Introduction

In this chapter we focus on ISA Server configuration issues that have their primary influence on outbound access and outbound access control. Although we often think of a firewall as something to prevent external intruders from accessing internal resources, just as much havoc can result if we fail to control what internal users can access on the Internet.

The major issues we tackle in this chapter include:

• Configuring ISA Server for outbound access

• Understanding and configuring the Network Configuration settings

• Creating a secure outbound access policy

• Configuring the application filters that affect primarily outbound access

• Understanding and configuring the Web proxy cache

Once you have a firm grasp on these issues, you will be able to configure a secure outbound access policy and ISA Server configuration.