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Reference Manual for the ProSafe VPN Firewall 50 FVS338
4-16
Connecting the FVS338 to the Internet
January 2005
7.
Router’s MAC Address: This section determines the Ethernet MAC address that will be used 
by the firewall on the Internet port. Some ISPs will register the Ethernet MAC address of the 
network interface card in your PC when your account is first opened. They will then only 
accept traffic from the MAC address of that PC. This feature allows your firewall to 
masquerade as that PC by “cloning” its MAC address. To change the MAC address, select 
“Use this Computer’s MAC address.” The firewall will then capture and use the MAC address 
of the PC that you are now using. You must be using the one PC that is allowed by the ISP. Or, 
select “Use this MAC address” and enter it.
8.
Click Apply to save your settings.
9.
Click Test to test your Internet connection. If the NETGEAR Web site does not appear within 
one minute, refer to 
Configure Dynamic DNS (If Needed)
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 allows you to register an extension to its domain, and restores DNS 
requests for the resulting FQDN to your frequently-changing IP address.
You are going to need a fully qualified domain name to implement features such as exposed hosts 
and virtual private networks regardless of whether you have a fixed or dynamic IP address. 
The firewall contains a client that can connect to a dynamic DNS service provider. To use this 
feature, you must select a service provider and obtain an account with them. After you have 
configured your account information in the firewall, whenever your ISP-assigned IP address 
changes, your firewall will automatically contact your dynamic DNS service provider, log in to 
your account, and register your new IP address.
Perform the following steps to configure Dynamic DNS:
1.
If you haven’t already, log in to the firewall at its default LAN address of
 http://192.168.1.1
 
with its default user name of 
admin
, default password of 
password
, or using whatever 
password and LAN address you have chosen for the firewall.
2.
From the Main Menu of the browser interface, under WAN Setup, click on Dynamic DNS. 
You will get the screen shown in 
.