Kerberos not working. - Can't find client principal in cache collection

I was able to connect to my windows systems from linux box using domain credentials, when all of a sudden it stopped working. I have tried different accounts and different domains and getting the same error for every account --

""msg": "kerberos: authGSSClientInit() failed: (('Unspecified GSS failure. Minor code may provide more information', 851968), (\"Can't find client principal user@domain in cache collection\", -1765328243))","

The machine is running ubuntu, running Kerberos 5 version 1.12, and I have rebooted it as well. Klist shows that a valid ticket is available. No changes have been made anywhere. Searched on internet and haven't found anything. How do I find out where the problem is?

These packages are installed:

pip (1.5.4) pycrypto (2.6.1) pykerberos (1.1.13) python-apt (0.9.3.5ubuntu2) python-debian (0.1.21-nmu2ubuntu2) python-ntlm3 (1.0.2) pywinrm (0.2.0)

Solution 1:

I had the same issue when I was using the pywinrm library on a linux machine. The solution was to have the domain as upper casing. Example: [email protected].

Hope this helps.