HTTP Error 401.1 - Unauthorized (locally only)
When you attempt to access XIA Configuration Server locally from the server where it is installed you may be prompted for credentials. Entering the credentials does not allow access even when the credentials are correct and the following error is displayed
HTTP Error 401.1 - Unauthorized
The issue can be caused if you are accessing the server locally using a custom server name or fully qualified domain name. Windows XP SP2, Windows Server 2003 SP1, and above include a loopback check security feature that is designed to help prevent reflection attacks on your computer. Therefore, authentication fails if the FQDN or the custom host header that you use does not match the local computer name. For more information see the Microsoft article.
- Access the server remotely.
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- Configure the site bindings to allow the server to be accessed using its NetBIOS name or fully qualified domain name.
- or -
- Follow the instructions in the Microsoft article.