ProSecure Unified Threat Management UTM10 or UTM25 Reference Manual

Network Planning for Dual WAN Ports (UTM25 Only) B-9

v1.0, September 2009
Virtual Private Networks (VPNs)

When implementing virtual private network (VPN) tunnels, a mechanism must be used for

determining the IP addresses of the tunnel end points. The addressing of the firewall’s dual WAN

port depends on the configuration being implemented:

Figure B-6

TableB-2. IP addressing requirements for VPNs in dual WAN port systems

Configuration and WAN IP address Single WAN Port
Configurations
(Reference Cases)
Dual WAN Port Configurations
Rollover Modea
a. All tunnels must be re-established after a rollover using the new WAN IP address.
Load Balancing Mode
“VPN Road Warrior (Client-
to-Gateway)Fixed Allowed
(FQDN optional) FQDN required Allowed
(FQDN optional)
Dynamic FQDN required FQDN required FQDN required
“VPN Gateway-to-Gateway” Fixed Allowed
(FQDN optional) FQDN required Allowed
(FQDN optional)
Dynamic FQDN required FQDN required FQDN required
“VPN Telecommuter (Client-
to-Gateway Through a NAT
Router)
Fixed Allowed
(FQDN optional) FQDN required Allowed
(FQDN optional)
Dynamic FQDN required FQDN required FQDN required