ssh -R *:80:localhost:80 root@public-host-domain -v -N

http://souptonuts.sourceforge.net/sshtips.htm

This allow serve web pages to internet behind a firewall, using a linux server with a public IP address running sshd.
We must have root credentials and sshd configured with: GatewayPorts yes

Remote port forwarding with ssh/putty

ssh

Bash