Internet Explorer Uses Proxy Server for Local IP Address Even if the Bypass Proxy Server for Local Addresses Option Is Turned On

Warning

The retired, out-of-support Internet Explorer 11 desktop application is scheduled to be permanently disabled through a Microsoft Edge update on certain versions of Windows 10 on February 14, 2023. We highly recommend setting up IE mode in Microsoft Edge and disabling IE11 prior to this date to ensure your organization does not experience business disruption.

For more information, see this FAQ page.

This article helps you resolve the problem that occurs when you connect to a Web server using the Internet Protocol (IP) address or Fully Qualified Domain Name (FQDN) on the local network.

Applies to:   Windows 7 Enterprise, Windows 7 Enterprise N, Windows 7 Home Basic, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Professional N, Windows 7 Starter, Windows 7 Starter N, Windows 7 Ultimate, Windows 7 Ultimate N, Microsoft Windows Server 2003 Standard Edition (32-bit x86), Internet Explorer
Original KB number:   262981

Symptoms

When you connect to a Web server using the Internet Protocol (IP) address or Fully Qualified Domain Name (FQDN) on the local network, Microsoft Internet Explorer or Windows Internet Explorer connects through an assigned proxy server even if the Bypass proxy server for local addresses option is turned on.

However, if you connect to a Web server using the host name (for example, http://webserver) instead of the IP address (for example, http://10.0.0.1) or FQDN (for example, http://webserver.domainname.com), the proxy server is bypassed and Internet Explorer connects directly to the server.

Cause

By default, only host names are checked when the Bypass proxy server for local addresses option is turned on.

Resolution

To bypass a range of IP addresses or a specific domain name, specify the addresses in the proxy exception list:

  1. In Internet Explorer, on the Tools menu, select Internet Options.
  2. On the Connections tab, select LAN Settings.
  3. Select Advanced, and type the appropriate information in the Exceptions area.

Status

This behavior is by design.