For example, dynamic port forwarding lets you bypass a company firewall that blocks web access altogether. Each program that uses the proxy server needs to be configured specifically, and reconfigured when you stop using the proxy server. It is a less common type of port forwarding.ĭynamic port forwarding: The connections from various programs are forwarded via the SSH client, then via the SSH server, and finally to several destination servers. For example, you could connect from your SSH server to a computer on your company's intranet. Remote port forwarding lets you connect from the remote SSH server to another server. Remote port forwarding: The connections from the SSH server are forwarded via the SSH client, then to a destination server. It is the most used type of port forwarding. For example, you could use the local port forwarding to bypass a company firewall to connect to your client. Local port forwarding lets you connect from your local computer to another server. There are three ways to create an SSH tunnel: Local port forwarding: The connections from the SSH client are forwarded via the SSH server, then to a destination server.

SSH tunnels also provide a means to bypass firewalls that prohibit or filter certain internet services. It could also be useful when connecting a client through an SSH server protected by a firewall. The SSH Tunnel can be used to establish a form of a virtual private network (VPN), and since the connection is encrypted, it can be useful for transferring unencrypted traffic over a network through an encrypted channel.įor example, we can use an SSH Tunnel to securely transfer files between a FTP server and a client even though the FTP protocol itself is not encrypted. It’s basically an encrypted tunnel created through an SSH protocol connection. Some people call this device a Jump or server. SSH tunneling is used to create a secure connection between a local and a remote computer, by going through another device that relays a specific service.

What does it do exactly? When do you need it? What does it eat in winter? How do you actually set it up? Let’s take a deeper look at it! We often receive questions about our SSH Tunnel entry.

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