.pac File Is Applied to LAN Instead of DUN Connection

If you have a Dial-Up Networking (DUN) connection that contains a pointer to an automatic configuration (.ins) file that uses a .pac file to set the proxy server for that connection, the proxy server may be set for a LAN connection instead of the DUN connection.

To resolve this problem, obtain the latest service pack for Internet Explorer version 5.01. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Internet Explorer version 5.01 Service Pack 1.