The only requirement is that you have SSH access to the remote system and, ideally, public key authentication configured for password-less SSHing. SSH port forwarding will allow you to access remote resources by just establishing an SSH tunnel. The two are similar, but creating ssh tunnels is for specific traffic, whereas VPNs are more for establishing general connections. You may be thinking this sounds like a VPN. It’s also popular to use it to connect to a local network from the outside-for example, an employee using SSH tunnels to connect to a company’s intranet. This holds especially true for legacy applications. Since SSH creates encrypted connections, this is an ideal solution if you have applications that transmit data in plaintext or use an unencrypted protocol. We cover the details later in the tutorial. You’ll need an extra program for this called sshuttle. You can use SSH port forwarding to set up a virtual private network (VPN). The most common use for this is for private web browsing or to make your connection seemingly originate from a different country or location. You can configure applications to connect to the proxy and transmit all data through it. An SSH tunnel is established, but the remote system is able to access your local network.ĭynamic port forwarding sets up a SOCKS proxy server. Remote port forwarding is the exact opposite. An SSH tunnel is established to a remote system, and traffic from the local network can use that tunnel to transmit data back and forth, accessing the remote system and network as if it was a part of the local network. Local port forwarding is used to make an external resource available on the local network. Each configuration requires its own steps to set up, so we will go over each of them later in the tutorial. There are a few different things you can do with this: local forwarding, remote forwarding, and dynamic port forwarding. To put it simply, SSH port forwarding involves establishing an SSH tunnel between two or more systems and then configuring the systems to transmit a specified type of traffic through that connection. 6 Persistent SSH tunnels (Using Autossh).
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