Microsoft 2004 manual Edge Firewall, Leg Perimeter, Front Firewall, Back Firewall

Introduction

The ISA Server 2004 firewall comes with a number of pre-built Network Templates you can use to automatically configure Networks, Network Rules and Access Rules. The Network Templates are designed to get you started quickly by creating a base configuration on which you can build. You can choose from one of the following Network Templates:

•Edge Firewall

The Edge Firewall Network Template is used when the ISA Server 2004 firewall has a network interface directly connected to the Internet and a network interface connected to the Internal network

•3-Leg Perimeter

The 3-Leg Perimeter Network Template is used when you have an external interface, Internal interface and a perimeter network segment (DMZ) interface. This template configures the addresses and relationships between these networks.

•Front Firewall

The Front Firewall Template is used when the ISA Server 2004 firewall serves as a front- end firewall in a back-to-back firewall configuration.

•Back Firewall

The Back Firewall Template is used when the ISA Server 2004 firewall is located behind another ISA Server 2004 firewall, or a third-party firewall.

•Single Network Adapter

The Single Network Adapter Template is a special configuration that removes the ISA Server 2004 firewall’s network firewall capabilities. Instead, the Single Network Adapter template configures the machine as a unihomed Web caching server.

In this ISA Server 2004 Configuration Guide document, we outline the procedures to carry out two scenarios:

•Scenario 1: The Edge Firewall Configuration

•Scenario 2: The 3-Leg Perimeter Configuration

You only need to go through the section that applies to your current setup. If you followed the complete instructions in the first chapter of this guide, then you should perform the procedures in the second scenario. Otherwise, you can use the procedures provided in the first scenario.

ISA Server 2004 Configuration Guide 91