SSH tunneling (also referred to as SSH port forwarding) is simply routing local network traffic through SSH to remote hosts. This implies that all your connections are secured using encryption. It provides an easy way of setting up a basic VPN (Virtual Private Network), useful for connecting to private networks over unsecure public networks like the Internet.

You may also be used to expose local servers behind NATs and firewalls to the Internet over secure tunnels, as implemented in ngrok.

SSH sessions permit tunneling network connections by default and there are three types of SSH port forwarding: local, remote and dynamic port forwarding.

In this article, we will demonstrate how to quickly and easily setup a SSH tunneling or the different types of port forwarding in Linux.

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