Is IIS configured to use host headers?
This is a setting you configure when you create a new IIS Web site. The IIS default is to not use host headers, and this is preferable for ISA Server Web publishing. If you configured IIS to use a specific host header, take one of these actions: • Change IIS to not expect a specific host header. • Change the header required by IIS to be the one expected from ISA Server. • Select the Web publishing rule option Send the original host header to the publishing server instead of the actual one (specified above), as described in the Web publishing scenario documents. For information on how to change the host header requirements, see IIS documentation. For general IIS troubleshooting information, see Windows 2000 Help.