[uug] ssh... tunneling?

[Wade Preston Shearer]

follow me...

box A (a web server) is at location A and can only be logged into from 
a box at location B (for security). all of the boxes at location B are 
behind a firewall, except one, box B1 (a mail server). one of the 
sweetest things about ssh/terminals is that i can be on laptop C 
anywhere, ssh into box B1, ssh into box B2 (a file server), and then 
transfer files from B2 to A.

my question is... what do you need to do to transfer files straight 
from laptop C to box A? i think that the ability to transfer between 
these two boxes, as if they were connected on to the other, without the 
other stops (boxes) between, is possible, but don't have any idea how. 
is this what tunneling is called?

how do you do that?

-wade



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