VoIP Status.......................................................................................................................................... 22
IP Alias............................................................................................................................................ 29
ROBLEMS STARTING UP THE ROUTER.................................................................................................... 101
P
ROBLEMS WITH THE LAN INTERFACE.................................................................................................. 101
APPENDIX A: PRODUCT SUPPORT AND CONTACT INFORMATION .................................... 102
Table of Contents iii
VoIP/(802.11g) Broadband Firewall Router
Chapter 1: Introduction
Introduction to your Router
Welcome to the VoIP Broadband Firewall Router. The router is an “all-in-one” VoIP Broadband router,
combining a Broadband router, Ethernet network switch and 2 ports for Voice over IP functionalities,
providing everything you need to get the machines on your network connected to the Internet over your
DSL/Cable broadband connection. With features such as a Quick-S tart wizard and DHCP Server, you can
be online in no time at all and with a minimum of fuss and configuration, catering for first-time users to the
guru requiring advanced features and control over their Internet connection and network.
Features
Voice over IP compliance with SIP standard
The router supports cost-effective, toll-quality voice calls over the Internet. It complies with the most
popular industrial standard, SIP protocol, to ensure the interoperability with SIP devices and major
VoIP Gateways. The VoIP router supports call waiting, silence suppression, voice activity detection
(VAD), comfort noise generation (CNG), line echo cancellation, caller ID (Bell 202, V3) and so on.
Fixed-Line Support
The router integrates RJ-11 FXO port for inbound and outbound calls transmitted through PSTN.
Users can receive phone calls from PSTN while enjoying VoIP call service at the same time. In
addition, the device automatically fallbacks to lifeline POTS to enable making normal phone calls
when there is power outage, or when the Internet connection is down.
802.11g Wireless AP with WPA Support
With integrated 802.11g Wireless Access Point in the router, the device offers a quick and easy
access among wired network, wireless network and broadband connection (ADSL) with single
device simplicity, and as a result, mobility to the users. In addition to 54 Mbps 802.11g data rate, it
also interoperates backward with existing 802.11b equipment. The Wireless Protected Access
(WPA1 and WAP2) and Wireless Encryption Protocol (WEP) supported features enhance the
security level of data protection and access control via Wireless LAN.
Fast Ethernet Switch
A 4-port 10/100Mbps fast Ethernet switch is built in with automatic switching between MDI and
MDI-X for 10Base-T and 100Base-TX ports. An Ethernet straight or crossover cable can be used
directly for auto detection.
Multi-Protocol to establish a connection
It supports PPP over Ethernet (RFC 2516), DHCP (Obtain an IP Address Automatically), and Static
IP (Fixed IP Address) to establish a connection with the ISP. The product also supports VC-based
and LLC-based multiplexing.
Quick Installation Wizard
It supports a WEB GUI page to install this device quickly. With this wizard, end users can enter the
information easily which they get from their ISP, then surf the Internet immediately.
Universal Plug and Play (UPnP) and UPnP NAT Traversal
This protocol is used to enable simple and robust connectivity among stand-alone devices and
PCs from many different vendors. It makes network simple and affordable for users. UPnP
architecture leverages TCP/IP and the Web to enable seamless proximity networking in addition to
control and data transfer among networked devices. With this feature enabled, users can now
connect to Net meeting or MSN Messenger seamlessly.
Chapter 1: Introduction
3
VoIP/(802.11g) Broadband Firewall Router
Network Address Translation (NAT)
Allows multi-users to access outside resources such as the Internet simultaneously with one IP
address/one Internet access account. Many application layer gateway (ALG) are supported such as
web browser, ICQ, FTP, Telnet, E-mail, News, Net2phone, Ping, NetMeeting, IP phone and others.
SOHO Firewall Security with DoS and SPI
Along with the built-in NAT natural firewall feature, the router also provides advanced hacker
pattern-filtering protection. It can automatically detect and block Denial of Service (DoS) attacks.
The router is built with Stateful Packet Inspection (SPI) to determine if a data packet is allowed
through the firewall to the private LAN.
Domain Name System (DNS) relay
It provides an easy way to map the domain name (a friendly name for users such as
www.yahoo.com) and IP address. When a local machine sets its DNS server with this router’s IP
address, every DNS conversion request packet from the PC to this router will be forwarded to the
real DNS in the outside network.
