On januari 12-th 2015, the fwn0.housing.rug.nl servers have been installed with the new LWP
This also means new ssh-keys, and consequently the first time you log in you get a threatening warning like:
WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED
The warning can be ignored, but you have to follow the given instructions to be able to continue.
You effectively have to tell your computer that the remote machine can be trusted.