"could not accept SSPI security context"

[Reto Schöning <reto.schoening@xxxxxxxxx>]

Hi,

I've set up 8.3 to use SSPI for authentication (clients and server on windows XP). I can successfully connect from clients using psql and another db client using SSPI authentication. However when trying to connect with Npgsql (2.0.11) as the same user, the following error occurs:

   "could not accept SSPI security context"

The same type of connection succeeds when connecting locally from the db server. The problem only affects connection attempts on client machines, and (currently) only when connecting from a .Net application using Npgsql. However the same error also showed up when connecting with psql initially. Now that works, and I'm not sure what change made that error disappear.

Can anyone help me understand that error? What circumstances can lead to this? 

Thanks,

Reto