<code>
The problem:

my-laptop --- my-firewall --- internet --- miguel-angel's-firewall --- my-desktop-box 
\______Mexico City______/                  \_________________Xalapa_________________/
	    

I'm in my-laptop. My Evolution data is in my-desktop-box, and I need to copy it back to my-laptop. Mike's beautiful solution is this:

my-laptop$ ssh -f -N -P -L 2222:my-desktop-box:22 miguel-angel's-firewall
my-laptop$ rsync -vaz --delete -e 'ssh -x -P -p 2222' localhost:~/evolution ~

So we get an ssh that rsync runs over an ssh tunnel. I'm delighted. I can also do

my-laptop$ ssh -p 2222 localhost
my-desktop-box$

Which is plain elegant.
</code>
http://primates.ximian.com/~federico/news-2003-10.html#30 파이어월안에 있는 컴퓨터 쉽게 조작하기. -_-;; 역시 멋져. [Unix가밉다] 라고 한것 취소! 잘써먹겠군 ㅎㅎ