products such as smart cards and biometrics.

SSL supports sign-on to a web portal front-end, from which a number of different enterprise applications may be accessed. The Fortinet implementation enables you to assign a specific port for the web portal and to customize the login page if desired.

Connectivity considerations

IPSec supports multiple connections to the same VPN tunnel—a number of remote VPN devices effectively become part of the same network.

SSL forms a connection between two end points such as a remote client and an enterprise network. Transactions involving three (or more) parties are not supported because traffic passes between client and server applications only.

Relative ease of use

Although managing IPSec VPNs has become easier, configuring SSL VPNs is simple in comparison. IPSec protocols may be blocked or restricted by some companies, hotels, and other public places, whereas the SSL protocol is usually unrestricted.

Client software requirements

Dedicated IPSec VPN software must be installed on all IPSec VPN peers and clients and the software has to be configured with compatible settings.

To access server-side applications with SSL VPN, the remote user must have a web browser (Internet Explorer, Netscape, or Mozilla/Firefox), and if Telnet//RDP are used, Sun Java runtime environment. Tunnel-mode clie nt computers must also have ActiveX (IE) or Java Platform (Mozilla/Firefox) enabled.

Access control

IPSec VPNs provide secure network access only. Access to the network resources on a corporate IPSec VPN can be enabled for specific IPSec peers and/or clients. The amount of security that can be applied to users is limited.

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Configuring a FortiGate SSL VPN SSL VPN modes of operation

SSL VPNs provide secure access to certain applications. Web-only mode provides remote users with access to server applications from any thin client computer equipped with a web browser. Tunnel-mode provides remote users with the ability to connect to the internal network from laptop computers as well as airport kiosks, Internet cafes, and hote ls. Access to SSL VPN applications is controlled through user groups.

Session failover support

In a FortiGate high availability (HA) cluster with session pickup enabled, session failover is supported for IPSec VPN tunnels. After an HA failover, IPSec VPN tunnel sessions will continue with no loss of data.

Session failover is not supported by SSL VPN tunnels, however cookie failover is supported for communication between the SSL VPN client and the FortiGate unit. This means that after a failover, the SSL VPN client can re-establish the SSL VPN session without having to authenticate again. However, all sessions inside the SSL VPN tunnel with resources behind the FortiGate unit will stop, and will therefore have to be restarted.

SSL VPN modes of operation

When a remote client connects to the FortiGate unit, the FortiGate unit authenticates the user based on user name, password, and authentication domain. A successful login determines the access rights of remote users according to user group. The user group settings specify whether the connection will operate in web-only mode (see “Web-only mode” on page 15) or tunnel mode (see “Tunnel mode” on page 17).

You can enable a client integrity checker to scan the remote client. The integrity checker probes the remote client computer to verify that it is “safe” before access is granted. Security attributes recorded on the client computer (for example, in the Windows registry, in specific files, or held in memory due to running processes) are examined and uploaded to the FortiGate unit.

You can enable a cache cleaner to remove any sensitive data that would otherwise remain on the remote computer after the session e nds. For example, all cache entries, browser history, cookies, encrypted information related to user authentication, and any temporary data generated during the session are removed from the remote computer. If the client’s browser cannot install and run the cache cleaner, the user is not allowed to access the SSL-VPN portal.

Web-only mode

Web-only mode provides remote users with a fast and efficient way to access server applications from any thin client computer equipped with a web browser. Web-only mode offers true clientless network access using any web browser that has built-in SSL encryption and the Sun Java runtime envi ro nm ent .

Support for SSL VPN web-only mode is built into the FortiOS operating system. The feature comprises an SSL daemon running on the FortiGate unit, and a web portal, which provides users with access to network ser vice s an d reso ur ce s including HTTP/HTTPS, telnet, FTP, SMB/CIFS, VNC, RDP and SSH.

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SSL VPN modes of operation Configuring a FortiGate SSL VPN

In web-only mode, the FortiGate unit act s as a se cure HTTP/HT TPS gateway and authenticates remote users as members of a user group. After successful authentication, the FortiGate unit redirects the web browser to the web portal home page and the user can access the server applications behind the FortiGate unit.

Configuring the FortiGate unit involves selecting web-only-mode access in the user group settings and enabling the feature through SSL VPN configuration settings. The user group settings determine which server applications can be accessed. SSL encryption is used to ensure traffic confidentiality.

Web-only mode client requirements

The remote client computer must be equipped with the following softwa re:

• Microsoft Windows 2000/XP/2003/Vista, Linux, MacOS X, or UNIX operating system

• Microsoft Internet Explorer 6.0 (or later), Netscape Navigator 7.0 (or later), Mozilla Foundation/Firefox 1.5 (or later), or Apple Safari 1.3 (or later)

• If Telnet/ or RDP are us ed , Sun Java run tim e env iro nm e nt 1.4 (o r lat er ), with Java applet access, JavaScript acces s, an d en a ble d co ok ie acc ep tance

Tunnel mode

Note: Web browsers offer different SSL security capabilities. The FortiGate unit offers an

SSL version 2 option through the CLI if required to support older browsers. In addition, the FortiGate unit supports a range of cipher suites for negotiating SSL communications with a variety of web browsers. The web browser must at least support a 64-bit cipher length.

Tunnel mode offers remote users the freedom to connect to the internal network using the traditional means of web-based access from laptop computers, as well as from airport kiosks, hotel business centers, and Internet cafés. If the applications on the client computers used by your user community vary greatly, you can deploy a dedicated SSL VPN client to any remote client through its web browser. The SSL VPN client encrypts all traffic from the remote client computer and sends it to the FortiGate unit through an SSL VPN tunnel over the HTTPS link between the web browser and the FortiGate unit. Also available is split tunneling, which ensures that only the traffic for the private network is sent to the SSL VPN gateway. Internet traffic is sent through the usual unencrypted route. This conserves bandwith and alleviates bottlenecks.

In tunnel mode, remote clients connect to FortiGate unit and the web portal login page using Microsoft Internet Explorer, Mozilla Foundation/Firefox, MacOS, or Linux. The FortiGate unit acts as a secure HTTP/HTTPS gateway and authenticates remote users as members of a user group. After successful authentication, the FortiGate unit redirects the web browser to the web portal home page. The user can then download the SSL VPN client (an ActiveX or Java plugin) and install it using controls provided through the web portal. SSL VPN tunnel mode can also be initiated from a standalone application on Windows/MacOS, and Unix.

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Configuring a FortiGate SSL VPN Topology

When the user initiates a VPN connection with the FortiGate unit throu gh the SSL VPN client, the FortiGate unit establishes a tunnel with the client and assigns the client a virtual IP address from a range of rese rved addresses. The clie nt uses the assigned IP address as its source address for the duration of the connection. Af ter the tunnel has been established, the user can access the network behind the FortiGate unit.

Configuring the FortiGate unit to establish a tunnel with remote clients involves selecting tunnel-mode access in the user group settings and enabling the feature through SSL VPN configuration settings. The firewall policy and pr otection profiles on the FortiGate unit ensure that inbound traffic is screened and processed securely.

Tunnel-mode client requirements

The remote computer must be equipped with the following software:

• Microsoft Windows 2000/XP/2003 or Vista (32 or 64-bit), MacOS X v10.3.9, v10.4 “Tiger”, v10.5 “Leopard”, or Linux Distributions RedHat/Fedora, Ubuntu/Debian, or Suse

• Microsoft Internet Explorer 6.0 (or later) with ActiveX enabled, or Mozilla Foundation/Firefox (1.5 or later) with Java Platform enabled

Topology

Note: The browser requirements only apply if you use the tunnel mode client on Windows

through the browser interface. You do not need a browser if you use the standalone tunnel client.

Note: The user account used to install the SSL VPN client on the remote computer must have administrator privileges.

In the most common Internet scenario, the remote client connects to an ISP that offers connections with dynamically assigned IP addresses. The ISP forwards packets from the remote client to the Internet, where they are routed to the public interface of the FortiGate unit.

At the FortiGate unit, you configure user groups and firewall policies to define the server applications and IP address range or network that remote clients will be able to access behind the FortiGate unit.

For example, Figure 1 shows a FortiGate gateway (FortiGate_1) to two private networks, Subnet_1 and Subnet_2.

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Topology Configuring a FortiGate SSL VPN

Subnet_2

192.168.22.0/24

internal

192.168.22.1

Subnet_1

172.16.10.0/24

HTTP/HTTPS

172.16.10.2

Tel net

172.16.10.3

FTP

172.16.10.4

SMB/CIFS

172.16.10.5

Internet

FortiGate_1

wan1

dmz

172.16.10.1

Remote client

Figure 1: Example SSL VPN configuration

To provide remote clients with access to all of the servers on Subnet_1 from the Internet, you would configure FortiGate_1 as follows:

• Create an SSL VPN user group and include the remote users in the user group. When you create the user group, you also specify whether the users may access the web portal in web-only mode or tunnel mode.

• For tunnel-mode users, define the virtua l IP add re sse s th at the Fo rtiGa te un i t is to assign to remote clients when they connect.

• Create a firewall destination IP address of 172.16.10.0/24.

• Create a firewall policy to allow the SSL VPN user group members to connect to Subnet_1 through the VPN. For more information, see “Configuring firewall

policies” on page 45.

If your user community needs access to Subnet_2, you would create a second firewall destination IP address of 192.168.22.0/24 and create a second firewall policy that binds the associated remote clients to the Subnet_2 destination address.

Infrastructure requirements

• The FortiGate unit must be operating in NAT/Route mode and have a static public IP address.

• The ISP assigns IP addresses to remote clients before they connect to the FortiGate unit.

• If the remote clients need web-only mode access, see “Web-only mode client

requirements” on page 16.

• If the remote clients need tunnel-mode access, see “Tunnel-mode client

requirements” on page 18.

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Configuring a FortiGate SSL VPN Configuration overview

Configuration overview

Before you begin, install your choice of HTTP/HTTPS, telnet, SSH, FTP, SMB/CIFS, VNC, and/or RDP server applications on the internal network. As an alternative, these services may be accessed remotely through the Internet. All services must be running. Users must have individual user accounts to access the servers (these user accounts are not related to FortiGate user accounts or FortiGate user groups).

To configure FortiGate SSL VPN technology, you should follow these genera l steps:

1 Enable SSL VPN connections and set the basic options needed to support SSL

VPN configurations. See “Configuring SSL VPN settings” on page 36.

2 To use X.509 security certificates for authentication purposes, load the signed

server certificate, CA root certificate, and Certificate Revocation List (CRL) onto the FortiGate unit, and load the personal/group certificates onto the remote clients. For more information, see the FortiGate Certificate Management User

Guide.

3 Create one FortiGate user account for each remote client, a nd assign the users to

SSL VPN type user groups. See “Configuring user accounts and SSL VPN user

groups” on page 42.

4 Configure the firewall policy and the remaining para meter s nee de d to suppor t th e

required mode of operation:

• For web-only mode operation, see “Configuring Web-only firewall policies” on

page 46.

• For tunnel-mode operation, see “Configuring tunnel-mode firewall policies” on

page 48.

5 Define SSL VPN event-logging parameters. See “Configuring SSL VPN event-

logging” on page 50.

6 You can also monitor active SSL VPN sessions. See “Monitoring active SSL VPN

sessions” on page 51.

