While tring to fix a pop3 problem I made a X11 forward
ssh -L 1100:mail.mydom.edu:110 mail.mydom.edu
To forward port 110 throug a secure 22 port (thats to try a SSH pop3)
How can I eliminate this X11 forward?
I Know it write in $HOME/..ssh/known_hosts and I think it recongure
iptables, but I don't know if it modify any other file.