Netgear FWG114P FWG114P Reference Manual - Page 241
VPN Process Overview, Network Interfaces and Addresses, Interface Addressing - reviews
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Reference Manual for the ProSafe Wireless 802.11g Firewall/Print Server Model FWG114P VPN Process Overview Even though IPSec is standards-based, each vendor has its own set of terms and procedures for implementing the standard. Because of these differences, it may be a good idea to review some of the terms and the generic processes for connecting two gateways before diving into the specifics. Network Interfaces and Addresses The VPN gateway is aptly named because it functions as a "gatekeeper" for each of the computers connected on the Local Area Network behind it. In most cases, each Gateway will have a "public" facing address (WAN side) and a "private" facing address (LAN side). These addresses are referred to as the "network interface" in documentation regarding the construction of VPN communication. Please note that the addresses used in the example do not use full TCP/IP notation. Interface Addressing This TechNote uses example addresses provided the VPN Consortium. It is important to understand that you will be using addresses specific to the devices that you are attempting to connect via IPSec VPN. 10.5.6.0/24 VPNC Example Network Interface Addressing 172.23.9.0/24 LAN IP 10.5.6.1 Gateway A 14.15.16.17 WAN IP 22.23.24.25 WAN IP Gateway B LAN IP 172.23.9.1 Figure F-4: VPNC Example Network Interface Addressing It is also important to make sure the addresses do not overlap or conflict. That is, each set of addresses should be separate and distinct. Virtual Private Networking F-7 March 2004, 202-10027-01