Sshconfig
From Attie's Wiki
The following is an example ~/.ssh/config
file.
Host dev HostName dev.example.com Port 22000 User attie IdentityFile ~/.ssh/attie@dev.example.com LocalForward 9906 127.0.0.1:3306 ServerAliveInterval 300 ServerAliveCountMax 2 ProxyCommand ssh user@accessible.com nc %h %p