Dynamic Domain Name System (DDNS)
The Dynamic DNS service allows you to alias a dynamic IP address to a static hostname. This
dynamic IP address is the WAN IP address. For example, to use the service, you must first apply for
an account from a DDNS service like http://www.dyndns.org/. More than 5 DDNS servers are
supported.
Quality of Service (QoS)
QoS gives you full control over which types of outgoing data traffic should be given priority by the
router, ensuring important data like gaming packets, customer information, or management
information move through the router ay lightning speed, even under heavy load. The QoS features
are configurable by source IP address, destination IP address, protocol, and port. You can throttle
the speed at which different types of outgoing data pass through the router, to ensure P2P users
don’t saturate upload bandwidth, or office browsing doesn’t bring client web serving to a halt. In
addition, or alternatively, you can simply change the priority of different types of upload data and let
the router sort out the actual speeds.
Virtual Server (“port forwarding”)
Users can specify some services to be visible from outside users. The router can detect incoming
service requests and forward either a single port or a range of ports to the specific local computer to
handle it. For example, a user can assign a PC in the LAN acting as a WEB server inside and
expose it to the outside network. Outside users can browse inside web servers directly while it is
protected by NAT. A DMZ host setting is also provided to a local computer exposed to the outside
network, Internet.
Rich Packet Filtering
Not only filters the packet based on IP address, but also base d on Port numbers. It will filter p acket s
from and to the Internet, and also provides a higher level of security control.
Dynamic Host Configuration Protocol (DHCP) client and server
In the WAN site, the DHCP client can get an IP address from the Internet Service Provider (ISP)
automatically. In the LAN site, the DHCP server can allocate a range of client IP addresses and
distribute them including IP address, subnet mask as well as DNS IP address to local computers. It
provides an easy way to manage the local IP network.
Static and RIP1/2 Routing
It has routing capability and supports easy static routing table or RIP1/2 routing protocol.
Simple Network Management Protocol (SNMP)
It is an easy way to remotely manage the router via SNMP.
Web based GUI
Chapter 1: Introduction
4
VoIP/(802.11g) Broadband Firewall Router
It supports web based GUI for configuration and management. It is user-friendly and comes with
on-line help. It also supports remote management capability for remote users to configure and
manage this product.
Firmware Upgradeable
Device can be upgraded to the latest firmware through the WEB based GUI.
Rich Management Interfaces
It supports flexible management interfaces with local console port, LAN port, and WAN port. Users
can use terminal applications through the console port to configure and manage the device, or
Telnet, WEB GUI, and SNMP through LAN or WAN ports to configure and manage the device.
Chapter 1: Introduction
5
r
A
Important note for using this router
Do not use this router in high humidity or high temperatures.
Do not use the same power source for this router as othe
equipment.
Warning
Do not open or repair the case yourself. If this router is too hot,
turn off the power immediately and have it repaired at a qualified
service center.
Avoid using this product and all accessories outdoors.
ttention
Place this router on a stable surface.
Only use the power adapter that comes with the package. Using
a different voltage rating power adaptor may damage this router.
Lit when connected to an ADSL modem or Cable modem's
Ethernet port well
Lit when connected to an Ethernet device.
Green for 100Mbps; Orange for 10Mbps.
Blinking when data is Transmitted / Received.
Lit green when the wireless connection is established.
Flashes when sending/receiving data.
Lit green when the phone is off-hook.
Lit when the inbound and outbound calls transmitted through
PSTN.
Lit when the SIP Registration is OK.
Green for Phone 1; Orange for Phone 2.
13 PPP
Lit Green when there is a PPPoE connection.
Chapter 2: Installing the router
7
The Rear Ports
The Ethernet Port # 3 can be used as a console port. You need a special
console tool which already includes in the package to connect with LAN
port 3 and PC’s RS-232 port (9-pin serial port).
Port Meaning
7
6
VoIP/(802.11g) Broadband Firewall Router
5
3
4
1
2
Power Switch
1
PWR
2
3 RESET
WAN
4
LAN
5
1X — 3X
(RJ-45 connector)
Power ON/OFF switch
Connect the supplied power adapter to this jack.
To be sure the device is being turned on press RESET
button for:
1-3 seconds: quick reset the device.
6 seconds above, and power off, power on the device:
restore to factory default settings. (Cannot login to the router
or forgot your Username/Password. Press the button for
more than 6 seconds).
