Asset Server login failing for one computer only

We have an asset server set up and we’re connecting to it through an SSH tunnel. It works great for everyone in our office except for a single machine. That machine can easily get the SSH tunnel up and running and can also connect to the asset server, but no matter what we try with this specific machine it tells us that the login information is invalid (even when using the same username as other machines that can easily connect).

Connection failed
password authentication failed for user "xxxx"

Any ideas?

Perhaps an Issue with the firewall? Sounds pretty like that if it happens only to one machine in your company/place :).
regards

There’s no firewall and it’s behind the exact same network as every other machine.