For instructions on how to enable authentication on IIS, please refer to this KB article. Scroll down in the article in order to see the instructions for IIS 7.0 and higher.
After turning off anonymous authentication, you'll need to activate one of the other authentication methods, preferrably "Windows Authentication".
For instructions on how to enable authentication on IIS, please refer to this KB article. Scroll down in the article in order to see the instructions for IIS 7.0 and higher.
After turning off anonymous authentication, you'll need to activate one of the other authentication methods, preferrably "Windows Authentication".