Other Windows features may also be affected by this limitation unless they can access the Internet without identifying a proxy server.
Method 1: Use the Web Proxy Autodiscovery (WPAD) protocolThe WPAD protocol lets Windows Vista-based computers automatically discover proxy servers on the network. For more information about the WPAD protocol, visit the following Microsoft Web site: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Method 2: Use the netsh command to manually specify the proxy serverNote The netsh command is independent of the proxy settings that are specified in Microsoft Internet Explorer. After you set the proxy server by using the netsh command, you must still configure the Internet Explorer proxy settings by using the Local Area Network (LAN) Settings dialog box.
- Click Start , click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
- At the command prompt, type the following command, and then press ENTER: netsh winhttp set proxy ProxyServer:PortNumberFor example, type netsh winhttp set proxy Proxy1:80.
- To set the Internet Explorer proxy settings in the Local Area Network (LAN) Settings dialog box, follow the steps in the "How to manually set proxy settings" section.
How to manually set proxy settingsIf you manually set the proxy settings by using the Local Area Network (LAN) Settings dialog box in Internet Explorer, you may experience the following limitations:
- The proxy settings can only be read by NCSI when a user logs on to the Windows Vista-based computer.
- If each user who logs on to the Windows Vista-based computer has different proxy settings, the proxy settings of the last user who logged on are used.
- If the proxy settings specify a .pac file, the .pac file must be located on an HTTP server before NCSI can successfully process the .pac file.
- In Internet Explorer, click Tools, and then click Internet Options.
- Click the Connections tab, and then click LAN Settings.
- Click to enable the Use automatic configuration script check box, and then make sure that you include the Web address of the proxy server in the Address box. For example, use the following address: HTTP://Proxy_Server_URL