IPSec between PIX Firewall and Cisco VPN 3000 Concentrator with Overlapping Private Networks Configuration Example

This document describes how to configure the Cisco Secure PIX Firewall in a site-to-site IPSec VPN with overlapping private network addresses behind VPN gateways. The enhanced Network Address Translation (NAT) feature introduced in PIX 6.2 is used in this example to translate the overlapping networks on each side of the IPSec VPN tunnel to non-overlapping address spaces.

Read More