Configuring the SSL VPN client

There are several configurations of SSL VPN applications available. The SSL VPN tunnel client application installs a network driver on the client machine that redirects all network traffic through the SSL VPN tunnel (it is necessary for the driver to be OS-specific).

SSL VPN web-mode works on all OSs and browsers. The tunnel mode client can be downloaded and installed from the browser interface on Windows platforms through ActiveX for IE, or Firefox plug-ins. If you prefer not to initiate the tunnel mode client function using a browser, standalone SSL VPN tunnel client applications are available for Windows, Linux, and MacOS (see Tunnel-mode

client requirements for the specific versions that are supported). When a system

configuration must involve more secure disposal of cached data, the SSL VPN Virtual Desktop should be used. (Windows XP only).

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Configuring the SSL VPN client Configuring a FortiGate SSL VPN

SSL VPN Virtual Desktop application.

The virtual desktop application creates a virtual desktop on a user's PC and monitors the data read/write activity of the web browser running inside the virtual desktop. When the application starts, it presents a ‘virtual desktop’ to the user. The user starts the web browser from within the virtual desktop and connects to the ssl vpn web portal. The browser file/directory operation is redirected to a new location, and the data is encrypted before it is written to the local disk. When the virtual desktop application exits normally, all the data written to the disk is removed. If the session terminates abnormally (power loss, system failure), the data left behind is encrypted and unusable to the user. The next time you start the virtual desktop, the encrypted data is removed.

Using the SSL VPN Virtual Desktop

On the FortiGate unit GUI under SSL VPN User Group Options, the 'Require Virtual Desktop Connection' option is not selected by default. If you choose to use the SSL VPN virtual desktop option, users are forced to use the virtual desktop to initiate a SSL VPN session. The user must install the FortiClient SSL VPN virtual desktop application on the client machine and run it. If a user attempt s to establish a VPN connection that does not use the virtual desktop, the connection is refu sed.

The most recent version of the SSL VPN virtual desktop application can be found at:

http://support.fortinet.com/

Windows XP is supported in the current release.

To download and run the SSL VPN Virtual Desktop application

1 Go to the Fortinet Technologies home page at http://support.fortinet.com/

select Support.

2 Under Support, enter your user name and password.

This takes you to the Fortinet customer support site.

3 Select Firmware Images and then FortiGate.

and

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Configuring a FortiGate SSL VPN Configuring the SSL VPN client

The FortiGate index page opens.

4 Select v3.0 and then MR7.

This takes you to the page with firmware images for MR7.

5 Select SSL VPN Clients.

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Configuring the SSL VPN client Configuring a FortiGate SSL VPN

6 To download the SSL VPN Virtual Desktop, select

SSLVPNVirtualDesktopSetup_3.0.384.exe and follow the InstallShield Wizard instructions.

Figure 2: FortiClient SSL VPN InstallShield Wizard welcome screen

7 To run the SSL VPN Virtual Desktop application, select Start > All Programs >

FortiNet > SSL VPN Virtual Desktop > SSL VPN Virtual Desktop.

The FortiGate unit may offer you a self-signed security certificate. If you are prompted to proceed, select Yes.

8 When you are prompted for your user name and password:

• In the Name field, type your user name.

• In the Password field, type your password.

9 Select Login.

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Configuring a FortiGate SSL VPN Configuring the SSL VPN client

The FortiGate unit will redirect your web browser to the FortiGate SSL VPN Remote Access Web Portal home p age automatically.

The fields in the Tools area enable you to specify the URL or IP address of a host computer. If required, you can ping a host computer behind the FortiGate unit to verify connectivity to that host.

To connect to a web server from the Tools area

1 In the Connect to Web Server field, type the URL of the web server (for example,

http://www.mywebexample.com or https://172.20.120.101).

2 Select Go.

The FortiGate unit replaces the URL with https://<FG_IP_address>:<port_no>/proxy/http/<specified_URL> and the requested page is displayed.

3 To end the session, close the browser window.

To ping a host or server behind the FortiGate unit

1 In the Test for Reachability (Ping) field, type the IP address of the host or server

that you want to reach (for example, 192.168.12.22).

2 Select Go.

A message stating whether the IP address can be reached or not is disp layed.

Using the SSL VPN standalone tunnel clients

SSL VPN standalone tunnel client applications are available for Windows, Linux, and MacOS systems (see Tunnel-mode client requirements for the specific versions that are supported). There are separate download files for each operating system.

The most recent version of the SSL VPN standalone client applications can be found at:

http://support.fortinet.com/

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Configuring the SSL VPN client Configuring a FortiGate SSL VPN

To download the SSL VPN standalone tunnel client (Windows)

1 Go to the Fortinet Technologies home page at http://support.fortinet.com/

select Support.

2 Under Support, enter your user name and password.

This takes you to the Fortinet customer support site.

3 Select Firmware Images and then FortiGate.

Figure 3: Firmware Images selection on Fortinet customer support site

The FortiGate index page opens.

and

Figure 4: FortiGate index page

4 Select v3.0 and then MR7.

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Configuring a FortiGate SSL VPN Configuring the SSL VPN client

This takes you to the page with firmware images for MR7.

5 Select SSL VPN Clients.

6 To download the SSL VPN Windows client application, select

FortiClientSSLVPNSetup_3.0.384.exe or FortiClientSSLVPN_3.0_384.msi and follow the InstallShield Wizard

instructions.

FortiOS v3.0 MR7 SSL VPN User Guide 01-30007-0348-20080718 25

Configuring the SSL VPN client Configuring a FortiGate SSL VPN

To use the SSL VPN standalone tunnel client (Windows)

1 Go to Start > All Programs > Fortinet > FortiClient SSL VPN >

FortiClient SSL VPN.

Server Address Enter the IP address of the server you need to access. Username Enter your user name. Password Enter the password associated with your user account. Expand button Select to expand the dialog box and display Client Certificate,

Client Certificate Select the authentication certificate from the drop-down list, if

Save user name and password

Keep connection alive until manually stopped

Save user name and password, and Keep connection alive until manually stopped.

required. Select to save the value in Username and Password for future

logins. Select to have the connection stay up until you log out.

2 Select Connect. 3 To manually terminate the connection, select Exit.

To uninstall the SSL VPN standalone tunnel client (Windows)

1 Go to Start > Control Panel. 2 Select Add or Remove Programs. 3 Select ‘FortiClient SSL VPN’ and then Remove.

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Configuring a FortiGate SSL VPN Configuring the SSL VPN client

To download the SSL VPN standalone tunnel client (Linux)

1 Go to the Fortinet Technologies home page at http://support.fortinet.com/

and

select Support.

2 Under Support, enter your user name and password.

This takes you to the Fortinet customer support site.

3 Select Firmware Images and then FortiGate.

The FortiGate index page opens.

4 Select v3.0 and then MR7.

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Configuring the SSL VPN client Configuring a FortiGate SSL VPN

This takes you to the page with firmware images for MR7.

5 Select SSL VPN Clients.

6 To download the SSL VPN standalone tunnel client (Linux), select

forticlientsslvpn_linux_3.0.384.tar.gz, extract the package file to a folder and run the client program ‘forticlientsslvpn’.

When you run the install program for the first time,

parameters (root privileges) before you run the program or before other users without administrator privileges can use the application.

you will have to set up system

7 In the First Run dialog, select OK.

The command line terminal window opens.

8 Type your password and select Enter.

The License Agreement dialog appears in the command line terminal window.

9 Accept the License Agreement, and select Enter.

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Configuring a FortiGate SSL VPN Configuring the SSL VPN client

The FortiClient SSL VPN tunnel client (Linux) opens.

After this initial setup is complete, a user with a normal (non-administrator) account can establish a SSL VPN tunnel session.

FortiOS v3.0 MR7 SSL VPN User Guide 01-30007-0348-20080718 29

Configuring the SSL VPN client Configuring a FortiGate SSL VPN

To use the SSL VPN standalone tunnel client (Linux)

1 Go to the folder that you downloaded the Linux tunnel client application into, and

double-click on ‘forticlientsslvpn’.

The FortiClient SSL VPN tunnel client (Linux) opens.

Server Enter the IP address of the server you need to access. User Enter your user name. Password Enter the password associated with your user account. Advanced settings Save user name

and password Keep connection

alive until manually stopped

Select to save the value in User and Password for future logins.

Select to have the connection stay up until you log out.

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Configuring a FortiGate SSL VPN Configuring the SSL VPN client

Use Client Certificate (A PKCS #12 File)

Use Proxy Select to make it necessar y for th e user to utilize a proxy server. Proxy Enter the IP address of the proxy server and the port identifier. User Enter the user name of the client using the proxy server. Password Enter the user password for the client to access the proxy server. Connect Initiate the SSL VPN tunnel connection.

File Path Enter the path to the certificate file, or browse

to the location of the file.

File Password Enter the password associated with the

certificate file.

To uninstall the SSL VPN standalone tunnel client (Linux)

Remove/delete the folder containing all the SSL VPN client application files.

To download the SSL VPN standalone tunnel client (MacOS)

1 Go to the Fortinet Technologies home page at http://support.fortinet.com/

select Support.

2 Under Support, enter your user name and password.

and

This takes you to the Fortinet customer support site.

3 Select Firmware Images and then FortiGate.

The FortiGate index page opens.

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Configuring the SSL VPN client Configuring a FortiGate SSL VPN

4 Select v3.0 and then MR7.

This takes you to the page with firmware images for MR7.

5 Select SSL VPN Clients.

6 To download the SSL VPN MacOS client application, double-click on the client file

forticlientsslvpn_macosx_3.0.384.dmg. The Mac mounts the disk image as ‘forticlientsslvpn’.

7 Double-click the forticlientsslvpn.pkg file inside the disk image and follow the

instructions. The application installs the program ‘forticlientsslvpn’ in the Applications

folder

8 Unmount the disk image by selecting the disk image file

‘forticlientsslvpn_macos_3.0.nnn.dmg’ and dragging it into the Trash (nnn refers to the build number).

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Configuring a FortiGate SSL VPN Configuring the SSL VPN client

To use the SSL VPN standalone tunnel client (MacOS)

1 Go to the Applications folder and double-click on forticlientsslvpn.

The FortiClient SSL VPN tunnel client (MacOS) opens.

To uninstall the SSL VPN standalone tunnel client (MacOS)

2 In the Applications folder, select ‘forticlientsslvpn’ and drag it into the

Trash. After you empty the Trash folder, the installed program is removed from the user

computer.

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Configuring SSL VPN settings Configuring a FortiGate SSL VPN

Configuring SSL VPN settings

You can configure and manage the FortiGate unit through a secure HTTP (HTTPS) connection from any computer running a web browser. For information about how to connect to the web-based manager, see “Connecting to the webbased manager” in the FortiGate Installation Guide.

Note: As an alternative, you can connect the management computer to the Console connector of the FortiGate unit directly using a serial cable and configure the FortiGate unit through the Command Line Interface (CLI). The CLI can also be launched from within the web-based manager. For more information, see “Connecting to the FortiGate console” in the FortiGate CLI Reference.

Refer to the FortiGate Installation Guide and FortiGate Administration Guide to change the password, configure the interfaces of the FortiGate unit, and assign basic operating parameters, including a default gateway.

There are basic administrative tasks common to all modes of operation that must be completed first, regardless of the connec tio n mo d e you sele ct.

