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.


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