Reverse SSH Tunneling

1. Working Mechanism of Reverse SSH Tunneling
2. Reverse Tunneling With SSH
3. Construct an SSH Tunnel in the Reverse

You can utilize that established connection to create a new connection via reverse SSH tunneling from your local computer to the remote computer.

Because the connection was established from the distant computer to you, using it in the other manner is referred to as “in reverse”.

You’re also establishing a secure connection inside an existing secure connection because SSH is secure. It means that your remote computer connection functions as a private tunnel within the original connection.

Working Mechanism of Reverse SSH Tunneling

The remote computer uses the established connection to listen for additional connection requests from the local machine in reverse SSH tunneling.

On the local computer, the remote machine listens on a network port. It sends the connection request down the http connection back to itself if it detects an SSH request for that port.

It establishes a new connection between the local and remote computers.

Reverse Tunneling With SSH

You need to install the OpenSSH server before using it, but you haven’t done so yet. Install the OpenSSH server to resolve the issue.

$ sudo apt install openssh-server

If the local machine has never previously accepted SSH connections, you may need to activate the SSH daemon sshd.

$ sudo systemctl start sshd

Construct an SSH Tunnel in the Reverse

We can use the ssh command to connect to a remote server.

$ ssh [your-account-login]@[server-ip]

Once you’ve formed the connection, a person on the remote server-side, such as a system administrator, should run the following command.

$ ssh -fN -R 8080:localhost:92 username@yourMachine-ipaddress.

SSH connection requests for port 8080 on your system will be sent to port 92 on the remote server with this connection request. Request for an SSH connection from your machine to your machine.

You’ll establish a connection to port 8000 in this phase.

$ ssh username@localhost -p 8000

Your request will then be forwarded to the remote server. As a result, when requested for these details, use your remote server account login and password.

You can also use SSH keys to make connecting from a remote computer to a local computer more secure. Type the following command on the remote computer.

$ ssh-keygen

To construct a secure password, use four words separated by symbols and ensure that only those who know the phrase can access your computer over SSH without asking for a password.

You must also use the ssh-copy-id username@localhost command to copy the created key to your local computer.