The VPN > SSL > Config page contains basic SSL VPN settings including idletimeout values and SSL encryption preferences for compatibility with various web browsers. You may also optionally enable authentication through X.509 security certificates (for more information about security certificates, see the FortiGate

Certificate Management User Guide).

In addition to setting these preferences on the VPN > SSL > Config page, you may choose to modify the following system settings:

• The FortiGate unit redirects web browsers to the web portal home page after the remote client has been authenticated and the user has logged in successfully. As an option, you can display a second HTML page in a popup window for all members of a user group. For more information, see

“Redirecting a user group to a popup window” on page 40.

• You can customize the look of the web portal login page through replacement messages. For more information, see “Customizing the web portal login page”

on page 41.

Enabling SSL VPN connections and editing SSL VPN settings

To enable SSL VPN connections and configure or edit SSL VPN settings, go to VPN > SSL > Config and select Enable SSL-VPN. The FortiGate unit does not accept web-only mode or tunnel-mode connections while SSL VPN operation is disabled.

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Configuring a FortiGate SSL VPN Configuring SSL VPN settings

Figure 5: Edit SSL VPN settings

Enable SSL VPN Select to enable SSL VPN connections. T un nel IP Range Specify the range of IP addresses reserved for tunnel-

Server Certificate Select the signed server certificate to use for

Require Client Certificate If you want to enable the use of group certificates for

Encryption Key Algorithm

See Specifying the cipher suite

for SSL negotiations.

Default - RC4(128 bits) and higher

High - AES(128/256 bits) and 3DES

Low - RC4(64 bits), DES and higher

mode SSL VPN clients. Type the starting and ending address that defines the range of reserved IP addresses. See Specifying an IP address range for

tunnel-mode clients.

authentication purposes. If you leave the default setting (Self-Signed), the FortiGate unit offers its factory installed (self-signed) certificate from Fortinet to remote clients when they connect. See Enabling strong

authentication through security certificates.

authenticating remote clients, select the option. Afterward, when the remote client initiates a connection, the FortiGate unit prompts the client for its client-side certificate as part of the authentication process.

Select the algorithm for creating a secure SSL connection between the remote client web browser and the FortiGate unit.

If the web browser on the remote client is capable of matching a 128-bit or greater cipher suite, select this option.

If the web browser on the remote client is capable of matching a high level of SSL encryption, select this option to enable cipher suites that use more than 128 bits to encrypt data.

If you are not sure which level of SSL encryption the remote client web browser supports, select this option to enable a 64-bit or greater cipher suite.

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Configuring SSL VPN settings Configuring a FortiGate SSL VPN

Idle Timeout Type the period of time (in seconds) to control how long

Portal Message If you want to display a custom caption at the top of the

Advanced (DNS and WINS Servers) See Adding WINS and DNS services for clients. DNS Server #1

DNS Server #2 WINS Server #1

WINS Server #2

the connection can remain idle before the system forces the user to log in again. The range is from 10 to 28800 seconds. This setting applies to the SSL VPN session. The interface does not time out when web application sessions or tunnels are up. See Setting the idle timeout

setting.

web portal home page, type the message. See Adding a

custom caption to the web portal home page.

Enter up to two DNS Servers to be provided for the use of clients.

Enter up to two WINS Servers to be provided for the use of clients.

When you finish making your selections, select Apply.

Note: The Tunnel IP Range fields are used to configure tunnel-mode access only. If you are configuring web-only mode operation, leave 0.0.0.0 values in the Tunnel IP Range fields. If you are configuring tunnel-mode operation, see “Specifying an IP address range

for tunnel-mode clients” on page 38. For informa tion about enabling certificate-based

authentication through the Server Certificate and Require Client Certificate options, refer to the FortiGate Certificate Management User Guide.

Specifying a port number for web portal connections

You can optionally specify a different TCP port number for users to access the web portal login page through the HTTPS link. By default, the port number is 10443 and users can access the web portal log in page using the following default URL:

https://<FortiGate_IP_address>:10443/remote where <FortiGate_IP_address> is the IP address of the FortiGate interface that

accepts connections from remote users.

Note: Do not select port number 443 for user access to the web portal login page. Port number 443 is reserved to support administrative connections to the FortiGate unit through the web-based manager.

1 Go to System > Admin > Settings. 2 In the SSLVPN Login Port field, type an unused port number. 3 Select Apply.

Specifying an IP address range for tunnel-mode clients

The Tunnel IP Range fields on the VPN > SSL > Config page enable you to reserve a range of IP addresses for remote SSL VPN clients. After the FortiGate unit authenticates a request for a tunnel-mode connection, the SSL VPN client connects to the FortiGate unit and is assigned an IP address from this range. Afterward, the FortiGate unit uses the assigned address to communicate with the SSL VPN client.

Caution: Take care to prevent overlapping IP addresses. Do not assign IP addresses that are already in use on the private network. As a precaution, consider assigning IP addresses from a network that is not commonly used (for example, 10.254.2 54.0/24).

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Configuring a FortiGate SSL VPN Configuring SSL VPN settings

To reserve a range of IP addresses for tunnel-mode clients

1 Go to VPN > SSL > Config. 2 In the Tunnel IP Range fields, type the starting and ending IP addresses (for

example, 10.254.254.80 to 10.254.254.100).

3 Select Apply.

Enabling strong authentication through security certificates

The FortiGate unit supports strong (two-factor) authentication through X.509 security certificates (version 1 or 3). Strong authentication can be configured for SSL VPN user groups by selecting the Server Certificate and Require Client Certificate options on the VPN > SSL > Config page. However, you must first ensure that the required certificates have been installed.

To generate certificate requests, install signed certificates, import CA root certificates and certificate revocation lists, and back up and/or restore installed certificates and private keys, refer to the FortiGate Certificate Management User

Guide.

Specifying the cipher suite for SSL negotiations

The FortiGate unit supports a range of cryptographic cipher suites to match the capabilities of various web browsers. The web browser and the FortiGate unit negotiate a cipher suite before any information (for example, a user name and password) is transmitted over the SSL link.

1 Go to VPN > SSL > Config. 2 In Encryption Key Algorithm, select one of the following options:

• If the web browser on the remote client is capable of matching a 128-bit or greater cipher suite, select Default - RC4(128 bits) and higher.

• If the web browser on the remote client is capable of matching a high lev el of SSL encryption, select High - AES(128/256 bits) and 3DES. This option enables cipher suites that use more than 128 bits to encrypt data.

• If you are not sure which level of SSL encryption the remote client web browser supports, select Low - RC4(64 bits), DES and higher. The web browser must at least support a 64-bit cipher length.

3 Select Apply.

Setting the idle timeout setting

The idle timeout setting controls how long the connection can remain idle before the system forces the remote user to log in again. To improve security , keep the default value of 300 seconds.

1 Go to VPN > SSL > Config. 2 In the Idle Timeout field, type an integer value. The valid range is from 10 to

28800 seconds.

3 Select Apply.

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Configuring SSL VPN settings Configuring a FortiGate SSL VPN

Setting the client authentication timeout setting

The client authentication timeout setting controls how long an authenticated connection will remain connected. When this time expires, the system forces the remote client to authenticate again.

Note: The default value is 1500 seconds. You can only modify this timeout value in the CLI.

For example, to change the authentication timeout to 1800 seconds, enter the following commands:

config vpn ssl settings

set auth-timeout 1800 end

Adding a custom caption to the web portal home page

You can add a custom caption (maximum 31 characters) to the top of the web portal home page.

To add a custom caption

1 Go to VPN > SSL > Config. 2 In the Portal Message field, type the caption. 3 Select Apply.

Adding WINS and DNS services for clients

You can specify the WINS or DNS servers that are made available to SSL-VPN clients.

1 Go to VPN > SSL > Config. 2 Select the blue triangle to open the Advanced section. 3 Enter the IP addresses of one or two DNS Servers to be provided for the use of

clients.

4 Enter the IP addresses of one or two WINS Servers to be provided for the use of

clients.

Redirecting a user group to a popup window

The FortiGate unit redirects web browsers to the web portal home page after the remote client has been authenticated and the user has logged in successfully.

As an option, you can have the FortiGate unit display a second HTML page in a popup window when the client web browser is redirected to the web portal home page. To support this feature, the level of security settings associated with the Internet zone in the web browser must be set to permit popup windows.

The following procedure assumes that SSL VPN user groups have been defined (see “Configuring user accounts and SSL VPN user groups” on page 42). A different popup window can be specified per user group .

To display a custom popup window for a user group

1 Go to User > User Group.

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Configuring a FortiGate SSL VPN Configuring user accounts an d SSL VPN user groups

2 Select the Edit icon in the row that corresponds to the SSL VPN user group. 3 Expand SSL-VPN User Group Options. 4 In the Redirect URL field, type the URL of the web page that you want to display in

the popup window.

5 Select OK.

Customizing the web portal login page

The HTML code making up the web portal login page can be edited. Before you begin, copy the default text to a separate text file for safe-keeping. Afterward, if editing produces unexpected results, you can restore the text to the original version.

To edit the HTML code

1 Go to System > Config > Replacement Messages. 2 Expand the SSL VPN row and select the Edit icon that corresponds to the SSL

VPN login message.

3 Edit the HTML text, subject to the restrictions given in the FortiGate Administration

Guide (see “Changing the authentication login page” in the “System Con fig”

chapter). Select OK.

Configuring user accounts and SSL VPN user groups

Remote users must be authenticated before they can request services and/or access network resources through the web portal. The authentication process relies on FortiGate user group definitions, which can optionally use established authentication mechanisms such as RADIUS and LDAP to authenticate remote clients.

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Configuring user accounts and SSL VPN user groups Configuring a FortiGate SSL VPN

You can choose to use a plain text password for authentication through the FortiGate unit (Local domain), forward authentication request s to an external RADIUS or LDAP server, or utilize PKI certificate authentication. If password protection will be provided through a RADIUS or LDAP server, you must configure the FortiGate unit to forward authentication requests to the RADIUS or LDAP server. In the case of certificate authentication, you must install the required certificates.

The following procedures explain how to create a user account and user group in the Local domain. For information about how to create RADIUS, LDAP or PKI user accounts, refer to the “User” chapter of the FortiGate Administration Guide. For information about certificate authentication, see the FortiGate Certificate

Management User Guide.

To create a user account in the Local domain

1 Go to User > Local and select Create New.

User Name Type or edit the remote user name (for example, User_1). Disable Select Disable to prevent this user from authenticating. Password Select Password to authenticate this user using a password stored on

LDAP Select LDAP to authenticate this user using a password stored on an

RADIUS Select RADIUS to authenticate this user using a password stored on a

the SSL VPN unit. Type or edit the password to be associated with the user account. The

password should be at least six characters long.

LDAP server. Select the LDAP server from the drop-down list.

RADIUS server. Select the RADIUS server from the drop-down list.

2 Select OK. 3 Repeat this procedure for each remote user.

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Configuring a FortiGate SSL VPN Configuring user accounts an d SSL VPN user groups

To create a user group

1 Go to User > User Group and select Create New.

2 In the Name field, type a name for the group (for example, Web-only_group). 3 From the Type drop-down list, select SSL VPN. 4 One at a time, select user names from the Available Users/Group s list, and select

the right-pointing arrow to move them to the Members list.

