Installation Guide
Strong authentication for Cisco ASA
5500 Clientless SSL VPN and Cisco
VPN Client
Solutions with
One Time Password Server
The complete installation guide for securing the authentication to your Cisco ASA
5500 solution with Nordic Edge One Time Password Server, delivering two-factor
authentication via SMS to your mobile phone. For both clientless SSL VPN and Cisco
VPN Client.
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Installation Guide
Content
1 SUMMARY ...................................................................................................................................... 4
2 PREREQUISITES ........................................................................................................................... 4
3 IMPORTANT INFORMATION REGARDING COMMUNICATION ................................................. 4
4 GETTING STARTED ....................................................................................................................... 5
4.1 1.1 Download the software ....................................................................................................... 5
4.2 Register and download the software ....................................................................................... 6
5 INSTALLATION .............................................................................................................................. 9
5.1 Start the installation .................................................................................................................. 9
5.2 Installing license ...................................................................................................................... 11
6 CONFIGURING THE ONE TIME PASSWORD SERVER ............................................................ 15
6.1 Start the OTP Configuration ................................................................................................... 15
6.2 Server page .............................................................................................................................. 16
6.3 Plugin manager page .............................................................................................................. 17
6.3.1 Nordic Edge SMS Plugin ................................................................................................... 18
6.4 Nordic Edge SMS Page ........................................................................................................... 19
6.5 Radius & Client page ............................................................................................................... 20
6.5.1 Enable Radius ................................................................................................................... 21
6.6 Add client ................................................................................................................................. 22
6.7 Configure LDAP ....................................................................................................................... 23
6.7.1 Test LDAP Connection ...................................................................................................... 23
6.7.2 Selecting Search Base DN ................................................................................................ 25
6.7.3 Select Search filter ............................................................................................................ 27
6.7.4 Test LDAP Authentication ................................................................................................. 29
7 START THE ONE TIME PASSWORD SERVER .......................................................................... 31
8 ADD MOBILE PHONE NUMBER WITH MICROSOFT MANAGEMENT CONSOLE .................. 32
9 CONFIGURING ASA5500 FOR SSL VPN AUTHENTICATION WITH NORDIC EDGE ONE TIME
PASSWORD SERVER .......................................................................................................................... 33
9.1 Start ASA device manager ...................................................................................................... 33
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9.2 Browse to Configuration, Remote Access VPN, AAA/Local Users, AAA Server Groups
and click Add. ...................................................................................................................................... 33
9.3 Name Server Group OTPserver, choose protocol RADIUS ................................................ 34
9.4 Add new radius server to the RADIUS group ....................................................................... 35
9.5 Configure Radius Server : Interface name, IP address to OTPserver and the pre-shared
key between the One Time Password server and Cisco ASA5500. ............................................... 35
9.6 Create a ”test” connection profile (in case you want to test this for certain users only).
37
9.6.1 Browse to Configuration/Remote Access/Clientless SSL VPN Access/Connection Profiles
and click Add ..................................................................................................................................... 37
9.6.2 Specify Connection Profile Name ...................................................................................... 38
9.6.3 Specify AAA Server Group = OTPserver ......................................................................... 38
9.6.4 Edit Connection Profile Clientless SSL VPN Settings ....................................................... 40
9.6.5 Add Alias if user should be able to select authentication method by drop-down-list ........ 40
9.6.6 Edit Connection Profile Clientless SSL VPN Settings ....................................................... 41
9.6.7 Add Group URL if user should be able to select authentication by specifying URL ......... 41
9.6.8 If user should be allowed to select authentication method by drop-down-list, .................. 41
9.6.9 select this item. .................................................................................................................. 41
10 CONFIGURING ASA5500 FOR CISCO VPN CLIENT AUTHENTICATION WITH NORDIC
EDGE OTP SERVER ............................................................................................................................ 45
10.1 Add a new ( or Edit an existing) Cisco VPN Client Connection Profile to use the
OTPserver............................................................................................................................................. 45
10.2 At the Cisco VPN Client, create an entry with correct name and password ..................... 46
Name must match the connection profile name at previous slide. ........................................ 46
Password must match the pre-shared key in ASA5500. ......................................................... 46
(Note : This can be distributed via MSI installation) ........................................................................ 46
11 START TESTING ...................................................................................................................... 47
11.1 Enter your Userid and password as usual ............................................................................ 47
