ISA Server 2004 Configuration Guide 119
Configuring the Web Proxy Client
The Web Proxy client configuration requires that the Web browser be set to use the ISA
Server 2004 firewall as its Web Proxy server. There are several ways to configure the Web
browser as a Web Proxy client. It can be:
• manually configured to use the IP address of the ISA Server 2004 firewall as its Web
Proxy server
• manually configured to use the autoconfiguration script
• automatically configured during Firewall client installation
• automatically configured using wpad entries in DNS and DHCP
In chapter 5 of the ISA Server 2004 Configuration Guide, you created wpad entries in DNS
and DHCP to support autoconfiguration of Web Proxy and Firewall client machines. Wpad
autodiscovery is the preferred method of configuring the Web Proxy client, as it allows users
to automatically receive Web Proxy settings without requiring them to configure their
browsers.
Another way you can automatically configure Web browsers as Web Proxy clients is to have
the browsers automatically configured when the Firewall client installed. This is the preferred
method of configuring browsers for machines that will also act as Web proxy clients.
The last option is to manually configure the browser. This option should be used when the
automatic configuration options are not available.
If you are using the example network configuration described in this ISA Server 2004
Configuration Guide, your DNS and DHCP servers are configured to provide wpad
information to the Web browsers so that they are autoconfigured. However, if you choose to
not use autoconfiguration, you can manually configure the browser. We will examine browser
configuration during Firewall client installation in the next section.
Perform the following steps to manually configure the Internet Explorer 6.0 Web browser:
1. On the CLIENT machine, right click on the Internet Explorer icon on the desktop and
click Properties.
2. In the Internet Properties dialog box, click the Connections tab. On the Connections
tab, click the LAN Settings button.
3. There are several Web proxy configuration options in the Local Area Network (LAN)
Settings dialog box. Put a checkmark in the Automatically detect settings check box to
enable the browser to use the wpad settings in DNS and DHCP. This is the default setting
for Internet Explorer Web browsers. Place a checkmark in the Use automatic
configuration script check box, and enter the location of the autoconfiguration script.
The autoconfiguration script is stored on the ISA Server 2004 firewall at the following
location:
http://ISALOCAL.msfirewall.org:8080/array.dll?Get.Routing.Script
The client machine must be able to resolve the name of the ISA Server 2004 firewall
included in the autoconfiguration script to the IP address on the Internal interface of the
firewall. Note that if the machine is able to use wpad to Automatically detect settings,
the information contained in the autoconfiguration script will be downloaded to the Web
Proxy client machine. Put a checkmark in the Use a proxy server for your LAN (These
settings will not apply to dial-up or VPN connections) check box, and enter the IP
address on the Internal interface of the ISA Server 2004 firewall in the Address text box.
