Netgear FWG114P FWG114P Reference Manual - Page 258

Reference Manual for the ProSafe Wireless 802.11g Firewall/Print Server Model FWG114P 10.5.6.0/24 VPNC Example Network Interface Addressing 172.23.9.0/24 LAN IP 10.5.6.1 Gateway A WAN IP FQDN netgear.dydns.org WAN IP 22.23.24.25 Gateway B LAN IP 172.23.9.1 Figure H-1: Addressing and Subnet Used for Examples Using DDNS and Fully Qualified Domain Names (FQDN) Many ISPs (Internet Service Providers) provide connectivity to their customers using dynamic instead of static IP addressing. This means that a user's IP address does not remain constant over time, which presents a challenge for gateways attempting to establish VPN connectivity. A Dynamic DNS (DDNS) service allows a user whose public IP address is dynamically assigned to be located by a host or domain name. It provides a central public database where information (such as e-mail addresses, host names and IP addresses) can be stored and retrieved. Now, a gateway can be configured to use a 3rd party service in lieu of a permanent and unchanging IP address to establish bi-directional VPN connectivity. To use DDNS, you must register with a DDNS service provider. Example DDNS Service Providers include: Table H-1. Example DDNS Service Providers DynDNS www.dyndns.org TZO.com netgear.tzo.com ngDDNS ngddns.iego.net In this example, Gateway A is configured using an example FQDN provided by a DDNS Service provider. In this case we established the hostname netgear.dyndns.org for Gateway A using the H-2 NETGEAR VPN Configuration FVS318 or FVM318 with FQDN to FVS328 March 2004, 202-10027-01