Caution: After pressing the RESET button for more than 6 seconds,
to be sure you power cycle the device again.
WAN 10/100M Ethernet port (with auto crossover support);
connect xDSL/Cable modem here.
Connect a UTP Ethernet cable (Cat-5 or Cat-5e) to one of the
LAN ports when connecting to a PC or an office/home network
of 10Mbps or 100Mbps.
Caution: Port 3 can be either a LAN or Console port at a time but not
both.
Connect a UTP Ethernet cable (Cat-5 or Cat-5e) to one of the
Console Port (LAN port 3)
5
(RJ-45 connector)
Phone
1X — 2X
6
(RJ-11 connector)
Chapter 2: Installing the router
LAN ports when connecting to a PC or an office/home network
of 10Mbps or 100Mbps.
Caution: Port 3 can be either a LAN or Console port at a time but not
both.
Connect RJ-11 cable to this port when connecting to an analog
phone set.
8
VoIP/(802.11g) Broadband Firewall Router
7
LINE
Connect RJ-11 cable to this port when connecting to the
telephone wall jack.
Cabling
The most common problem associated with Ethernet is bad cabling. Make sure that all connected
devices are turned on. On the top of the product is a bank of LEDs, as a first check, verifies that the
relevant LAN Link and WAN Link LEDs are lit. If they are not, verify that you are using the proper cables.
Chapter 2: Installing the router
9
VoIP/(802.11g) Broadband Firewall Router
Chapter 3: Basic Installation
The router can be configured with your web browser. A web browser is included as a st andard application
in the following operating systems: Linux, Mac OS, Windows 98/NT/2000/XP/Me, etc. The product
provides an easy and user-friendly interface for configuration.
Please check your PC’s network components. The TCP/IP protocol stack and Ethernet network adapter
must be installed. If not, please refer to your Windows-related or other operating system manuals.
There are ways to connect with the router, either through an external repeater hub to the router or directly
connecting with PCs. However, to be sure PCs have an Ethernet interface installed properly prior to
connecting to the router device. You ought to configure your PCs to obtain an IP address through a
DHCP server or a fixed IP address that must be in the same subnet as the router. The default IP address
of the router is 192.168.1.254 and the subnet mask is 255.255.255.0 (i.e. any attached PC must be in the
same subnet, and have an IP address in the range of 192.168.1.1 to 192.168.1.253). The best and
easiest way is to configure the PC to get an IP address automatically from the router using DHCP. If you
encounter any problem accessing the router’s web interface it may also be advisable to uninstall any
kind of software firewall on your PCs, as they can cause problems accessing the 192.168.1.254 IP
address of the router. Users should make their own decisions on how to best protect their network.
Please follow the steps below for your PC’s network environment installation.
Any TCP/IP capable workstation can be used to communicate with or through
the router. To configure other types of workstations, please consult the
manufacturer’s documentation.
Chapter 3: Basic Installation
10
VoIP/(802.11g) Broadband Firewall Router
Connecting Your Router
1. (a) ATA Mode: Connect the ATA to a WAN (Connect to ADSL modem/router).
(b) Broadband Router Mode: Connect the Router to a LAN (Local Area Network) and WAN
(Connect to Cable or ADSL modem).
2. Power on the device.
3. Make sure the PWR and SYS LEDs are lit steadily and that the WAN and relevant LAN LED are lit.
4. Connect an RJ11 cable to VoIP port when connecting to an analog phone set.
5. Connect RJ-11 cable to LINE Port when connecting to the telephone wall jack.
ATA Mode
Broadband Router Mode
Chapter 3: Basic Installation
11
VoIP/(802.11g) Broadband Firewall Router
Configuring PCs in Windows in Window XP
1. Go to Start / Control Panel (in Classic View). In the Control
Panel, double-click Network Connections.
2. Double-click Local Area Connection. (See Figure 3.1)
3. In the LAN Area Connection Status window, click
Properties. (See Figure 3.2)
4. Select Internet Protocol (TCP/IP) and click Properties.
(See Figure 3.3)
5. Select the Obtain an IP address automatically and Obtain
DNS server address automatically radio buttons. (See
Figure 3.4)
6. Click OK to finish the configuration.
Figure 3.1: LAN Area Connection
Figure 3.2: LAN Connection Status
Figure 3.3: TCP / IP
Figure 3.4: IP Address & DNS
Configuration
Chapter 3: Basic Installation
12
VoIP/(802.11g) Broadband Firewall Router
Configuring PCs in Windows 2000
1. Go to Start / Settings / Control Panel. In the Control Panel,
double-click Network and Dial-up Connections.
