Netgear Router WGT624 User Manual

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
Advanced Configuration 6-3
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Local Web and FTP Server Example
If a local PC with a private IP address of 192.168.0.33 acts as a web and FTP server, configure the 
Ports menu to forward HTTP (port 80) and FTP (port 21) to local address 192.168.0.33 
In order for a remote user to access this server from the Internet, the remote user must know the IP 
address that has been assigned by your ISP. If this address is 172.16.1.23, for example, an Internet 
user can access your web server by directing the browser to http://172.16.1.23. The assigned IP 
address can be found in the Maintenance Status Menu, where it is shown as the WAN IP Address.
Some considerations for this application are:
• If your account’s IP address is assigned dynamically by your ISP, the IP address may change 
periodically as the DHCP lease expires.
• If the IP address of the local PC is assigned by DHCP, it may change when the PC is rebooted. 
To avoid this, you can manually configure the PC to use a fixed address.
• Local PCs must access the local server using the PCs’ local LAN address (192.168.0.33 in this 
example). Attempts by local PCs to access the server using the external IP address 
(172.16.1.23 in this example) will fail.
Multiple Computers for Half Life, KALI or Quake III Example
To set up an additional computer to play Half Life, KALI or Quake III: 
1.Click the button of an unused port in the table. 
2.Select the game again from the Service Name list. 
3.Change the beginning port number in the Start Port box.  
For these games, use the supplied number in the default listing and add +1 for each additional 
computer. For example, if youve already configured one computer to play Hexen II (using 
port 26900), the second computers port number would be 26901, and the third computer 
would be 26902. 
4.Type the same port number in the End Port box that you typed in the Start Port box. 
5.Type the IP address of the additional computer in the Server IP Address box. 
6.Click Apply.  
						

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
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Some online games and videoconferencing applications are incompatible with NAT. The WGT624 
wireless router is programmed to recognize some of these applications and to work properly with 
them, but there are other applications that may not function well. In some cases, one local PC can 
run the application properly if that PC’s IP address is entered as the default in the PORTS Menu. If 
one local PC acts as a game or videoconferencing host, enter its IP address as the default.
Configuring WAN Setup Options
The WAN Setup options let you configure a DMZ server, change the MTU size and enable the 
wireless router to respond to a Ping on the WAN port. These options are discussed below.
 
Figure 6-2:  WAN Setup menu.
• Connect Automatically, as Required
Normally, this option should be Enabled, so that an Internet connection will be made 
automatically, whenever Internet-bound traffic is detected. In locations where Internet access 
is billed by the minute, if this causes high connection costs, you can disable this setting. 
If disabled, you must connect manually, using the sub-screen accessed from the Router Status 
menu “Show WAN Status” screen.
• Disable SPI Firewall 
Normally, this option should be Enabled, so that your local network will be protected by the 
Stateful Packet Inspection (SPI) firewall included in the WGT624. However, certain 
communications functions like VPN may require turning off the SPI feature. 
• Setting Up a Default DMZ Server 
						

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
Advanced Configuration 6-5
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The default DMZ server feature is helpful when using some online games and 
videoconferencing applications that are incompatible with NAT. The router is programmed to 
recognize some of these applications and to work properly with them, but there are other 
applications that may not function well. In some cases, one local PC can run the application 
properly if that PC’s IP address is entered as the default DMZ server.
Incoming traffic from the Internet is normally discarded by the router unless the traffic is a 
response to one of your local computers or a service that you have configured in the Ports menu. 
Instead of discarding this traffic, you can have it forwarded to one computer on your network. This 
computer is called the Default DMZ Server.
The WAN Setup menu, shown below lets you configure a Default DMZ Server.
To assign a computer or server to be a Default DMZ server, follow these steps: 
1.Click WAN Setup link on the Advanced section of the main menu. 
2.Type the IP address for that server. To remove the default DMZ server, replace the IP address 
numbers with all zeros.
3.Click Apply.
• Respond to Ping on Internet WAN Port 
If you want the router to respond to a ping from the Internet, click the ‘Respond to Ping on 
Internet WAN Port’ check box. This should only be used as a diagnostic tool, since it allows 
your router to be discovered. Dont check this box unless you have a specific reason to do so.
• Setting the MTU Size
The default MTU size is usually fine. The normal MTU (Maximum Transmit Unit) value for 
most Ethernet networks is 1500 Bytes. For some ISPs, particularly some using PPPoE, you 
may need to reduce the MTU. This should not be done unless you are sure it is necessary for 
your ISP. 
Any packets sent through the router that are larger than the configured MTU size will be 
repackaged into smaller packets to meet the MTU requirement. To change the MTU size:
Under MTU Size, enter a new size between 64 and 1500. Then, click Apply to save the new 
configuration.
Note: DMZ servers pose a security risk. A computer designated as the default DMZ 
server loses much of the protection of the firewall, and is exposed to exploits from the 
Internet. If compromised, the DMZ server can be used to attack your network. 
						