5 Select the blue triangle to expand the SSL-VPN User Group Options. 6 Select Enable SSL-VPN Tunnel Service if the remote clients associated with the

user group need to establish an SSL VPN tunnel with the FortiGate unit.

Note: If a user has been configured to use tunnel-mode only, when they log in, the tunnel is brought up automatically. The split tunneling feature is not activated by default, it must be selected.

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Configuring user accounts and SSL VPN user groups Configuring a FortiGate SSL VPN

7 To activate the split tunnel feature, select Enable Split Tunne ling. Split tunneling

ensures that only the traffic for the private network is sent to the SSL VPN gateway. Internet traffic is sent through the usual unencrypted route.

8 To override the Tunnel IP range defined in VPN > SSL > Config, enter the starting

and ending IP address range for this group in the Restrict tunnel IP range for this group fields.

Note: If you configure a user group and define Restrict tunnel IP range for this group, the group range is used in the SSL VPN configuration. If you do not define a range of global IP addresses, you must define a group range. If you define both IP address ranges, the group level range is applied to the configuration.

9 If the user group requires web-only-mode access, select Enable Web Application

and then select the web applications and/or network file services that the user group needs. The corresponding server applications can be running on the network behind the FortiGate unit or accessed remotely through the Internet.

10 To enable client-integrity checking options, select from the following:

• Check FortiClient AV Installed and Running

• Check FortiClient FW Installed and Running

• Check for Third Party AV Software

• Check for Third Party Firewall Software

• Require Virtual Desktop Connection The client-integrity checking options determine whether the Fort iClient™ Host

Security application or other antivirus/firewall applications are running on the client computer before a tunnel is established. The host-checking function is performed by the ActiveX/Java Platform control, which is downloade d and installed on the client computer the first time the client initiates the SSL VPN portal.

Note: The user account used to install the SSL VPN client on the remote computer must have administrator privileges. If the user account does not have administrator privileges, the installation will fail (with Windows, there will be no error message with a failed installation). After the ActiveX or Java Platform control is installed, the client computer can be used by a user who does not have administrator privileges.

If there are no applications installed and enabled on the client computer, the connection is refused. Table 1 lists the products supported for clients who have Windows XP SP2. All other systems must have Norton (Symantec) AntiVirus or McAfee VirusScan software installed and enabled.

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Configuring a FortiGate SSL VPN Configuring firewall policies

Table 1: AV/Firewall supported product detection

Product AV Firewall

Norton Internet Security 2006 YY Trend Mic r o PC-c illin YY McAfee YY Sophos Anti-Virus YN Panda Platinum 2006 Internet Security YY F-Secure YY Secure Resolutions YY Cat Computer Services YY AhnLab YY Kaspersky YY ZoneAlarm YY

Require Virtual Desktop Connection preven ts a user from est ablishing a SSL VPN session without using the SSL VPN Virtual Desktop application. For more information, see the SSL VPN User Guide.

11 To enable the FortiGate unit to remove residual information from the remote client

computer (for example, from the web browser cache) just before the SSL VPN session ends, select Enable Cache Clean. When this feature is enabled, if the client’s browser cannot install and ru n the cache cleaner , the user is not al lowed to access the SSL-VPN portal.

12 To allow the SSL VPN user group to use a pre-configured bookmark group,

enable Bookmarks and select the bookmark group from the drop-down list.

13 To have the FortiGate unit display a second HTML page in a popup window when

the web portal home page is displayed, type the URL of the web page into the Redirect URL field.

14 To display a custom web portal home page caption for this group, enter the

message in the Customize portal message for this group field.

Note: This custom message overrides the portal message configured in

SSL > Config.

15 Select OK.

Configuring firewall policies

This section contains the procedures need ed to configure firewall policies for webonly mode operation and tunnel-mode operation. These procedures assume that you have already completed the procedures outlined in “Configuring user

accounts and SSL VPN user groups” on page 42.

A firewall policy specifies the originating (source) IP address of a packet and the destination address defines the IP address of the intended recipient or network.

In general, configuring a firewall policy involves:

• specifying the IP source and destination addresses

VPN >

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Configuring firewall policies Configuring a FortiGate SSL VPN

• specifying the level of SSL encryption to use and the authentication method

• binding the user group to the firewall policy

Note: In tunnel mode, it is necessary to create a DENY firewall policy that immediately follows the SSL VPN policy. If this policy is not created, SSL VPN tunnels will use other ACCEPT firewall policies. See the order of the Firewall policies below:

The following topics are included in this section:

• Configuring firewall addresses

• Configuring tunnel-mode firewall policies

• Configuring SSL VPN event-logging

• Monitoring active SSL VPN sessions

Configuring firewall addresses

Configuring the firewall addresses for web-only and tunnel mode connections involves specifying the IP source/host and destination addresses:

Web-only mode:

• For the source address, select the predefined address “all” in the firewall encryption policy to refer to web-only mode clients.

• The destination address corresponds to the IP address or addresses that remote clients need to access. The destination address may correspond to an entire private network (behind the FortiGate unit), a range of private IP addresses, or the private IP address of a server or host.

Tunnel mode:

• The source address corresponds to the pu blic IP add ress th at can be connected to the FortiGate unit. This address is used to restrict who can access the FortiGate unit.

Configuring Web-only firewall policies

To specify the destination IP address

1 Go to Firewall > Address and select Create New. 2 In the Address Name field, type a name that represents the local network,

server(s), or host(s) to which IP packets may be delivered (for example, Subnet_1).

3 From the Type list, select Subnet/IP Range. 4 In the Subnet/IP Range field, type the co rresponding IP address and subnet mask

(for example, 172.16.10.0/24).

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Configuring a FortiGate SSL VPN Configuring firewall policies

Note: To provi de access to a single host or server, you would type an IP address like

172.16.10.2/32. To provide access to two servers having contiguous IP addresses, you would type an IP address range like 172.16.10.[4-5].

5 Select OK.

To define the firewall policy for web-only mode connections

1 Go to Firewall > Policy and select Create New. 2 Enter these settings in particular:

Source Interface/Zone

Destination Interface/Zone

Service Select ANY. Action Select SSL-VPN. SSL Client

Certificate Restrictive

Cipher Strength Select one of the following options to determine the level of SSL

User Authentication Method

Available Groups

Select the FortiGate interface that accepts connections from remote users.

Address Name Select all.

Select the FortiGate interface to the local private network (for example, dmz).

Address Name Select the IP destination address that you defined previously (for example, Subnet_1).

Select to allow traffic generated by holders of a (shared) group certificate, for example, a user group containing PKI peers/users. The holders of the group certificate must be members of an SSL VPN user group, and the name of that user group must be present in the Allowed list.

encryption to use. The web browser on the remote client must be capable of matching the level that you select:

• To use any cipher suite, select Any.

• To use a 164-bit or greater cipher suite, select High >= 164.

• To use a 128-bit or greater cipher suite, select Medium >= 128. Select one of the following options to bind user groups to authentication

methods:

• If the user group contains only local users, select Local.

• If the remote clients will be authenticated by an external RADIUS server, select Radius.

• If the remote clients will be authenticated by an external LDAP server, select LDAP.

• If the user group contains Local, RADIUS, and LDAP users, select Any to enable all of the authentication methods. Local is attempted first, then RADIUS, then LDAP.

Select the name of the user group requiring SSL VPN access, and then select the right-pointing arrow. Do not select more than one user group unless all members of the selected user groups have identical access requirements.

3 Select OK. 4 If the user group requires access to another server or network, create the IP

destination address (see “To specify the destination IP address” on page 46) and repeat this procedure to create the required firewall policy.

5 Create additional IP destination addresses and firewall policies if required for

each additional user group.

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Configuring firewall policies Configuring a FortiGate SSL VPN

Configuring tunnel-mode firewall policies

Follow the procedures in this section to complete a tunnel-mode configuration. These procedures assume that you have already completed the pr ocedures found in “Configuring user accounts and SSL VPN user groups” on page 42.

When a remote client initiates a connection to the FortiGate unit, the FortiGate unit authenticates the client and determines which mode of operation is in effect for the user. When tunnel mode is enabled, the user can access the server applications and network services on the internal network if required and/or download and install an ActiveX plugin from the web portal. The ActiveX control provides SSL VPN client software.

Note: On the web browser, ensure that the security settings associated with the Internet zone permit ActiveX controls to be downloaded and run.

After the user adds the ActiveX plugin to the web browser on the remote client, the user can start the SSL VPN client software to initiate an SSL VPN tunnel with the FortiGate unit. The FortiGate unit establishes the tunnel with the SSL client and assigns the client a virtual IP address. Afterward, the SSL client uses the assigned virtual IP address as its source address for the duration of the session.

To configure the FortiG ate unit to support tunnel-mode access, you pe rform the following configuration tasks on the FortiGate unit:

• Specify the IP address(es) that can be assigned to the SSL VPN client when they establish tunnels with the FortiGate unit.

• Define a firewall policy to support tunnel-mode operations.

A firewall policy specifies the originating (source) IP address of a packet and the destination address defines the IP address of the intended recipient or network. In this case, the source address corresponds to the IP address of the remote user that will connect to the FortiGate unit, and the destination address corresponds to the IP address(es) of the host(s), server(s), or network behind th e FortiGate unit.

Configuring the firewall policy involves:

• specifying the source and destination IP addresses:

• The source address corresponds to the IP address of the remote user.

• The destination address corresponds to the IP address or addresses that

remote clients need to access. The destination address may correspond to an entire private network, a range of private IP addresses, or the private IP address of a server or host.

• specifying the level of SSL encryption to use and the authentication method

• binding the user group to the firewall policy

Note: If your destination address, SSL encryption, and user group are the same as for your web-only mode connection, you do not need to create a firewall policy for tunnel mode. The FortiGate unit uses the web-only mode policy settings except for the source address range, which it obtains from the tunnel IP range settings.

To specify the source IP address

1 Go to Firewall > Address and select Create New. 2 In the Address Name field, type a name that represents the IP address that is

permitted to set up SSL VPN connection.

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Configuring a FortiGate SSL VPN Configuring firewall policies

3 From the Type list, select Subnet/IP Range. 4 In the Subnet/IP Range field, type the corresponding IP ad dress and subnet mask

(for example, 172.16.10.0/24). If the remote client’s IP address is unknown, the Subnet/IP Range should be “all”, with 0.0.0.0/0.0.0.0 as the address used.

Note: To provi de access to a single host or server, you would type an IP address like

172.16.10.2/32. To provide access to two servers having contiguous IP addresses, you would type an IP address range like 172.16.10.[4-5].

5 In the Interface field, select the interface to the internal (private) network. 6 Select OK.

To specify the destination IP ad d r es s

1 Go to Firewall > Address and select Create New. 2 In the Address Name field, type a name that represents the local network,

server(s), or host(s) to which IP packet s may be delivered (for example, Subnet_2).

3 In the Subnet/IP Range field, type the corresponding IP address (for example,

192.168.22.0/24 for a subnet, or 192.168.22.2/32 for a server or host), or IP address range (192.168.22.[10-25]).

4 In the Interface field, select the interface to the external (public) network. 5 Select OK.

To define the firewall policy for tunnel-mode operations

1 Go to Firewall > Policy and select Create New. 2 Enter these settings:

Source Interface/Zone

Destination Interface/Zone

Service Select ANY. Action Select SSL-VPN. SSL Client Certificate

Restrictive

Select the FortiGate interface that accepts connections from remote users (for example, external).

