Using the Apple File Protocol to connect to blue

It is not possible to connect to blue.cs.sonoma.edu over the Apple File Protocol (AFP) due to how the campus Firewalls are configured. If you want to mount a share using AFP, you can still do it over an SSH tunnel.

In a terminal where you have access to SSH, do:

sudo ssh blue.cs.sonoma.edu -l yourUsername -L 22:127.0.0.1:548

Then, you can use the following destination as the endpoint to mount the share via AFP:

afp://localhost:22 

To disconnect, unmount the share that you mounted and then type exit in the terminal where you created the ssh tunnel.