Our sharpoint site is running on sharepoint 2010 SP2 with the latest CU installed.
One morning we started getting calls from users saying that they couldn't access our sharepoint site. We tried logging in from our computers and from the server and cannot connect to it. We get a pop up that asks for credentials. No matter what credentials we put in, it will not allow us to connect. It is noteworthy that we CAN connect to the sharepoint central administration site, as well the sharepoint user "My sites" that use a different port number.
We have created test sites through IIS to see if it is an IIS problem. Our test sites are working. We can connect to them and authentication works.
We have also applied some registry changes that were suggested in the below KB.
Applying those registry changes did not fix the problem.
Before this problem started happening, we did not make any changes to that server, or to our network.
We would greatly appreciate any insight you could provide to help us with this problem. Thank you.