“Error Code: 403 Forbidden. ISA Server is configured to block HTTP requests that require authentication. (12250)” hatası

Http trafigi için, Isa publishing rule üzerinde Pass-through authentication (“No Delegation and Client may authenticate directly”’ seçeneginden ziyade; örnegin, ISA Basic Authentication pass-through yapiyorsa) kullaniyorsak; Listener->Authentication->Advanced Tab’ inda “Allow client authentication over HTTP” check box’ inin isaretli oldugundan emin olalim.

http://support.microsoft.com/kb/924374