Article ID: 309814 - View products that this article applies to.
This article was previously published under Q309814
ISA Server supports several client types, including Web Proxy client computers and Firewall client computers. You can configure a CERN-compliant browser to be a Web Proxy client. Web Proxy client browsers send Hypertext Transfer Protocol (HTTP) requests directly to the Web Proxy service on the computer that is running ISA Server. Computers that have Firewall Client installed are called Firewall clients. Firewall clients forward Winsock requests directly to the Firewall service on the ISA Server computer.
You can manually configure both the Web Proxy client and the Firewall client with the Internet Protocol (IP) address or the computer name of the ISA Server computer. However, if you manually configure the address for the Web Proxy client and the Firewall client for mobile users, the users may find this configuration cumbersome. Both client types support Autoconfiguration. When you configure the Web Proxy and Firewall client to use Autodiscovery, mobile users do not need to manually reconfigure client settings. This article describes how to configure Autodiscovery for a Firewall client and the Web Proxy client.
To configure the DNS server to send the Autoconfiguration URL to the Web Proxy and Firewall client:
http://wpad/wpad.datIf you have not configured a WPAD alias in DNS, the string value is:
http://ISA Servername/wpad.datNOTE: ISA processes AutoDiscovery requests on port 80. Unless this port has been changed, the port number that you enter in the configuration for option 252 is the default of 80. It is not recommended to access autodiscovery information through the WebProxy port or to make the autodiscovery port the same as the web proxy port as it can fail if user based authentication is enforced. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/305204/EN-US/ )Clients That Use an Automatic Configuration Script May Not Work Because of Proxy Authentication
For additional information about how to enable proxy Autodiscovery in Windows 2000, click the article number below to view the article in the Microsoft Knowledge Base:
252898For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/252898/EN-US/ )How to Enable Proxy Autodiscovery in Windows 2000
(http://support.microsoft.com/kb/284690/EN-US/ )The 'Automatically Detect ISA Server' Option in the Firewall Client Is Unavailable
(http://support.microsoft.com/kb/260210/EN-US/ )Description of WinSock Proxy Auto Detect Support
(http://support.microsoft.com/kb/296591/EN-US/ )A Description of the Automatic Discovery Feature
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