ssh "-l" code example

Example 1: port forwarding linux

echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward
# ENABLES IP FORWARDING TEMPORARILY

Example 2: how to enable the port mapping to the SSH port windos

ssh -R remote_port:localhost:local_port ssh_server_hostname

Example 3: ssh tunnel port

ssh -L 80:intra.example.com:80 gw.example.com