On: SSH Multiplexing & other OpenSSH Tricks

[fragmede]

'-t' is also useful if you have machines behind a NAT you want to get to: ssh -t gateway.example.com ssh protected_machine

[mooism2 → fragmede]

Or you could add the following to your ~/.ssh/config instead:

    Host protected_machine other_protected_machine
    ProxyCommand /usr/bin/ssh gateway.example.com /bin/nc -w 3700 %h %p

(Assumes you have /bin/nc installed on your gateway.)