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
6-6 Advanced Configuration
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Using a Dynamic DNS Service
If your network has a permanently assigned IP address, you can register a domain name and have 
that name linked with your IP address by public Domain Name Servers (DNS). However, if your 
Internet account uses a dynamically assigned IP address, you will not know in advance what your 
IP address will be, and the address can change frequently. In this case, you can use a commercial 
dynamic DNS service which will allow you to register your domain to their IP address, and will 
forward traffic directed at your domain to whatever your current IP address happens to be.
The router contains a client that can connect to many popular dynamic DNS services. You can 
select one of these services and obtain an account with them. Then, whenever your ISP-assigned 
IP address changes, your router will automatically contact your dynamic DNS service provider, 
log in to your account, and register your new IP address.
From the Main Menu of the browser interface, under Advanced, click on Dynamic DNS. To 
configure Dynamic DNS:
1.Register for an account with one of the dynamic DNS service providers whose names appear 
in the ‘Select Service Provider’ box. For example, for dyndns.org, go to www.dyndns.org.
2.Select the Use a Dynamic DNS service check box. 
3.Select the name of your dynamic DNS Service Provider. 
4.Type the Host Name (or domain name) that your dynamic DNS service provider gave you.
5.Type the User Name for your dynamic DNS account. 
6.Type the Password (or key) for your dynamic DNS account. 
7.If your dynamic DNS provider allows the use of wildcards in resolving your URL, you may 
select the Use wildcards check box to activate this feature.  
For example, the wildcard feature will cause *.yourhost.dyndns.org to be aliased to the same 
IP address as yourhost.dyndns.org
8.Click Apply to save your configuration.
Note: If your ISP assigns a private WAN IP address (such as 192.168.x.x or 10.x.x.x), 
the dynamic DNS service will not work because private addresses will not be routed on 
the Internet. 
						

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
Advanced Configuration 6-7
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Using LAN IP Setup Options
The LAN IP Setup feature is under the Advanced heading of the main menu. This feature allows 
configuration of LAN IP services such as DHCP and RIP. From the Main Menu of the browser 
interface, under Advanced, click on LAN IP Setup to view the LAN IP Setup menu, shown below.
Figure 6-3:  LAN IP Setup Menu
The router is shipped preconfigured to use private IP addresses on the LAN side, and to act as a 
DHCP server. The router’s default LAN IP configuration is:
• LAN IP addresses—192.168.0.1
• Subnet mask—255.255.255.0
These addresses are part of the IETF-designated private address range for use in private networks, 
and should be suitable in most applications. If your network has a requirement to use a different IP 
addressing scheme, you can make those changes in this menu.
The LAN IP parameters are: 
						

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• IP Address 
This is the LAN IP address of the router.
• IP Subnet Mask 
This is the LAN Subnet Mask of the router. Combined with the IP address, the IP Subnet Mask 
allows a device to know which other addresses are local to it, and which must be reached 
through a gateway or router.
• RIP Direction 
RIP (Router Information Protocol) allows a router to exchange routing information with other 
routers. The RIP Direction selection controls how the router sends and receives RIP packets. 
Both is the default. 
— When set to Both or Out Only, the router will broadcast its routing table periodically. 
— When set to Both or In Only, it will incorporate the RIP information that it receives. 
— When set to None, it will not send any RIP packets and will ignore any RIP packets 
received. 
• RIP Version 
This controls the format and the broadcasting method of the RIP packets that the router sends. 
(It recognizes both formats when receiving.) By default, this is set for RIP-1. 
— RIP-1 is universally supported. RIP-1 is probably adequate for most networks, unless you 
have an unusual network setup. 
— RIP-2 carries more information. RIP-2B uses subnet broadcasting.
Using the Router as a DHCP server
By default, the router will function as a DHCP (Dynamic Host Configuration Protocol) server, 
allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to 
the routers LAN. The assigned default gateway address is the LAN address of the router. IP 
addresses will be assigned to the attached PCs from a pool of addresses specified in this menu. 
Each pool address is tested before it is assigned to avoid duplicate addresses on the LAN.
Note: If you change the LAN IP address of the router while connected through the 
browser, you will be disconnected. You may need to restart your computer for the new IP 
address setting to take effect. 
						

