Netgear FVL328 FVL328 Reference Manual - Page 214

Model FVL328 ProSafe High-Speed VPN Firewall Reference Manual Revision 2 10.5.6.0/24 LAN IP 10.5.6.1 VPNC Example Network Interface Addressing 172.23.9.0/24 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 email 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 DynDNS service. Gateway B will use the DDNS Service Provider when establishing a VPN tunnel. H-2 NETGEAR VPN Configuration FVS318 or FVM318 with FQDN to FVL328 May 2004, 202-10030-02