[jcifs] JCIFS 1.2.1 java.net.UnknownHostException: Failed to negotiate with a suitable domain controller

[Praveen Tammana]

> > Obviously, something is different between our two machines.  My problem is I'm not sure how to debug this kind of problem.  Any thoughts on how to troubleshoot this / things to try?
> 
> Look at the networking setup on the machines. I bet it has something to
> do with that.

I had a very similar problem.  Name resolution would work on my
workstation but on the production server.  The reason turned out to be
iptables (a firewall) running on the production server that blocked a
bunch of ports.  Could your coworker be running some kind of firewall
on his/her machine?

-Praveen