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Reference Manual for the ProSafe VPN Firewall 25 with 4 Gigabit LAN and Dual WAN Ports
Network Planning 3-7
202-10085-01, March 2005
Figure 3-8: Single gateway WAN port case for VPN road warrior
The IP address of the gateway WAN port can be either fixed or dynamic. If the IP address is
dynamic, a fully-qualified domain name must be used. If the IP address is fixed, a fully-qualified
domain name is optional.
VPN Road Warrior: Dual Gateway WAN Ports for Improved Reliability
In the case of the dual WAN ports on the gateway VPN firewall (Figure 3-9), the remote PC client
initiates the VPN tunnel with the active gateway WAN port (port WAN1 in this example) because
the IP address of the remote PC client is not known in advance. The gateway WAN port must act
as a responder.
Figure 3-9: Dual gateway WAN ports, before rollover, for VPN road warrior
The IP addresses of the gateway WAN ports can be either fixed or dynamic, but a fully-qualified
domain name must always be used because the active WAN port could be either WAN1 or WAN2
(i.e., the IP address of the active WAN port is not known in advance).
Gateway A
bzrouter.dyndns.org
10.5.6.0/24
10.5.6.1
WAN IP
WAN IP
LAN IP
Client B
FQDN
0.0.0.0
VPNRouter
(atemployer's
mainoffice)
Road Warrior Example (Single WAN Port)
RemotePC
(runningNETGEAR
ProSafeVPNClient)
Fully-QualifiedDomain Names(FQDN)
-optionalfor FixedIPaddresses
-requiredforDynamicIPaddresses
Gateway A
bzrouter.dyndns.org
10.5.6.0/24
10.5.6.1
WAN1 IP
WAN IP
LAN IP
Client B
0.0.0.0
VPNRouter
(atemployer's
mainoffice)
Road Warrior Example
(Dual WAN Ports, Before Rollover)
RemotePC
(runningNETGEAR
ProSafeVPNClient)
Fully-QualifiedDomain Names(FQDN)
-requiredforFixedIPaddresses
-requiredforDynamicIPaddresses
WAN2 port inactive
WAN2 IP (N/A)
X
X