Firewalls; Vpn Tunnel Between Gateways - NETGEAR FVS318 - ProSafe VPN Firewall Router Reference Manual

Reference Manual for the ProSafe VPN Firewall FVS318v3
Table C-1. WAN (Internet/public) and LAN (internal/private) addressing
Gateway
Gateway A
Gateway A
Gateway B
Gateway B
You need to know the subnet mask of both gateway LAN Connections. Refer to
"Technical Specifications" to gather the necessary address and subnet mask information to aid in
the configuration and troubleshooting process.
Table C-2. Subnet addressing
Gateway
Gateway A
Gateway B

Firewalls

It is important to understand that many gateways are also firewalls. VPN tunnels cannot function
properly if firewall settings disallow all incoming traffic. Please refer to the firewall instructions
for both gateways to understand how to open specific protocols, ports, and addresses that you
intend to allow.

VPN Tunnel Between Gateways

A Security Association (SA), frequently called a tunnel, is the set of information that allows two
entities (networks, PCs, routers, firewalls, gateways) to trust each other and communicate securely
as they pass information over the Internet.
C-8
LAN or WAN
LAN (Private)
WAN (Public)
LAN (Private)
WAN (Public)
LAN or WAN
LAN (Private)
LAN (Private)
January 2005
VPNC Example Address
10.5.6.1
14.15.16.17
22.23.24.25
172.23.9.1
Interface Name
Subnet Mask A
Subnet Mask B
Appendix A,
Example Subnet Mask
255.255.255.0
255.255.255.0
Virtual Private Networking