Debian :: Access Server Through Ssh?

I want to acces my debian server through ssh.

I have a firewall at home which wont allow connections from alot of ports including 22, 80, 8080 To fix this on LAN i made ssh listen on port 1234 (found on isp forum that it didnt block that port and it's easy to remember ), that works at home, also on the wired network in school.

So I think the school blocks the ports of the wireless network except 22, 80, 8080.

Now my first idea i had to fix this is to install hamachi. which I will be testing the next week.

(easy problem: i have this .sh file in my cron.hourly & init.d, they wont do their job. I didnt set any permissions but i made them with root, those files update my ip to freedns)

I also cannot get onto my website, when i am not in my LAN...