ssh $username@$server # E.g: ssh firstname.lastname@example.org
You cannot access Ponyland directly from outside the RU network. The Ponyland server
applejack is open to the entire internet, however, and from there the ponies are reachable. In Linux commands:
ssh -t $email@example.com ssh $server
If you cannot use a separate login server for some reason, the alternative is to make the ponies think you are inside the RU network. This can be done by setting up a Virtual Private Network.