I always have to look this up when I want to use it.

# $LOCAL_IP: 'localhost' or machine from local network
# $LOCAL_PORT: open port on local machine
# $REMOTE_IP: remote localhost or IP from remote network
# $REMOTE_PORT: open port on remote site

# Forward Tunnel: map port from remote machine/network on local machine

# Reverse Tunnel: make local port accessable to remote machine
ssh -R $REMOTE_PORT:$LOCAL_IP:$LOCAL_PORT [email protected]$SERVER