[Lug-nuts] Basic SSH

So, my eyes grow weary of google nonsense. But is there ever a way to use anything other than: ssh -L xxxx:localhost:yyyy server.com or ssh -L xxxx:server.com:yyyy server.com for example ssh -L xxxx:anotherserver.com:yyyy server.com for example when there are firewalls. How would it work? Certificates only? I'd like to use a password on anotherserver.com I know I could get what I want using a double login and chaining ports. But, it seems like a real waste if the :localhost: is just to tickle the bind addresses on the server. -Gary