2. Double-click Local Area (“LAN”) Connection. (See Figure
3.5)
3. In the LAN Area Connection Status window, click
Properties. (See Figure 3.6)
4. Select Internet Protocol (TCP/IP) and click Properties.
(See Figure 3.7)
5. Select the Obtain an IP address automatically and Obtain
DNS server address automatically radio buttons. (See
Figure 3.8)
6. Click OK to finish the configuration.
Figure 3.5: LAN Area Connection
Figure 3.6: LAN Connection Status
Figure 3.7: TCP / IP
Figure 3.8: IP Address & DNS
Configuration
Chapter 3: Basic Installation
13
VoIP/(802.11g) Broadband Firewall Router
Configuring PC in Windows 95/98/ME
1. Go to Start / Settings / Control Panel. In the Control Panel,
double-click Network and choose the Configuration tab.
2. Select TCP / IP -> NE2000 Compatible, or the name of any
Network Interface Card (NIC) in your PC. (See Figure 3.9)
3. Click Properties.
4. Select the IP Address tab. In this page, click the Obt ain an IP
address automatically radio button. (See Figure 3.10)
5. Then select the DNS Configuration tab. (See Figure 3.11)
6. Select the Disable DNS radio button and click OK to finish
the configuration.
Figure 3.9: TCP / IP
Figure 3.10: IP Address
Figure 3.11: DNS Configuration
Chapter 3: Basic Installation
14
VoIP/(802.11g) Broadband Firewall Router
Configuring PC in Windows NT4.0
1. Go to Start / Settings / Control Panel. In the Control
Panel, double-click Network and choose the Protocols tab.
2. Select TCP/IP Protocol and click Properties. (See Figure
3.12)
3. Select the Obtain an IP address from a DHCP server radio
button and click OK. (See Figure 3.13)
Figure 3.12: TCP / IP
Figure 3.13: IP Address
Chapter 3: Basic Installation
15
VoIP/(802.11g) Broadband Firewall Router
A
A
r
Factory Default Settings
Before configuring your, you need to know the following default settings.
Web Interface (Username and Password)
Username: admin Password: admin
The default username and password are “admin” and “admin” respectively.
ttention
ttention
Device LAN IP settings:
IP Address: 192.168.1.254
Subnet Mask: 255.255.255.0
If you ever forget the username/password to login to the router, you may
press the RESET button up to 6 seconds to restore the factory default
settings.
Caution: Af ter pressing the RESET button for more than 6 seconds, to be sure you powe
cycle the device again.
ISP setting in WAN site:
PPPoE
DHCP server
DHCP server is enabled. Start IP Address: 192.168.1.100
IP pool counts: 100
LAN and WAN Port Addresses
The parameters of LAN and WAN ports are pre-set in the factory. The default values are shown below.
LAN Port WAN Port
IP address
Subnet Mask
DHCP server function
IP addresses for
distribution to PCs
192.168.1.254
255.255.255.0
Enabled
100 IP addresses continuing from
192.168.1.100 through 192.168.1.199
The PPPoE function is enabled
to automatically get the WAN
port configuration from the ISP.
16
Chapter 3: Basic Installation
VoIP/(802.11g) Broadband Firewall Router
Information from your ISP
Before configuring this device, you have to check with your ISP (Internet Service Provider) to find out
what kind of service is provided such as DHCP (Obtain an IP Address Automatically, Static IP (Fixed IP
Address) and PPPoE.
Gather the information as illustrated in the following table and keep it for reference.
DHCP
(Obtain an IP
Address
Automatically)
Static IP
(Fixed IP Address)
PPPoE
Configure this WAN Interface to use DHCP client protocol to get an IP address
from your ISP automatically. Your ISP provides an IP address to the router
dynamically when logging in.
Configure this WAN interface with a specific IP address. This IP address
should be provided by your ISP.
PPPoE (PPP over Ethernet) is known as a dial-up DSL or cable service. It is
designed to integrate the broadband services into the current widely deployed,
easy-to-use, and low-cost dial-up-access networking infrastructure.