Address Name Select the name that corresponds to the IP address of the remote user.

Select the FortiGate interface to the local private network (for example, internal).

Address Name Select the IP destination address that you defined previously for the host(s), server(s), or network behind the FortiGate unit (for example, Subnet_2).

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Configuring SSL VPN event-logging Configuring a FortiGate SSL VPN

Cipher Strength Select one of the following options to determine the level of SSL

User Authentication Method

Available Grou ps Select the name of the user group requiring SSL VPN access, and

encryption to use. The web browser on the remote client must be capable of matching the level that you select:

• To use any cipher suite, select Any.

• To use a 164-bit or greater cipher suite, select High >= 164.

• To use a 128-bit or greater cipher suite, select Medium >= 128. Select one of the following options to bind user groups to

authentication methods:

• If the user group contains only local users, select Local.

• If the remote clients will be authenticated by an external RADIUS server, select Radius.

• If the remote clients will be authenticated by an external LDAP server, select LDAP.

• If the user group contains Local, RADIUS, and LDAP users, select Any to enable all of the authentication methods. Local is attempted first, then RADIUS, then LDAP.

then select the right-pointing arrow. Do not select more than one user group unless all members of the selected user groups have identical access requirements.

3 Select OK.

Note: If you apply a protection profile in a SSL VPN firewall policy, it will only apply to

tunnel-mode operations.

4 If the user group requires access to another server or network, create the IP

destination address (see “To specify the destination IP address” on page 46) and repeat this procedure to create the required firewall policy.

5 Create additional IP destination addresses and firewa ll policies if required for each

additional user group.

Configuring SSL VPN event-logging

You can configure the FortiGate unit to log SSL VPN events. For information about how to interpret log messages, see the FortiGate Log Message Reference.

To log SSL VPN events

1 Go to Log&Report > Log Config > Log Setting. 2 Enable the storage of log messages to one or more of the following locations:

• a FortiAnalyzer unit

• the FortiGate system memory

• a remote computer running a syslog server

Note: If available on your FortiGate unit, you can enable the storage of log messages to a system hard disk. In addition, as an alternative to the options listed above, you may choose to forward log messages to a remote computer running a WebTrends firewall reporting server. For more information about enabling either of these options through CLI commands, see the “log” chapter of the FortiGate CLI Reference.

3 If the options are concealed, select the blue arrow beside each option to reveal

and configure associated settings.

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Configuring a FortiGate SSL VPN Monitoring active SSL VPN sessions

4 If logs will be written to system memory, from the Log Level list, select Information.

For more information, see the “Log & Report” chapter of the FortiGate

Administration Guide.

5 Select Apply.

To filter SSL VPN events

1 Go to Log&Report > Log Config > Event Log. 2 Select Enable, and then select one or more of the following options:

• SSL VPN user authentication event

• SSL VPN administration event

• SSL VPN session event

3 Select Apply.

To view SSL VPN event logs

1 Go to Log&Report > Log Access. 2 If the option is available from the Type list, select the log file from disk or memory.

You can modify the settings in the top row to meet your requirements. Log messages are displayed beneath the top row.

Monitoring active SSL VPN sessions

You can display a list of all active SSL VPN sessions. The list displays the user name of the remote user, the IP address of the remote client, and the time that the connection was made. The list also identifies which services are being provided (see Figure 6).

To view the list of active sessions, go to VPN > SSL > Monitor.

Figure 6: Monitor list: Web-only mode connections

No. The identifier of the connection. User The user names of all connected remote users. Source IP The IP addresses of the host devices connected to the FortiGate unit. Begin Time The starting time of each connection. Description Information about which services are being provided.

When a tunnel-mode user is connected, the Description field displays the IP address that the FortiGate unit assigned to the remote host (see Figure 7).

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Configuring SSL VPN bookmarks and bookmark groups Configuring a FortiGate SSL VPN

Delete

Edit

Delete

Figure 7: Monitor list: Tunnel-mode connection

If required, you can end a session/connection b y selecting the Delete button in the row that corresponds to the connection.

Configuring SSL VPN bookmarks and bookmark groups

If you create a user account that permits web-only mode access, you can create hyperlinks to frequently accessed server applications that the us er can use to start any session from the home page through the hyperlinks. The FortiGa te unit forwards client requests to servers on the Internet or internal network. To use the web-portal applications, you add the URL, IP address, or name of the server application to the Bookmarks list. The bookmarks are available when the user starts an active SSL VPN session.

Viewing the SSL VPN bookmark list

You can display a list of all existing SSL VPN bookmarks created using the FortiGate unit. The list details the name of the bookmark, type of bookmark, and the link details.

To view the list of predefined SSL VPN bookmarks, go to VPN > SSL >

Bookmark.

Figure 8: Bookmark list

Bookmark Name The type/names of links to remote server applications and network

Link The URL, host, or folder of the bookmark link. Delete and Edit

icons

See also

• Configuring SSL VPN settings

• Monitoring active SSL VPN sessions

• Configuring SSL VPN bookmarks and bookmark groups

• Configuring SSL VPN bookmarks

services.

Delete or edit an entry in the list.

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Configuring a FortiGate SSL VPN Configuring SSL VPN bookmarks and bookmark groups

• Viewing the SSL VPN Bookmark Groups list

• Configuring SSL VPN bookmark groups

Configuring SSL VPN bookmarks

Go to VPN > SSL > Bookmark and select Create New to create hyperlinks to frequently accessed server applications.

Figure 9: Create New Bookmark

Bookmark Name Type the text to display in the hyperlink. The name is displayed in the

Application Type Select the abbreviated name of the server application or network

URL/Host/Folder Type the information that the FortiGate unit needs to forward client

Bookmarks list.

service from the drop-down list:

• Web

• Telnet

• FTP

• SMB/CIFS

• VNC

• RDP

• SSH

requests to the correct server application or network service:

• If the application type is Web, type the URL of the web server (for example, www.fortinet.com).

• If the application type is Telnet, type the IP address of the telnet host (for example, 10.10.10.10).

• If the application type is FTP, type the IP address of the FTP host as a root directory/folder (for example, //server/folder/).

• If the application type is SMB/CIFS, type the IP address of the SMB host and the root directory/folder associated with your account (for example, //server/folder/).

• If the application type is VNC, type the IP address of the host (for example, 10.10.10.10).

• If the application type is RDP, type the IP address of the RDP host (for example, 10.10.10.10).

• If the application type is SSH, type the IP address of the SSH host (for example, 10.10.10.10).

See also

• Configuring SSL VPN settings

• Monitoring active SSL VPN sessions

• Configuring SSL VPN bookmarks and bookmark groups

• Viewing the SSL VPN bookmark list

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Configuring SSL VPN bookmarks and bookmark groups Configuring a FortiGate SSL VPN

• Viewing the SSL VPN Bookmark Groups list

• Configuring SSL VPN bookmark groups

Viewing the SSL VPN Bookmark Groups list

You can create a group of specific bookmarks that can be included in the configuration of an SSL VPN user group.

To view a list of bookmark groups, go to VPN > SSL > Bookmark Group.

Figure 10: Bookmark Group list

Group Name Name of bookmark group Bookmarks List of bookmarks that are components of the bookmark group in Group

Delete and Edit icons

Name. Delete or edit an entry in the list.

See also

• Configuring SSL VPN settings

• Monitoring active SSL VPN sessions

• Configuring SSL VPN bookmarks and bookmark groups

• Viewing the SSL VPN bookmark list

• Configuring SSL VPN bookmarks

• Configuring SSL VPN bookmark groups

Configuring SSL VPN bookmark groups

Go to VPN > SSL > Bookmark Group and select Create New to create a group of selected bookmarks.

Figure 11: Create New Bookmark Group

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Configuring a FortiGate SSL VPN Configuring SSL VPN bookmarks and bookmark groups

Name Type the name of the bookmark group. The name is displayed in the

Available Bookmarks

Used Bookmarks The list of bookmarks that belong to the bookmark group. Right arrow

button

Left arrow button Remove a bookmark from the Used Bookmarks list.

Create New... Select to create a new bookmark for inclusion in the Available

Bookmark Group list, and is a selection in the Bookmarks list in an SSL VPN user group.

The list of bookmarks available for inclusion in the bookmark group. Lists bookmarks under appropriate category (FTP, RDP, SMB, Telnet, VNC, Web, or SSH).

Add a bookmark to the Used Bookmarks list. Select a bookmark name in the Available Bookmarks list and select the

right arrow button to move it to the Used Bookmarks list.

Select a bookmark in the Used Bookmarks list and select the left arrow button to move it to the Available Bookmarks list.

Bookmarks list.

See also

• Configuring SSL VPN settings

• Monitoring active SSL VPN sessions

• Configuring SSL VPN bookmarks and bookmark groups

• Viewing the SSL VPN bookmark list

• Configuring SSL VPN bookmarks

• Viewing the SSL VPN Bookmark Groups list

Assigning SSL VPN bookmark groups to SSL VPN users

To assign a bookmark group to a user group, go to User > User Group, and select/create a SSL VPN user group to assign the bookmark group to. Exp and the SSL-VPN User Group Options, enable Bookmarks and select a bookmark group from the drop-down list. When you assign a bookmark group to a SSL VPN user group, all the bookmarks included in the group are av aila b l e to the SSL VPN users in the selected SSL VPN user group.

Figure 12: Assigning a bookmark group to a user

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SSL VPN host OS patch check Configuring a FortiGate SSL VPN

SSL VPN host OS patch check

SSLVPN Client OS Patch Check feature allows a client with a specific OS patch to access SSL VPN services. The host check only works on Windows platforms. This means that MacOS/Linux users can always logon (assuming they have the correct user name and password) as the patch check is no t applied to them. Options defined in the SSL VPN user group settings support this function (CLI only):

Variable Description

set sslvpn-os-check {disable | enable}

config sslvpn-os-checklist {windows-2000 | windows-xp}

set action {allow | check-up-to-date | deny}

set latest-patch-level {disable | 0 - 255}

set tolerance {tolerance_num}

Enable or disable SSL VPN OS patch level check. Default disable.

Configure the OS of the patch level check. Available when set sslvpn-os-check is set to

enable. Specify how to perform the patch level check.

• allow - any level is permitted

• check-up-to-date - some patch levels are permitted,

make selections for latest-patch-level and tolerance

• deny - OS version does not permit access Available when set sslvpn-os-check is set to

check-up-to-date. Specify the latest allowed patch level. Default 4 for

Windows 2000, 2 for Windows XP. Available when action is set to enable.

Specify the lowest allowable patch level tolerance. Equals latest-patch-level minus tolerance and above. Default for Windows 2000 and Windows XP is 0.

Available when action is set to check-up-to-date.

