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Reference Manual for the ProSafe Wireless 802.11g Firewall/Print Server Model FWG114P v2

F-8 Virtual Private Networking

201-10301-02, May 2005

It will also be important to know the subnet mask of both gateway LAN Connections.

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.

Setting Up a VPN Tunnel Between Gateways

An 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.

Table 5-3. WAN (Internet/Public) and LAN (Internal/Private) Addressing

Gateway LAN or WAN VPNC Example Address

Gateway A LAN (Private) 10.5.6.1

Gateway A WAN (Public) 14.15.16.17

Gateway B LAN (Private) 22.23.24.25

Gateway B WAN (Public) 172.23.9.1

Table 5-4. Subnet Addressing

Gateway LAN or WAN Interface Name Example Subnet Mask

Gateway A LAN (Private) Subnet Mask A 255.255.255.0

Gateway B LAN (Private) Subnet Mask B 255.255.255.0

1 2 ... 251 252 253 254 255 256 257 258 259 260 261 ... 295 296

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Netgear 802.11g Manual de usuario Pagina 256