Chapter 3: Basic Installation
17
VoIP/(802.11g) Broadband Firewall Router
Configuring with your Web Browser
Open your web browser, enter the IP address of your router, which by default is 192.168.1.254, and click
“Go”, a user name and password window prompt will appear. The default username and password are “admin” and “admin” respectively. (See Figure 3.14)
Figure 3.14: User name & Password Prompt Widonw
Congratulation! You are now successfully logon to the VoIP/(802.11g) Broadband Router!
Chapter 3: Basic Installation
18
VoIP/(802.11g) Broadband Firewall Router
Chapter 4: Configuration
At the configuration homepage, the left navigation pane where bookmarks are provided links you directly
to the desired setup page, including:
Status
-
ARP Table
-
Wireless Association T able (Wireless Router Only)
-
Routing Table
-
DHCP Table
-
Email Status
-
VoIP Status
-
Event Log
-
Error Log
-
NAT Sessions
-
Diagnostic
UPnP Portmap
-
ATA / Router Mode
Configuration
-
LAN
-
System
-
Firewall
-
VoIP
-
QoS
-
Virtual Server
-
Time Schedule
Advanced
-
Save Config to FLASH
Language (provides user interface in English and French languages).
Logout
Please click the links to see the relevant sections of this manual for detailed instructions on how to
configure the VoIP/(802.11g) Broadband Router.
Chapter 4: Configuration
19
VoIP/(802.11g) Broadband Firewall Router
Status
ARP Table
This section displays the router’s ARP (Address Resolution Protocol) Table, which shows the mapping of
Internet (IP) addresses to Ethernet (MAC) addresses. This is useful as a quick way of determining the
MAC address of the network interface of your PCs to use with the router’s Firewall – MAC Address
Filter function. See the Firewall section of this manual for more information on this feature.
IP Address: A list of IP addresses of devices on your LAN (Local Area Network).
MAC Address: The MAC (Media Access Control) addresses for each device on your LAN.
Interface: The interface name (on the router) that this IP Address connects to.
Static: Static status of the ARP table entry:
“no” for dynamically-generated ARP table entries
“yes” for static ARP table entries added by the user
Wireless Association Table (Wireless Router Only)
IP Address: It is IP address of wireless client that joins this network.
MAC: the MAC address of wireless client.
Routing Table
Routing Table
Valid: It indicates a successful routing status.
Destination: The IP address of the destination network.
Netmask: The destination netmask address.
Gateway/Interface: The IP address of the gateway or existing interface that this route will use.
Chapter 4: Configuration
20
Cost: The number of hops counted as the cost of the route.
VoIP/(802.11g) Broadband Firewall Router
RIP Routing Table
Destination: The IP address of the destination network.
Netmask: The destination netmask address.
Gateway: The IP address of the gateway that this route will use.
Cost: The number of hops counted as the cost of the route.
DHCP Table
Leased: The DHCP assigned IP addresses information.
IP Address: A list of IP addresses of devices on your LAN (Local Area Network).
Expired: The expired IP addresses information.
Permanent: The fixed host mapping information
Leased Table
IP Address: The IP address that assigned to client.
MAC Address: The MAC address of client.
Client Host Name: The Host Name (Computer Name) of client.
Expiry: The current lease time of client.
Expired Table
Please refer the Leased Table.
Permanent Table
Name: The name you assigned to the Permanent configuration.
IP Address: The fixed IP address for the specify client.
MAC Address: The MAC Address that you want to assign the fixed IP address
Maximum Lease Time: The maximum lease time interval you allow to clients
Chapter 4: Configuration
21
VoIP/(802.11g) Broadband Firewall Router
Email Status
Details and status for the Email Account you have configured the router to check. Please see the
Advanced section of this manual for details on this function.
VoIP Status
Here you can check details and status of VoIP Account you have configured. Please see the VoI P
Configuration section for more details.
Chapter 4: Configuration
22
VoIP/(802.11g) Broadband Firewall Router
Event Log
This page displays the router’s Event Log entries. Major events are logged to this window, such as when
the router’s ADSL connection is disconnected, as well as Firewall events when you have enabled
Intrusion or Blocking Logging in the Configuration – Firewall section of the interface. Please see the
Firewall section of this manual for more details on how to enable Firewall logging.
Error Log
Any errors encountered by the router (e.g. invalid names given to entries) are logged to this window.
