what is ssh tunneling code example

Example 1: port forwarding linux

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

Example 2: port forwarding linux

sudo nano /etc/sysctl.conf
# UNCOMMENT `net.ipv4.ip_forward=1`
#AFTER, EXECUTE THESE COMMANDS
sudo sysctl -p
sudo sysctl --system

Example 3: ssh tunnel port

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

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