I installed DirectAccess about a month ago and everything has been very solid with no issues. Starting yesterday the only way a user can connect to Direct Access using a broadband device is disabling 6to4 on clients computer. I have tested with multiple computers and same thing. Any thoughts on why I have to disable 6to4 (netsh int 6to4 set state disabled) before a user can connect to DA? It was working great before.
Server: 2012 R2
Clients: Windows 7