Eu uso ssh -L -g , mas intermitentemente a conexão é perdida, assim:
$ ssh -L 8080:localhost:8080 example.com -g
Last login: Tue Apr 24 07:19:04 2012 from 203.0.113.123
Read from remote host example.com: Connection timed out
Connection to e...
25.04.2012 / 04:20