Configuration Example

The following configuration allows a Windows 2000 user with patch level 2

latest-patch-level minus tolerance) and above permission to access SSL

( VPN services, as well as any Windows XP users.

config vpn ssl settings

set sslvpn-enable enable set tunnel-endip 10.1.1.10

set tunnel-startip 10.1.1.1 end config user group

edit "g1" set group-type sslvpn

set sslvpn-tunnel enable set sslvpn-tunnel-startip 10.1.1.1 set sslvpn-tunnel-endip 10.1.1.10 set sslvpn-webapp enable set sslvpn-os-check enable config sslvpn-os-check-list "windows-2000"

set action check-up-to-date set latest-patch-level 3

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Configuring a FortiGate SSL VPN Granting unique access permissions for SSL VPN tunnel user groups

set tolerance 1 end config sslvpn-os-check-list "windows-xp" set action allow

end set member "u1" set sslvpn-split-tunneling enable set sslvpn-http enable

next end config firewall policy

edit 1

set srcintf "internal" set dstintf "external" set srcaddr "all" set dstaddr "172.18.8.0/24" set action ssl-vpn set schedule "always" set service "ANY" set groups "g1"

next end

Granting unique access permissions for SSL VPN tunnel user groups

For situations where there is a requirement for more than one user to be permitted tunnel mode access, the key is to split the tunnel IP range into sub-IP ranges, where each user group (with the user as a member) is assigned a dedicated IP range (with no overlap) and therefore can have different access permissions.

Figure 13: SSL VPN configuration for unique access permissions

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Granting unique access permissions for SSL VPN tunnel user groups Configuring a FortiGate SSL VPN

Sample configuration for unique access permissions with tunnel mode user groups

In this sample configuration, there are two user gr oups, each one with a dedicated IP address range.

Note: The source address for both SSL VPN firewall policies can be left as ‘all’ when the users do not have static public IPs.

First, you establish the tunnel IP range. Go to VPN > SSL, and enable SSL-VPN. Enter the Tunnel IP Range corresponding to the range of IP addresses available

for the users/user groups, in this case 10.1.1.1 - 10.1.1.100.

Figure 14: Enable SSL-VPN Settings

After enabling SSL VPN, you must create the users and the n the user g roup s that require SSL VPN tunnel mode access.

Go to User > Local and create user1 and user2 with password authentication.

Note: user1 only has permission to access the Linux server, while user2 only has permission to access the Windows PC.

After you create the users, you must create the SSL VPN user grou p s . In order to configure each user with different access permissions, you must create separate user groups and designate specific IP ranges for each group.

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Configuring a FortiGate SSL VPN Granting unique access permissions for SSL VPN tunnel user groups

Go to User > User Group. Create group1 as an SSL VPN user group with user1 as the member and 10.1.1.1 - 10.1.1.50 as the values in ‘Restrict tunnel IP range for this group’.

Figure 15: group1 user group attributes

Create group2 as an SSL VPN user group with user2 as the member and

10.1.1.51 - 10.1.1.100 as the values in ‘Restrict tunnel IP range for this group’.

Figure 16: group2 user group attributes

After you create the user groups, you need to define the firewall policies to support tunnel-mode operations.

The firewall policy specifies the originating (source) IP address of a packet and the destination address that defines the IP addr e ss of th e inte nde d recip ien t or network. In this configuration, the source add re ss co rr espo nd s to th e pu blic IP address that can connect to the FortiGate unit, and the destination address corresponds to the IP address of the Linux server/Windows PC behind the FortiGate unit.

Before you create the firewall policy, you must define the source and destination addresses to include in the policy.

Go to Firewall > Address to create the source and destination addresses to specify in the firewall policies.

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Granting unique access permissions for SSL VPN tunnel user groups Configuring a FortiGate SSL VPN

Figure 17: Source/destination firewall addresses - Public IP

Figure 18: Source/destination firewall addresses - Linux/Windows PC

After creating the source and destination addresses, go to Firewall > Policy to create the firewall policies.

The policy for user1 is an SSL-VPN firewall policy that includes the applicable source and destination addresses, and has group1 as the user group attached to the policy.

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Configuring a FortiGate SSL VPN Granting unique access permissions for SSL VPN tunnel user groups

Figure 19: user1 firewall policy

The user2 policy is also an SSL-VPN firewall policy that includes the applicable source and destination addresses, and has group2 as the user group attached to the policy.

Figure 20: user2 firewall policy

To view the SSL VPN policies, go to Firewall > Policy.

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SSL VPN virtual interface (ssl.root) Configuring a FortiGate SSL VPN

Figure 21: Firewall policy list

To avoid overlap with other firewall policies, add a DENY policy below the SSL VPN policies (the source is the SSL VPN tunnel IP range). See Configuring

firewall policies for more information.

SSL VPN virtual interface (ssl.root)

Configuration of the SSL VPN tunnel service involves a virtual interface, ssl.<vdom_name>, which functions much like an ipsec-virtual interface. In nonvdom implementations, this appears as ssl.root. The ssl.root interface appears in the firewall policy interface lists and static route interface lists. The ssl-root interface allows remote user access to additional networks. For example, the interface facilitates the remote user´s ability to browse the Internet using the FortiGate unit.

The SSL VPN tunnel-mode access requires the following firewall policies:

• External > Internal, with the action set to SSL, with an SSL user group

• ssl.root > Internal, with the action set to Accept

• Internal > ssl.root, with the action set to Accept This also requires a new static route and should appear as follows:

• Destination network - <ssl tunnel mode assigned range> interface ssl.root If you are configuring Internet access through an SSL VPN tunnel, the following

configuration must be added:

• ssl.root > External, with the action set to Accept, with NAT enabled

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Configuring a FortiGate SSL VPN SSL VPN virtual interface (ssl.root)

Go to Firewall > Policy and select Create New to create a firewall policy. For a standard configuration, set up the firewall policies listed below.

Authentication policy Source wan1 Source address all Destination internal Destination address internal subnet Action sslvpn Authentication ssl user group(s)

Inbound access policy Source ssl.root Source address ip address of remote client Destination internal Destination address internal subnet Action accept Authentication No authentication set

Outbound policy Source internal Source address internal subnet Destination ssl.root Destination address ssl assigned range Action Accept Authentication No authentication set

Static route Destination network <ssl-assign ed subnet> Destination interface ssl.root

To allow ssl users to browse the Internet through the FortiGate unit:

Internet browsing policy Source ssl.root Source address ssl-assigned range Destination wan1 Destination address all Action accept NA T enabled Yes Protection profile Recommended

To allow SSL-tunnel users to access a policy-based VPN peer network:

Peer network policy Source ssl.root Source address ssl-assigned range

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SSL VPN dropping connections Configuring a FortiGate SSL VPN

Destination wan1 Destination address remote VPN subnet Action ipsec VPN tunnel <vpn phase1 name>

SSL VPN dropping connections

When a FortiGate unit has multiple internet connections, the SSLVPN client can connect to the SSLVPN web portal, but when attempting to click Connect to start tunnel mode SSLVPN, the tunnel will start up for a few seconds, then shut down.

This issue occurs when there are multiple interfaces connected to the Internet, for example, a dual wan configuration.

To resolve this issue, upgrade the FortiGate unit to at least 3.0 MR4 or higher. Use following commands in CLI to resolve the issue:

config vpn ssl settings

set route-source-interface enable

end

Note: This CLI command is only available in FortiOS 3.00 MR4 and higher.

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Configuring a FortiGate SSL VPN SSL VPN dropping connections

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SSL VPN dropping connections Configuring a FortiGate SSL VPN

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Working with the web portal Connecting to the FortiGate unit

Working with the web portal

This section introduces the web portal features and explains how to configure them.

The following topics are included in this section:

• Connecting to the FortiGate unit

• Web portal home page features

• Launching web portal applications

• Starting a session from the Tools area

• Tunnel-mode features

• Logging out

• Adding a bookmark to the My Bookmarks list

• Working with the ActiveX/Java Platform plug-in

• Uninstalling the ActiveX/Java Platform plugin

• URL re-writing

Connecting to the FortiGate unit

You can connect to the FortiGate unit using a web browser. The URL of the FortiGate interface may vary from one installation to the next. If required, ask your FortiGate administrator for the URL of the FortiGate unit, and obtain a user name and password.

In addition, if you will be using a personal or group security (X.509) certificate to connect to the FortiGate unit, your web browser may prompt you for the name of the certificate. Your FortiGate administrator can tell you which certificate to select.

To log in to the FortiGate secure HTTP gateway

1 Using the web browser on your computer, browse to the URL of the FortiGate unit

(for example, https://<FortiGate_IP_address>:10443/remote).

2 The FortiGate unit may offer you a self-signed security certificate. If you are

prompted to proceed, select Yes.

3 A second message may be displayed to inform you that the FortiGate certificate

distinguished name differs from the original req uest. This message is displayed because the FortiGate unit is attempting to redirect your web browser connection. You can ignore the message.

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Web portal home page features Working with the web portal

4 When you are prompted for your user name and password:

• In the Name field, type your user name.

• In the Password field, type your password.

5 Select Login.

The FortiGate unit will redirect your web browser to the FortiGate SSL VPN Remote Access Web Portal home page automatically.

Web portal home page features

The FortiGate SSL VPN Remote Access Web Port al home p age is displayed after you log in.

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Working with the web portal Web portal home page features

Delete

Edit

Help

Logout

Figure 22: FortiGate SSL VPN Remote Access Web Portal page

If your user account permits web-only mode access, and your administrator has set up pre-defined bookmarks for you, they will appear in a list under Pre-defined Bookmarks. You can start any session from these hyperlinks, but you cannot change them. Also, you can create your own hyperlinks to frequently accessed server applications and start any session from the home page through these hyperlinks. See “Launching web portal applications” and “Adding a bookmark to

the My Bookmarks list”.

If your user account permits tunnel-mode connections, you can install/uninstall Fortinet SSL VPN client software and/or initiate an SSL VPN tunnel with the FortiGate unit. Selecting the Activate SSL-VPN T unn el M ode link a t th e top of the home page displays the Fortinet SSL VPN Client area. See “Tunnel-mode

features”.

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Launching web portal applications Working with the web portal

In the Tools area, you can connect to a web server or start a telnet session. You can also check connectivity to a host or server on the network behind the FortiGate unit. For more information, see “Starting a session from the Tools area”.

Launching web portal applications

The FortiGate unit forwards client requests to servers on the Internet or internal network. To use the web-portal applications, you add the URL, IP address, or name of the server application to the My Bookmarks list (see “Adding a b ookmark

to the My Bookmarks list”).

Note: If you want to access a web server or telnet server without first adding a bookmark to the My Bookmarks list, type the URL or IP address of the server into the appropriate field under Tools instead (see “Starting a session from the Tools area”).

One or more of the following server applications may be available to you, depending on whether they were installed by the server administrator:

• Web servers (HTTP/HTTPS) download HTML pages in response to web browser requests.

• Telnet servers (TCP/IP Terminal Emulation Protocol) enable you to use your computer as a virtual terminal to log in to a remote host.

• FTP (File Transfer Protocol) servers enable you to transfer files between your computer and a remote host.

• SMB/CIFS servers implement the Server Message Block (SMB) protocol to support file sharing between your computer and a remote server host.

• VNC (Virtual Network Computing) servers en able you to remotely control another computer, for example, accessing work from your home computer.

• RDP (Remote Desktop Protocol) servers have a multi-channel protocol that allows users to connect to computers running Microsoft Terminal Services.

• SSH (Secure Shell) servers enable you to exchange data between two computers using a secure channel.

Note: Windows file sharing through SMB/CIFS is supported through shared directories.

When you access any of these server applications, the server m ay prompt you for a user name and password. To log in, you must have a user account created by the server administrator.

