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.

A vital tool to use when troubleshooting computer networking problems and monitoring computer networks is a packet sniffer. That being said, one of the best methods to use when troubleshooting connection problems or monitoring suspicious network activity in a Cisco Systems PIX firewall is by using the capture command. Many times Cisco TAC will request captures from a PIX in PCAP format for open problem tickets associated with unusual problems or activity associated with the PIX and the network.

How to Configure PIX Firewall.

Abstract:

Please find below a step by step process to configure the PIX Firewall from scratch. A simple scenario is given here where you have a corporate network with a PIX Firewall connected to the Internet through the Outside Interface, Internal Network through the Inside interface and DMZ through the DMZ Network. This paper would assist you in a simple step by step, near complete configuration for a PIX Firewall running a midsized corporate network

Please find below a step by step process to configure the PIX Firewall from scratch. A simple scenario is given here where you have a corporate network with a PIX Firewall connected to the Internet through the Outside Interface, Internal Network through the Inside interface and DMZ through the DMZ Network. This paper would assist you in a simple step by step, near complete configuration for a PIX Firewall running a midsized corporate network

This is part II of the How to Configure Pix Firewall, a step by step approach.
This is in continuation of the Part I of the series.

This article discusses the Top ten tips that you can implement to best manage and fine tune your firewall. The purpose of this article is to get the best performance out of your firewall and increased security to your network.

Please find enclosed the cisco site to site VPN configuration in a nutshell. These basic commands would help in configuring a site to site VPN setup. This can also assist in troubleshooting vpn issues.