User's Manual

Reference Manual for the NETGEAR ProSafe VPN Client
C-2 NETGEAR ProSafe VPN Client to NETGEAR FVS318 or FVM318 VPN Routers
202-10015-01
Figure C-1: Addressing and Subnets Used for Examples
The Use of a Fully Qualified Domain Name (FQDN)
Many ISPs 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 name 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 3
rd
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:
Note: This configuration case study is based on the FVS318 using FQDN. FQDN is the
best option when the Internet connection for the FVS318 uses a dynamic IP
configuration rather than a static IP configuration. However, the steps below can be used
when the FVS318 has a static IP configuration as well.
Gateway
0.0.0.0
FVSrouter.dydns.org
FQDN
192.168.0.1
WAN IP
WAN IP
LAN IP
Network Addresses
Client
PC with Netgear
ProSafe VPN client
FVS318