Set a Windows computer to route network traffic through a proxy server by changing the setting in the Local Area Network Settings dialog under the Connections tab in Internet Properties. You may need permission from your network administrator if you are trying use a proxy server at work.Continue Reading
Hold the Windows key and press R to bring up a Run window. In the text entry field in the Run window, type "inetcpl.cpl". Click OK or press Enter to open the Internet Properties window. If you are using Internet Explorer, you can also access Internet Properties from the Tools menu.
In the Internet Properties window, click on the Connections tab. Under Local Area Network (LAN), click on the button labeled LAN settings.
Under the Proxy settings section in the Local Area Network (LAN) dialog, check the box beside Use a proxy server for your LAN; the previously grayed-out fields below it should become active. Enter the proxy server address and port settings in their respective fields, and press OK to save the settings change.
Open a web browser, and try to browse the Internet. If the proxy server is functional and the settings you entered are correct, you should be able to do so normally. Some browsers, such as Firefox, must be set to use system settings before any meaningful effect becomes visible.