NETGEAR ProSafe FVS124G - Manual (Page 38)

Reference Manual for the ProSafe VPN Firewall 25 with 4 Gigabit LAN and Dual WAN Ports
3-8 Network Planning
202-10085-01, March 2005
After a rollover of the gateway WAN port ( Figure 3-10 ), the previously inactive gateway WAN
port becomes the active port (port WAN2 in this example) and the remote PC client must
re-establish the VPN tunnel. The gateway WAN port must act as the responder.
Figure 3-10: Dual gateway WAN ports, after rollover, for VPN road warrior
The purpose of the fully-qualified domain name in this case is to toggle the domain name of the
gateway firewall between the IP addresses of the active WAN port (i.e., WAN1 and WAN2) so that
the remote PC client can determine the gateway IP address to establish or re-establish a VPN
tunnel.
VPN Road Warrior: Dual Gateway WAN Ports for Load Balancing
In the case of the dual WAN ports on the gateway VPN firewall ( Figure 3-11 ), the remote PC
initiates the VPN tunnel with the appropriate gateway WAN port (i.e., port WAN1 or WAN2 as
necessary to balance the loads of the two gateway WAN ports) because the IP address of the
remote PC is not known in advance. The chosen gateway WAN port must act as the responder.
Figure 3-11: Dual gateway WAN ports (load balancing case) for VPN road warrior
Gateway A
WAN1 port inactive
10.5.6.0/24
10.5.6.1
WAN1 IP (N/A)
WAN IP
LAN IP
Client B
0.0.0.0
VPN Router
(at employer's
main office)
Road Warrior Example
(Dual WAN Ports, After Rollover)
Remote PC
(running NETGEAR
ProSafe VPN Client) Fully-Qualified Domain Names (FQDN)
- required for Fixed IP addresses
- required for Dynamic IP addresses
bzrouter.dyndns.org
WAN2 IP
Remote PC must re-establish VPN tunnel after a rollover
X X
Gateway A
bzrouter1.dyndns.org
10.5.6.0/24
10.5.6.1
WAN1 IP
WAN IP
LAN IP
Client B
0.0.0.0
VPN Router
(at employer's
main office)
Road Warrior Example
(Dual WAN Ports, Load Balancing)
Remote PC
(running NETGEAR
ProSafe VPN Client) Fully-Qualified Domain Names (FQDN)
- optional for Fixed IP addresses
- required for Dynamic IP addresses
bzrouter2.dyndns.org
WAN2 IP