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
Advanced Configuration 6-9
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For most applications, the default DHCP and TCP/IP settings of the router are satisfactory. See “IP 
Configuration by DHCP” on page B-10 for an explanation of DHCP and information about how to 
assign IP addresses for your network. 
If another device on your network will be the DHCP server, or if you will manually configure the 
network settings of all of your computers, clear the ‘Use router as DHCP server’ check box. 
Otherwise, leave it checked. 
Specify the pool of IP addresses to be assigned by setting the Starting IP Address and Ending IP 
Address. These addresses should be part of the same IP address subnet as the router’s LAN IP 
address. Using the default addressing scheme, you should define a range between 192.168.0.2 and 
192.168.0.253, although you may wish to save part of the range for devices with fixed addresses.
The router will deliver the following parameters to any LAN device that requests DHCP:
• An IP Address from the range you have defined
• Subnet Mask
• Gateway IP Address (the router’s LAN IP address)
• Primary DNS Server (if you entered a Primary DNS address in the Basic Settings menu; 
otherwise, the router’s LAN IP address)
• Secondary DNS Server (if you entered a Secondary DNS address in the Basic Settings menu
Using Address Reservation
When you specify a reserved IP address for a PC on the LAN, that PC will always receive the 
same IP address each time it access the router’s DHCP server. Reserved IP addresses should be 
assigned to servers that require permanent IP settings. 
To reserve an IP address: 
1.Click the Add button. 
2.In the IP Address box, type the IP address to assign to the PC or server. 
(choose an IP address from the router’s LAN subnet, such as 192.168.0.X) 
3.Type the MAC Address of the PC or server.  
(Tip: If the PC is already present on your network, you can copy its MAC address from the 
Attached Devices menu and paste it here.) 
4.Click Apply to enter the reserved address into the table.  
						

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
6-10 Advanced Configuration
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Note: The reserved address will not be assigned until the next time the PC contacts the routers 
DHCP server. Reboot the PC or access its IP configuration and force a DHCP release and renew. 
To edit or delete a reserved address entry: 
1.Click the button next to the reserved address you want to edit or delete. 
2.Click Edit or Delete.
How to Configure Static Routes
Static Routes provide additional routing information to your router. Under normal circumstances, 
the router has adequate routing information after it has been configured for Internet access, and 
you do not need to configure additional static routes. You must configure static routes only for 
unusual cases such as multiple routers or multiple IP subnets located on your network.
From the Main Menu of the browser interface, under Advanced, click on Static Routes to view the 
Static Route menu, shown below. 
Figure 6-4. Static Route Summary Table
To add or edit a Static Route: 
						

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
Advanced Configuration 6-11
M-10153-01 1.
Click the Add button to open the Add/Edit Menu, shown below.
Figure 6-5. Static Route Entry and Edit Menu
2.
Type a route name for this static route in the Route Name box under the table. 
(This is for identification purpose only.) 
3.Select Private if you want to limit access to the LAN only. The static route will not be reported 
in RIP. 
4.Select Active to make this route effective. 
5.Type the Destination IP Address of the final destination. 
6.Type the IP Subnet Mask for this destination. 
If the destination is a single host, type 255.255.255.255. 
7.Type the Gateway IP Address, which must be a router on the same LAN segment as the router. 
8.Type a number between 1 and 15 as the Metric value.  
This represents the number of routers between your network and the destination. Usually, a 
setting of 2 or 3 works, but if this is a direct connection, set it to 1. 
9.Click Apply to have the static route entered into the table. 
As an example of when a static route is needed, consider the following case:
• Your primary Internet access is through a cable modem to an ISP.
• You have an ISDN router on your home network for connecting to the company where 
you are employed. This router’s address on your LAN is 192.168.0.100.
• Your company’s network is 134.177.0.0. 
						

							Reference Manual for the 108 Mbps Wireless Firewall Router WGT624
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When you first configured your router, two implicit static routes were created. A default route was 
created with your ISP as the gateway, and a second static route was created to your local network 
for all 192.168.0.x addresses. With this configuration, if you attempt to access a device on the 
134.177.0.0 network, your router will forward your request to the ISP. The ISP forwards your 
request to the company where you are employed, and the request will likely be denied by the 
company’s firewall.
In this case you must define a static route, telling your router that 134.177.0.0 should be accessed 
through the ISDN router at 192.168.0.100. The static route would look like Figure 6-5.
In this example:
• The Destination IP Address and IP Subnet Mask fields specify that this static route applies to 
all 134.177.0.x addresses. 
• The Gateway IP Address fields specifies that all traffic for these addresses should be 
forwarded to the ISDN router at 192.168.0.100. 
• A Metric value of 1 will work since the ISDN router is on the LAN. 
• Private is selected only as a precautionary security measure in case RIP is activated.
Enabling Remote Management Access
Using the Remote Management page, you can allow a user or users on the Internet to configure, 
upgrade and check the status of your WGT624 wireless router.
To configure your router for Remote Management:
1.Select the Turn Remote Management On check box.
2.Specify what external addresses will be allowed to access the router’s remote management. 
 
Note: For enhanced security, restrict access to as few external IP addresses as practical.
a.To allow access from any IP address on the Internet, select Everyone. 
Note: Be sure to change the routers default configuration password to a very secure 
password. The ideal password should contain no dictionary words from any language, 
and should be a mixture of letters (both upper and lower case), numbers, and symbols. 
Your password can be up to 30 characters.