URL re-writing

When a FortiGate unit forwards client requests to servers on the Internet or internal network, there may be a requirement to access a site with a name or address that should not be exposed. For HTTP/HTTPS, the FortiGate unit employs an obfuscation technique that encrypts the hostname with a random key using AES-128, then the corresponding hex value plus ‘Z’ is added at the beginning to form the encoded name.

For example, in the case of the URL http://test.org/index.html, the FortiGate unit would translate to the following:

https://<sslvpn_host:port>/proxy/http/Z<encrypted hex value>/index.html

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Working with the web portal Launching web portal applications

Delete

Edit

The encryption key is only valid for the current user session. Once the user logs out, the key is no longer valid.

In the case of FTP and SMB, the path/filename is translated into its hex value for internal encoding purposes. The actual host ip is displayed. Other protocols are not supported.

The CLI command related to the obfuscation technique is url-obscuration in config vpn ssl settings.

Adding a bookmark to the My Bookmarks list

You can add a list of frequently used connections to the web portal home page. Afterward, select any hyperlink from the My Bookmarks list to initiate a session.

Figure 23: Frequently used connections in the My Bookmarks list

Add Bookmark Create a hyperlink. Bookmark T he names of links to remote server applications and network

Details The information that the FortiGate unit needs to forward client

Delete and Edit icons Delete or edit an entry in the list.

Figure 24: New Bookmark dialog box

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services.

requests to servers on the Internet or a private network behind the FortiGate unit.

Launching web portal applications Working with the web portal

Title Type the text to display in the hyperlink. The name is displayed in

Application Type Select the abbreviated name of the server application or network

URL, Host Name/IP, or Shared File Folder

the My Bookmarks list.

service from the drop-down list:

• Web

• T elnet

• FTP

• SMB/CIFS

• VNC

• RDP

• SSH

Type the information that the FortiGate unit needs to forward client requests to the correct server application or network service:

• If the application type is Web, type the URL of the web server (for example, http://www.google.com or https://172.20.120.101).

• If the application type is Telnet, type the IP address of the telnet host (for example, 10.10.10.10).

• If the application type is FTP, type the IP address of the FTP host as a root directory (for example, //10.10.10.10/share/).

• If the application type is SMB/CIFS, type the IP address of the SMB host and the root directory associated with your account (for example, //10.10.10.10/share/).

• If the application type is VNC, type the IP address of the VNC host (for example, 10.10.10.10).

• If the application type is RDP, type the IP address of the RDP host (for example, 10.10.10.10).

• If the application type is SSH, type the IP address of the SSH host (for example, 10.10.10.10).

To add an HTTP or HTTPS connection and access the web server

1 Select Add Bookmark. 2 In the Title field, type a name to represent the connection. 3 From the Application Type list, select Web. 4 In the URL field, type the URL of the web server (for example,

http://www.mywebexample.com or https://172.20.120.101).

5 Select OK. 6 To connect to the web ser ver, select the hyperlink that you created .

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Working with the web portal Launching web portal applications

The FortiGate unit replaces the URL with https://<FG_IP_address>:<port_no>/proxy/http/<specified_URL> and the requested page is displayed.

7 To end the session, close the browser window.

To add a telnet connection and start a telnet session

1 Select Add Bookmark. 2 In the Title field, type a name to represent the connection. 3 From the Application Type list, select Telnet. 4 In the Host Name/IP field, type the IP address of the telnet host (for example,

10.10.10.10).

5 Select OK. 6 To start a telnet session, select the hyperlink that you created.

Note: The FortiGate unit may offer you its self-signed security certificate. Select Yes to

proceed. A second message may be displayed to inform you of a host name mismatch. This message is displayed because the FortiGate unit is attempting to redirect your web browser connection. Select Yes to proceed.

7 Select Connect. 8 A telnet session starts and you are prompted to log in to the remote host. You

must have a user account to log in. After you log in, you may enter any seri es of valid telnet commands at the system prompt.

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Launching web portal applications Working with the web portal

9 To end the session, select Disconnect (or type exit) and then close the TELNET

connection window.

To add an FTP connection and start an FTP session

1 Select Add Bookmark. 2 In the Title field, type a name to represent the connection. 3 From the Application Type list, select FTP. 4 In the Shared File Folder field, type the IP address of the FTP host as a root

directory (for example, //10.10.10.10/).

5 Select OK. 6 To start the ftp session, select the hyperlink that you created. 7 When you are prompted to log in to the remote host, type your user name and

password. You must have a user account on the remote host to log in.

8 Select Login.

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Working with the web portal Launching web portal applications

Logout

New Directory

Rename

Delete

After you log in, the files and subdirectories in the root directory are displayed. You can switch to a subdirectory from the root directory. For example, the following image shows the contents of a subdirectory named share.

The view enables you to navigate through the file system and manipulate files in the following ways:

• To download a file from the current directory, select the file link in the Name column.

• To create a subdirectory in the current directory, se lect New directory.

• To delete a file or subdirectory from the current directory, select Delete.

• To rename a file in the current directory, select Rename.

• To upload a file from the remote directory to the current directory on your client computer, select the file link in the Name column.

• To access a subdirectory, select the file link in the Name column.

• When the current directory is a subdirectory, you can select Up to switch to the parent directory.

9 To end the FTP session, select Logout.

To add a SMB/CIFS connection and start a SMB session

1 Select Add Bookmark. 2 In the Title field, type a name to represent the connection. 3 From the Application Type list, select SMB/CIFS. 4 In the Shared File Folder field, type the IP address of the SMB host and the root

directory associated with your account (for example, //10.10.10.10/share/).

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Launching web portal applications Working with the web portal

Logout

New Directory

Rename

Delete

5 Select OK. 6 To start a SMB/CIFS session, select the hyperlink that you created. 7 When you are prompted to log in to the remote host, type your user name and

password. You must have a user account on the remote host to log in.

8 Select Login.

After you log in, the root directory associated with your user or group account is displayed. For example, in the figure below, the files and subdirectories in the root directory share are displayed.

The view enables you to navigate through the file system and manipulate files in the following ways:

• To download a file from the current directory, select the file link in the Name column.

• To create a subdirectory in the current directory, select New dire ctory.

• To delete a file or subdir ec to ry fr om the curr e nt direc to ry, select Delete.

• To rename a file in the cur re n t dire ct or y, select Rename.

• To upload a file from the remote directory to the current directory on your client computer, select the file link in the Name column.

• To access a subdirectory, select the file link in the Name column.

• When the current directory is a subdirectory , you can select Up to switch to the parent directory.

9 To end the SMB/CIFS session, select Logout.

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Working with the web portal Launching web portal applications

To add a VNC connection and start a VNC session

1 Select Add Bookmark. 2 In the Title field, type a name to represent the connection. 3 From the Application Type list, select VNC. 4 In the Host Name/IP field, type the IP address of the VNC host (for example,

10.10.10.10/).

5 Select OK. 6 To start a VNC session, select the hyperlink that you created. 7 When you are prompted to log in to the remote host, type your user name and

password. You must have a user account on the remote host to log in.

8 Select OK. 9 To end the VNC session, select Disconnect.

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Launching web portal applications Working with the web portal

To add a RDP connection and start a RDP session

Note: You can specify a keyboard layout setting as a parameter when setting up the RDP connection. The format to enter the setting in “RDP to Host” is:

• “yourserver.com -m fr”

where ‘fr’ selects French as the Windows environment. Select the code that matches your local installation of Windows - for example, if your local machine has the Turkish version of Windows installed, select ‘tr’, regardless of the version of Windows installed on the server you connect to.

The codes are as follows:

• ar: Arabic

• da: Danish

• de: German

• en-bg: English, Great Britain

• en-us: English, US

• es: Spanish

• fi: Finnish

• fr: French

• fr-be: French, Belgian

• hr: Croatian

• it: Italian

• ja: Japanese

• lt: Lithuanian

• lv: Latvian

• mk: Macedonian

• no: Norwegian

• pl: Polish

• pt: Portuguese

• pt-br: Brazilian Portuguese

• ru: Russian

• sl: Slovenian

• sv: Sudanese

• tk: Turkmen

• tr: Turkish

1 Select Add Bookmark. 2 In the Title field, type a name to represent the connection. 3 From the Application Type list, select RDP. 4 In the Shared File Folder field, type the IP address of the RDP host (for example,

10.10.10.10).

5 Select OK.

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Working with the web portal Launching web portal applications

6 To start a RDP session, select the hyperlink that you created.

Note: The FortiGate unit may offer you its self-signed security certificate. Select Yes to

7 When you see a screen configuration dialog, click OK.

8 When you are prompted to log in to the remote host, type your user name and

password. You must have a user account on the remote host to log in.

9 Select Login.

10 To end the RDP session, select Logout.

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Launching web portal applications Working with the web portal

To add a SSH connection and start a SSH session

1 Select Add Bookmark. 2 In the Title field, type a name to represent the connection. 3 From the Application Type list, select SSH. 4 In the Host Name/IP field, type the IP address of the SSH host (for example,

192.168.1.3).

5 Select OK. 6 To start a SSH session, select the hyper link th at you cr ea te d.

Note: The FortiGate unit may offer you its self-signed security certificate. Select Yes to

7 Select Connect.

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Working with the web portal Launching web portal applications

8 A SSH session starts and you are prompted to log in to the remote host. You must

have a user account to log in. After you log in, you may enter any series of valid commands at the system prompt.

9 To end the session, select Disconnect (or type exit) and then close the SSH

connection window.

See also

• Connecting to the FortiGate unit

• Web portal home page features

• Launching web portal applications

• Starting a session from the Tools area

• Tunnel-mode features

• Logging out

• Adding a bookmark to the My Bookmarks list

• URL re-writing

• Working with the ActiveX/Java Platform plug-in

• Uninstalling the ActiveX/Java Platform plugin

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Starting a session from the Tools area Working with the web portal

Starting a session from the Tools area

You can connect to any web server or telnet server without adding a bookmark to the My Bookmarks list. The fields in the Tools area enable you to specify the URL or IP address of the host computer. If required, you can ping a host computer behind the FortiGate unit to verify connectivity to that host.

To connect to a web server from the Tools area

1 In the Connect to Web Server field, type the URL of the web server (for example,

http://www.mywebexample.com or https://172.20.120.101).

2 Select Go.

The FortiGate unit replaces the URL with https://<FG_IP_address>:<port_no>/proxy/http/<specified_URL> an d the requested page is displayed.

3 To end the session, close the browser window.

To ping a host or server behind the FortiGate unit

1 In the Test for Reachability (Ping) field, type the IP address of the host or server

that you want to reach (for example, 192.168.12.22).

2 Select Go.

A message stating whether the IP address can be reached or not is displayed.

To start a telnet session from the Tools area

1 In the Telnet to Host field, type the IP address of the telne t host (for example,

192.168.5.238).

2 Select Go.

Note: The FortiGate unit may offer you its self-signed security certificate. Select Yes to

3 Select Connect. 4 A telnet session starts and you are prompted to log in to the remote host. You

must have a user account to log in. After you log in, you may enter any series of valid telnet commands at the system prompt.

5 To end the session, select Disconnect (or type exit) and then close the TELNET

connection window.

Tunnel-mode features

The FortiGate SSL VPN Remote Access Web Portal page is displayed after you log in. Selecting the Activate SSL-VPN Tunnel Mode link at the top of the home page displays the Fortinet SSL VPN Client area.

