ProSafe Dual WAN Gigabit Firewall with SSL & IPsec VPN FVS336G Reference Manual
Connecting the FVS336G to the Internet 2-17
v1.2, June 2008
•Address range. If this option is selected, you must enter the start and finish fields.
4. Click Add to save this rule.
The new Protocol Binding Rule will be enabled and added to the Protocol Binding Table for
the WAN1 port.
5. Open the WAN2 Protocol Bindings tab and repeat the previous steps to set protocol bindings
for the WAN2 port.
Configuring Dynamic DNS (Optional)
Dynamic DNS (DDNS) is an Internet service that allows routers with varying public IP addresses
to be located using Internet domain names. To use DDNS, you must setup an account with a
DDNS provider such as DynDNS.org, TZO.com or Iego.net. (Links to DynDNS, TZO and Iego
are provided for your convenience on the Dynamic DNS Configuration screen.) The VPN
firewall firmware includes software that notifies dynamic DNS servers of changes in the WAN IP
address, so that the services running on this network can be accessed by others on the Internet.
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—hence, the need for a commercial
DDNS 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.
After you have configured your account information in the firewall, whenever your ISP-assigned
IP address changes, your firewall will automatically contact your DDNS service provider, log in to
your account, and register your new IP address.
• For auto-rollover mode, you will need a fully qualified domain name (FQDN) to implement
features such as exposed hosts and virtual private networks regardless of whether you have a
fixed or dynamic IP address.
• For load balancing mode, you may still need a fully qualified domain name (FQDN) either for
convenience or if you have a dynamic IP address.
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.