At noon today, port 3389 will be blocked for both on- and off-campus communication. This port is most commonly used for Windows remote desktop protocol. We are taking this measure to help prevent the proliferation of a recent worm, Morto, that uses this protocol to spread. This block will NOT affect VPN users. If you are currently connecting to a computer from off campus, you will need to be sure to use the VPN client, which you can get (if you are already off-campus) from https://cuvpn1.creighton.edu.
One other thing to note is that this worm (currently) uses a brute-force mechanism to log in using a pre-defined list of passwords. As such, the best prevention is to make sure you have a strong password for all of your accounts.