If your user account permits tunnel-mode connections, you can install/uninstall SSL VPN client software and/or initiate an SSL VPN tunnel with the FortiGate unit. (see Figure 25)For more information, see “Working with the Activ eX/Java Plat form

plug-in”.

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Working with the web portal Tunnel-mode features

Figure 25: Fortinet SSL VPN Client 1.0 page (tunnel mode)

Link Status The state of the SSL VPN tunnel:

• Up is displayed when an SSL VPN tunnel with the FortiGate

unit has been established.

• Down is displayed when a tunnel connection has not been initiated.

Bytes Sent The number of bytes of data transmitted from the client to the

Bytes Received The number of bytes of data received by the client from the

Install Download the SSL VPN client software from the FortiGate unit

Uninstall Uninstall the ActiveX/Java Platform plugin. Connect Initiate a session and establish an SSL VPN tunnel with the

Disconnect End the session and close the tunnel to the FortiGate unit. Refresh Now Refresh the Fortinet SSL VPN Client page.

FortiGate unit since the tunnel was established.

and add the ActiveX/Java Platform plugin to the local web browser.

FortiGate unit.

Working with the ActiveX/Java Platform plug-in

The ActiveX/Java Platform plug-ins provide the sof tware that you r client computer needs to establish an SSL VPN tunnel with the FortiGate unit. Y ou have to download the ActiveX/Java Platform plugin from the FortiGate unit and install the plugin on your client computer before your computer can establish a VPN tunnel with the FortiGate unit. Controls for downloading and installing the ActiveX/Java Platform plug-ins are displayed in the Fortinet SSL VPN Client area of the web portal.

You only have to install the ActiveX/Java Platform plug-ins once. Afterwa rd, you can use the SSL VPN client software to initiate a VPN tunnel with the FortiGate unit whenever you access the web portal.

Note: On your web browser, ensure that the security settings associated with the Internet zone permit you to download and run ActiveX/Java Platform controls. You must also have administrator rights on your comp ut er to install the ActiveX/Java Platform controls.

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Tunnel-mode features Working with the web portal

To download and install the ActiveX/Java Platform plugin

1 At the top of the web portal home page, select the Activate SSL-VPN Tunnel

Mode link.

2 The FortiGate unit may prompt you to install a Fortinet SSL VPN Client plugin.

Follow the instructions provided to install ActiveX or Java Platform.

Note: With Windows XP Service Pack 2, a yellow bar is displayed at the top of the screen. You must click on the bar (accept) and follow the instructions to install the ActiveX control.

The Fortinet SSL VPN Client 1.0 page is displayed.

3 Select Install.

To initiate a VPN tunnel with the FortiGate unit

The IP address of the public FortiGate interface and the TCP port number through which SSL VPN connections are made are displa yed in the Ser ver IP field of the Fortinet SSL VPN Client page.

1 At the top of the web portal home page, select the Activate SSL-VPN Tunnel

Mode link.

The Fortinet SSL VPN Client page opens.

Note: If client security checks are configured for your account, they must complete successfully before the Connect button is enabled.

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Working with the web portal Logging out

Logout

2 Select Connect.

Figure 26: Tunnel established

After the “Fortinet SSL VPN client connected to server” message is displayed and the Disconnect button is enabled (see Figure 26), you have direct access to the network behind the FortiGate unit, subject to the conditions of the FortiGate firewall policy . For example, using a client application on your computer , yo u could connect to a server application on the network behind the FortiGate unit and download information.

Uninstalling the ActiveX/Java Platform plugin

Logging out

To stop the SSL VPN session and disconnect from the FortiGate unit, select Disconnect. Y o u must log out from the web port al to disconnect from the FortiGate unit (see “Logging out”). You can use the Connect button to re-establish the tunnel.

To uninstall the ActiveX/Java Platform plugin

Note: You do not have to uninstall the SSL VPN client software if you wish to install an

updated version. If the FortiGate unit has a newer version of the ActiveX/Java Platform plugin, it will install it automatically.

1 At the top of the web portal home page, select the Activate SSL-VPN Tunnel

Mode link.

2 Select Uninstall.

To log out from the web portal, select the Logout button in the top right corner of the web portal home page.

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Logging out Working with the web portal

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Index

ActiveX plugin

downloading 81

uninstalling 83 applications, web-portal 68 authentication timeout setting 40

bookmarks

user-defined 69

certificates

allow group certificate 47

self signed 65

X.509 20 cifs session, establishing 73 cipher suite, SSL negotiations 39 client

Linux 28

MacOS 32

standalone 24

uninstalling Linux 32

uninstalling MacOS 35

uninstalling Windows 27

using Linux 31

using MacOS 34

using Windows 27

Windows 25 client requirements

tunnel mode 18

web-only mode 16 comments, documentation 12 configuration, general steps 20 configuring

SSL VPN client 20 connecting

to ftp server 72

to secure HTTP gateway 65

to telnet server 71, 78, 80

to web portal 66

to web server 24, 70, 80

to web-based manager 36 connections

defining bookmarks to 69

enabling SSL VPN 36 connectivity, testing for 24, 80 customer service 12

deployment topology 19

documentation

commenting on 12 Fortinet 9

downloading

Linux client 28 MacOS client 32 Windows client 25

establishing cifs session 73 establishing ftp session 72 establishing rdp session 76 establishing smb session 73 establishing vnc session 75

firewall policy

tunnel-mode access 48 web-only mode access 46

FortiGate documentation

commenting on 12 Fortinet customer service 12 Fortinet documentation 9 Fortinet Knowledge Center 11 Fortinet SSL VPN Client area 80, 82 ftp server, connecting to 72 ftp session, establishing 72

home page, web portal features 66 host check

OS 56 host OS

patch check 56

idle timeout setting 40 infrastructure requirements 19

overall 19

tunnel-mode clients 18

web-only mode clients 16 introduction

deployment topology 18

FortiGate SSL VPN technology 7

Fortinet documentation 9

general configuration steps 20

tunnel mode 7

web-only mode 7 IP address range, tunnel mode 38 IPSec VPN

comparison to SSL 13

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Index

keyboard setting, rdp 76

logging

filtering SSL VPN events 51 setting event-logging parameters 50 viewing SSL VPN event logs 51

logging in

to FortiGate secure HTTP gateway 65

logging out

from web portal page 83

modes of operation 7, 15

tunnel mode 17 web-only mode 15

My Bookmarks list 69

network configuration 19

recommended 18

obfuscation 68 OS

host patch check 56

patch check

host OS 56 ping host from remote client 24, 80 port number

for web-portal connections 38

rdp keyboard setting 76 rdp session, establishing 76 redirection, to popup window 40 replacement message, to customize web portal login page 41

security certificate

allow group certificate 47 sessions, monitoring 51 smb session, establishing 73 split tunneling 7 SSL VPN

bookmark 52

bookmark group 54

checking client certificates 37

comparison to IPSec VPN 13

configuration overview 20

configuring client 20

deployment topology 18

downloading client software 81

downloading Linux client 28 downloading MacOS client 32 downloading Windows client 25 enabling connections 36 event logging 50 host OS patch check 56 introduction to FortiGate 7 modes of operation 7 monitoring sessions 51 setting the cipher suite 37 specifying server certificate 37 specifying timeout values 38 split tunneling 7 standalone client 24 tunnel IP range 37 tunnel-mode user groups 57 uninstalling Linux client 32 uninstalling MacOS client 35 uninstalling Windows client 27 using Linux client 31 using MacOS client 34 using Windows client 27

SSL VPN client

installing 81 uninstalling 83

SSL VPN Virtual Desktop 21

downloading 21 running 21 using 21

technical support 12 telnet server, connecting to 71, 78, 80 telnet session, starting 71, 78 Tools area 68, 80 tunnel mode 17

client requirements 18 configuring FortiGate server 48 firewall policy for 48 Fortinet SSL VPN Client area 80, 82 introduction 7 IP address range 38 user group, unique access permissions 57 web portal features 80

tunnel, initiating 82

unique access permissions

configuring user groups 57 granting 57 SSL VPN tunnel mode 57

URL

for user log in 65 URL obfuscation 68 URL re-writing 68 user accounts, creating 42 user groups

configuring SSL VPN tunnel-mode 57

creating unique access permissions 57 user groups, creating 42

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Index

Virtual Desktop 21

downloading 21 running 21

using 21 vnc session, establishing 75 VPN tunnel, initiating 82

web portal 69

adding caption to home page 40

applications 68

customizing login page 41

Fortinet SSL VPN Client area 80, 82

home page features 66

redirecting to popup window 40 setting login page port number 38 Tools area 68 tunnel mode features 80

web server

connecting to 24, 70, 80

web-based manager

connecting to 36

web-only mode 15

client requirements 16 firewall policy for 46 introduction 7

X.509 security certificates 39

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Index

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www.fortinet.com

Fortinet FORTIOS MR7 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Introduction

About FortiGate SSL VPN

About this document

Document conventions

Typographic conventions

FortiGate documentation

Related documentation

FortiManager documentation

FortiClient documentation

FortiMail documentation

FortiAnalyzer documentation

Fortinet Tools and Documentation CD

Fortinet Knowledge Center

Comments on Fortinet technical documentation

Customer service and technical support

Configuring a FortiGate SSL VPN

Comparison of SSL and IPSec VPN technology

Legacy versus web-enabled applications

Authentication differences

Connectivity considerations

Relative ease of use

Client software requirements

Access control

Session failover support

SSL VPN modes of operation

Web-only mode

Web-only mode client requirements

Tunnel mode

Tunnel-mode client requirements

Topology

Infrastructure requirements

Configuration overview

Configuring the SSL VPN client

SSL VPN Virtual Desktop application.

Using the SSL VPN Virtual Desktop

Using the SSL VPN standalone tunnel clients

Configuring SSL VPN settings

Enabling SSL VPN connections and editing SSL VPN settings

Specifying a port number for web portal connections

Specifying an IP address range for tunnel-mode clients

Enabling strong authentication through security certificates

Specifying the cipher suite for SSL negotiations

Setting the idle timeout setting

Setting the client authentication timeout setting

Adding a custom caption to the web portal home page

Adding WINS and DNS services for clients

Redirecting a user group to a popup window

Customizing the web portal login page

Configuring user accounts and SSL VPN user groups

Configuring firewall policies

Configuring firewall addresses

Configuring Web-only firewall policies

Configuring tunnel-mode firewall policies

Configuring SSL VPN event-logging

Monitoring active SSL VPN sessions

Configuring SSL VPN bookmarks and bookmark groups

Viewing the SSL VPN bookmark list

Configuring SSL VPN bookmarks

Viewing the SSL VPN Bookmark Groups list

Configuring SSL VPN bookmark groups

Assigning SSL VPN bookmark groups to SSL VPN users

SSL VPN host OS patch check

Configuration Example

Granting unique access permissions for SSL VPN tunnel user groups

Sample configuration for unique access permissions with tunnel mode user groups

SSL VPN virtual interface (ssl.root)

SSL VPN dropping connections

Working with the web portal

Connecting to the FortiGate unit

Web portal home page features

Launching web portal applications

URL re-writing

Adding a bookmark to the My Bookmarks list

Starting a session from the Tools area

Tunnel-mode features