We changed the password for controls on nodus this afternoon. We also zeroed out the authorized_keys file and then added back in the couple that we want in there for automatic backups / detchar.
Also did the recommended Ubuntu updates on there. Everything seems to be going OK so far. We think nothing on the interferometer side cares about the nodus password.
We also decided to dis-allow personal laptops on the new Martian router (to be installed soon).