Quick Reference Guide

ProSafe VPN Firewall 50 FVS338 Reference Manual
2-12 Connecting the VPN Firewall to the Internet
v1.0, January 2010
NAT is the default setting. Select NAT if your ISP has assigned only one IP address to you.
The computers that connect through the VPN firewall must then be assigned IP addresses from
a private subnet (for example: 192.168.1.0).
• Classical Routing. In this mode, the VPN firewall performs routing, but without NAT. To gain
Internet access, each PC on your LAN must have a valid Internet IP address.
If your ISP has allocated many IP addresses to you, and you have assigned one of these
addresses to each PC, you can choose classical routing. Or, you can use classical routing for
routing private IP addresses within a campus environment. Otherwise, selecting this method
will not allow Internet access through the VPN firewall.
To configure the WAN mode:
1. Select Network Configuration from the main menu and WAN Mode from the submenu. The
WAN Mode screen will display.
2. Check either the NAT or Classical Routing radio box. NAT is the default.
Note: The VPN firewall will delete all inbound firewall rules when switching
between NAT and Classical Routing.
Figure 2-6