Networking :: Use Ssh / Scp Between One Computer At Home And Another At Work?

I would like to use ssh / scp between one computer at home and another at work. I can do it from home to work, but not the opposite. I think my home IP address starts with 82., is that ok? The one at work starts with 130. Here some terminal commands i launched (I cannot fully understand them). I also used a site of the internet provider, first to add rules (eg allow this and that IP address), then to disabled the firewall. The /etc/ssh/sshd_config of the two computers are the same.

Code:

sudo apt-get install ssh openssh-server
sudo /etc/init.d/ssh start
sudo iptables -A INPUT -p tcp -d 0/0 -s 0/0 --dport 22 -j ACCEPT

[code]....