11.2 You will receive a one-time password to your mobile phone within a couple of seconds.
47
11.3 Enter your one time password and click on “OK”. .............................................................. 48
12 PURCHASE ............................................................................................................................... 49
13 TECHNICAL QUESTIONS ........................................................................................................ 49
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Installation Guide
1 Summary
This is the complete installation guide for securing the authentication to your Cisco ASA 5500 solution
with Nordic Edge One Time Password Server, delivering two-factor authentication via SMS to your
mobile phone. For both clientless SSL VPN and Cisco VPN Client. You will be able to test the product
with your existing Cisco ASA 500 and LDAP user database, without making any changes that affect
existing users. The guide will also allow you to make the complete installation effeciently, using a
maximum of 1 hour. Nordic Edge provides several methods for delivering one time passwords, like email, tokens, mobile clients, prefetch etc. - however in this test we are only going to use SMS.
This is a step-by-step guide that covers the entire installation from A to Z. It is based on the scenario
that you are running your Cisco 5500 solution against Active Directory, and that you install the One
Time Password Server on a Windows Server. The One Time Password Server is platform
independent and works with all other LDAP user databases, like eDirectory, Sun One, Open LDAP
etc. If you are not running Active Directory or Windows and if you have any questions regarding the
slight differences in the installation process, you are most welcome to contact us at
support@nordicedge.se and we will take you through the entire proces s.
2 Prerequisites
You will need to have a server available, for example a VMware virtual machine with Windows Server
2003 installed with Ethernet in bridge mode. The server needs to have an ip-address configured and
must also be able to reach your DNS-servers, your Cisco 5500 ASA solution and the Active Directory.
Since the software is quite small and easy to remove, you can also use any existing server in your
network.
3 Important information regarding communication
The One Time Password Server is a software that you can place on any server in your internal
network or DMZ.
- The One Time Password Server needs to be able to communicate (Outbound traffic) with your
LDAP or JDBC User Database. Default port for LDAP and Secure LDAP is TCP port 389 / 636.
- The Integration Module needs to be able to communicate (Outbound traffic) with the One Time
Password Server on TCP port 3100. Or Radius with UDP port 1812 or 1645 (Outbound traffic)
- If you want to use the
able to communicate (Outbound traffic) with otp.nordicedge.net and otp.nordicedge.se with HTTPS on
TCP port 443.
In this test-scenario you will want to communicate with RADIUS port 1812 or 1645 and use
our Nordic Edge SMS Gateway.
Nordic Edge SMS Gateway, the One Time Password Server needs to be
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4 Getting started
4.1 1.1 Download the software
Go to www.nordicedge.se and click on Download
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4.2 Register and download the software
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You will receive a link for downloading the software.
when you download the software.
Download the version with JAVA included.
A 30 days evaluation license will be sent via e-mail
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5 Installation
5.1 Start the installation
Start the installation on the server where you want to install the One Time Password Server
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5.2 Installing license
Choose the license.dat that you have received via e-mail. This is important, since if you want to
request a demo SMS account at Nordic Edge later in the installation, you need to install the license at
this moment.
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Note, if you are in a test-phase, we recommend that you do not install the OTP-Server as a Windows
Service.
.
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6 Configuring the One Time Password Server
6.1 Start the OTP Configuration
Start the OTP Configurator by clicking on Programs / NordicEdge / OTP Configurator
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6.2 Server page
On the Server page you can set the length of the one-time password and for how long it should be
valid. Default is 5 minutes.
You can also set a default country prefix, which means that you will not need to state it in the mobile
attribute.
The One Time Password communicates with TCP protocol portnr 3100.
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6.3 Plugin manager page
On the Plugin manager page you can configure all methods and in which order you want to use them.
In this case we will be using Nordic Edge SMS gateway to deliver the one-time password via SMS to
your mobile phone.
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6.3.1 Nordic Edge SMS Plugin
Move the Plugin Nordic Edge SMS to the top of the plugins.
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6.4 Nordic Edge SMS Page
Look at the Nordic Edge SMS Page. If you installed the license.dat during the installation and checked
the box "Request a demo SMS account at Nordic Edge", an account should now be preconfigured for
you.
