SSH Connection timed out

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http://crunchbang.org – Hello.I installed #! a couple of days ago.  I have figured out a bunch of things myself, but this issue is perplexing.I wanted to be able to SSH into my home computer while I was at school.  I installed openssh-server, and I can log into localhost using ssh.  However, I cannot log in using putty from my laptop while at school or on my home network using the external IP I get from sources like whatismyip.com, and google.  I can log in using the local network IP, which I got from using ifconfig, however, so I know that the sshd is running and "working".The strange t (HowTos)