Windows set proxy netsh

WinHTTP has been employed, instead of WinInet in Internet Explorer, as the Automatic Updates service affects system wide level configuration and should require administrator level control. WinHTTP is considered as more appropriate in this type of usage scenario. The Automatic Updates service can only discover a proxy server by using one of the following methods:.

The proxy server is manually configured by using the Proxycfg. For more information about how to use the Proxycfg. For more information about a related topic, click the following article number to view the article in the Microsoft Knowledge Base:.

If you use Internet Explorer to access the Windows Update Web site, the Windows Update client program discovers a proxy server by using the following methods in the order that they appear in.

To view the Automatically detect settings check box, follow these steps:. On the Tools menu, click Internet Options. If you connect to the Internet by using a proxy server on the local area network, click LAN Settings. If you connect to the Internet by using a proxy server for a dial-up connection or a VPN connection, click that connection, and then click Settings.

If the following conditions are true, the Windows Update client locates the proxy server by processing the automatic configuration script:. The Use automatic configuration script check box is selected in Internet Explorer. To view the Use automatic configuration script check box, follow these steps:.

If you connect to the Internet by using a proxy server for a dial-up or VPN connection, click that connection, and then click Settings. If the following conditions are true, the Windows Update client uses the user-defined proxy server to connect to the Internet:.

The Windows Update client cannot locate a proxy server by using automatic detection or by using an automatic configuration script. Note the value that appears in the Address box under Proxy server. If no proxy server is defined in Internet Explorer, the Windows Update client uses the proxy server that was configured by using the Proxycfg.

If the following conditions are true, the Windows Update client tries to connect to the Windows Update Web site directly:. In this scenario, if a proxy server is required to connect to the Internet, the Windows Update client cannot successfully connect to the Windows Update Web site. The Proxycfg. Additionally, you can use this tool to help you troubleshoot proxy server discovery problems in the network. In this situation, you can use this tool to help verify that an issue occurs because of a failure to discover a proxy server by using the other discovery methods, such as WPAD.

If you run the proxycfg. In this situation, you receive results that are similar to one of the following results. Click Start , click Run , type cmd, and then click OK. Here, we are setting up a portproxy that will listen on port and send the received data to the connectaddress A on port This is done via a separate TCP connection, as you can observe via Wireshark. Note that the portproxy config will be stored in the registry, so this is the place where you can detect persistent portproxies without using netsh.

Machine C will now reach out to B We can see a hit from Naturally, this also works in the other direction A reaching C through B. If you are writing a script or an application using the WinHttpRequest object, use the following technique to change proxy settings. Use the SetProxy method. Specify the access type in the first parameter, the name of the proxy in the second parameter, and a bypass list in the third parameter. The following example shows how the SetProxy method can be used in script to set proxy data.

To specify default settings and eliminate the need to use either the SetProxy method or the WinHttpSetOption function, use the proxy configuration utility. Using this utility, you can specify that your application access a network either directly, through a proxy, or through a combination of direct and proxy access by specifying a bypass list.

The WinHttpRequest object uses the proxy configuration tool settings by default. The following table lists the command line parameters available for use with the ProxyCfg. You can specify proxies in a space-delimited string. The proxy listings can contain the port number that is used to access the proxy.

If the proxy uses the default port number for that protocol, then you can omit the port number. If a proxy name is listed by itself, you can use it as the default proxy for any protocols that do not have a specified proxy.

You can list locally known host names or IP addresses in the proxy bypass list. Wildcard characters must be the left-most characters in the list. For example, "aaa. To list multiple addresses and host names, separate them with blank spaces or semicolons in the proxy bypass string. After Proxycfg. However, you can remove the proxy settings entirely.