Chapter 4: Configuration
23
VoIP/(802.11g) Broadband Firewall Router
NAT Sessions
This section lists all current NAT sessions between interface of types external (WAN) and internal (LAN).
Diagnostic
It tests the connection to computer(s) which is connected to LAN ports and also the WAN Internet
connection. If PING
PC’s DNS settings is set correctly.
www.google.com is shown FAIL and the rest is PASS, you ought to check your
Chapter 4: Configuration
24
VoIP/(802.11g) Broadband Firewall Router
UPnP Portmap
The section lists all port-mapping established using UPnP (Universal Plug and Play). Please see the
Advanced section of this manual for more details on UPnP and the router’s UPnP configuration options.
Chapter 4: Configuration
25
ATA / Router Mode
VoIP/(802.11g) Broadband Firewall Router
You have the option to configure the device to a pure Analog Telephone Adaptor (ATA); doing so, you will
lose the access capability to other feature functions such as Firewall, QoS and etc. By default, the
device is set to VoIP Router, concurrently, you can enjoy the content functions and at the same making a
toll-quality voice calls over the Internet or via a traditional landline.
Usually, the only information you need for the Quick Start Wizard in order to get you online is your login
information. Your ISP shall have supplied all the det ails yo u need. In additional, you have the option to
provide specific DNS as your desire, or check the Enable box to get the DNS automatically from your
ISP.
Chapter 4: Configuration
26
VoIP/(802.11g) Broadband Firewall Router
Analog Telephone Adaptor (ATA) vs. VoIP Router Functional Comparison Table
Functions ATA VoIP Router
LAN
NAT
DHCP Server
Device IP
WAN
System
Firewall
QoS
Virtual Server
Time Schedule
Disabled Active
Turn OFF Turn ON
Turn OFF Turn ON
0.0.0.0 / 0.0.0.0 192.168.1.254 / 24
Disabled Active
Disabled Active
Disabled Active
Disabled Active
Disabled Active
Disabled Active
Note: For ATA device
management. When
configuring to ATA mode,
to be sure you renew your
PC IP to be in the same
subnet as your ATA.
Fail to do renew your PC
IP will block you from
accessing the router
device. If problem
persists, please RESET
your router to its factory
settings (pushing the
RESET more than 6
seconds).
Advanced
Disabled Active
Here is detailed WAN Type description for your reference.
DHCP
(Obtain an IP
Address
Configure this WAN Interface to use DHCP client protocol to get an IP address
from your ISP automatically. Your ISP provides an IP address to the router
dynamically when logging in.
Automatically)
Static IP
(Fixed IP Address)
Configure this WAN interface with a specific IP address. This IP address
should be provided by your ISP.
PPPoE (PPP over Ethernet) is known as a dial-up DSL or cable service. It is
PPPoE
designed to integrate the broadband services into the current widely deployed,
easy-to-use, and low-cost dial-up-access networking infrastructure.
Chapter 4: Configuration
27
VoIP/(802.11g) Broadband Firewall Router
Configuration
When you click this item, you get following sub-items to configure your router.
LAN, System, Firewall, VoIP, QoS, Virtual Server, Time Schedule and Advanced
These functions are described below in the following sections.
LAN (Local Area Network)
Here are the items within LAN section: Ethernet, IP Alias, Ethernet Client Filter, Wireless, Wireless
Security, Wireless Client Filter and DHCP Server.
Ethernet
Primary IP Address
IP Address: The default IP on this router.
SubNetmask: The default subnet mask on this router.
RIP: RIP v1, RIP v2, and RIP v2 Multicast. Check to enable RIP function.
Chapter 4: Configuration
28
VoIP/(802.11g) Broadband Firewall Router
IP Alias
This function supports to create multiple virtual IP interfaces on this router. It helps to connect two or more
local networks to the ISP or remote node. In this case, an internal router is not required.
IP Address: Specify an IP address on this virtual interface.
SubNetmask: Specify a subnet mask on this virtual interface.
Security Interface: Specify the firewall setting on this virtual interface.
Internal: The network is behind NAT. All traffic will do network address translation when sending out to
Internet if NAT is enabled.
External: There is no NAT on this IP interface and connected to the Internet directly. Mostly it will be used
when providing multiple public IP addresses by ISP. In this case, you can use public IP address in local
network which gateway IP address point to the IP address on this interface.
DMZ: Specify this network to DMZ area. There is no NAT on this interface.
Chapter 4: Configuration
29
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