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6.5 Radius & Client page
For configuring One Time Passwords Server to act as radius server go to the Radius & Client page.
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6.5.1 Enable Radius
Enable Radius and choose one of the radius ports 1645 or 1812 that you want to use. Make sure that
the client (Cisco 5500 ASA) is using the same radius port.
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6.6 Add client
Click on Add Client and enter Client Display name and the ip-address for the Cisco 5500 ASA. Please
note that you should not use the hostname here.
Make sure that “Is RADIUS” is checked and enter the correct Shared Secret.
In the category User Database (s) click New.
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6.7 Configure LDAP
Enter a Database Display Name and the host address for your LDAP user database. In this case we
are using Microsoft Active Directory with SSL and the users’ mobile attribute for sending one time
passwords.
6.7.1 Test LDAP Connection
Click on Test LDAP Connection and make sure that you get an LDAP Connection Success.
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6.7.2 Selecting Search Base DN
Click on the box for selecting Search Base DN:
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Select a Base Dn where your users are.
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6.7.3 Select Search filter
Click on samples and select the right filter for your LDAP User database, in this case Active Directory.
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6.7.4 Test LDAP Authentication
Click on Test LDAP Authentication and make sure you can authenticate.
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Exit the configurator by clicking OK twice and make sure to click on the Save button
End of Step “Configuring the One Time Password Server”
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7 Start the One Time Password Server
Start the One Time Password by going to Program folder, NordicEdge,OTPServer and klick on OTP
Server
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8 Add mobile phone number with Microsoft Management Console
Add mobile phone number to your test users mobile phone attribute
Start MMC and select the user that you want to use for testing and enter the mobile phone number in
the Mobile attribute.
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9 Configuring ASA5500 for SSL VPN authentication with Nordic
Edge One Time Password Server
9.1 Start ASA device manager
9.2 Browse to Configuration, Remote Access VPN, AAA/Local Users, AAA Server Groups and click Add.
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9.3 Name Server Group OTPserver, choose protocol RADIUS
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9.4 Add new radius server to the RADIUS group
9.5 Configure Radius Server : Interface name, IP address to OTPserver and the pre-shared key between the One Time Password server and Cisco ASA5500.
Ensure you use the same radius ports in both OTPserver ASA5500.
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You have now configured a group ”OTPserver” and defined a Radius Server in
this group.
This group can now be used as an authentication method.
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9.6 Create a ”test” connection profile (in case you want to test this for certain users only).
9.6.1 Browse to Configuration/Remote Access/Clientless SSL VPN
Access/Connection Profiles and click Add
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9.6.2 Specify Connection Profile Name
9.6.3 Specify AAA Server Group = OTPserver
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9.6.4 Edit Connection Profile Clientless SSL VPN Settings
9.6.5 Add Alias if user should be able to select authentication method by drop-
down-list
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9.6.6 Edit Connection Profile Clientless SSL VPN Settings
9.6.7 Add Group URL if user should be able to select authentication by
specifying URL
9.6.8 If user should be allowed to select authentication method by drop-down-
list,
9.6.9 select this item.
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Login successful, the user will now get to his portal, which can
be customized depending on Active Directory membership, PC health status
( antivirus , hotfix etc ) and authentication method
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10 Configuring ASA5500 for Cisco VPN Client authentication with
Nordic Edge OTP Server
10.1 Add a new ( or Edit an existing) Cisco VPN Client Connection Profile to use the OTPserver
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10.2 At the Cisco VPN Client, create an entry with correct name and password
• Name must match the connection profile name at previous slide.
• Password must match the pre-shared key in ASA5500.
(Note : This can be distributed via MSI installation)
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11 Start testing
11.1 Enter your Userid and password as usual
11.2 You will receive a one-time password to your mobile phone within a couple of seconds.
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11.3 Enter your one time password and click on “OK”.
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12 Purchase
If you want to purchase the product, you are more than welcome to contact us at
sales@nordicedge.se
of users.
and we will send you an offer. Please note that the price will depend on number
13 Technical questions
If you have any technical questions, please contact us at support@nordicedge.se ---
Thank you for showing interest in our product
The Nordic Edge One Time Password Server Team
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