JavaScript

Open an SSH Tunnel

Demonstrates Socket.SshOpenTunnel, which connects to an SSH server and initializes an SSH tunneling session, then authenticates it.

Background. An SSH tunnel lets a socket reach a destination host through an SSH server using port forwarding. The sequence is: open the tunnel, authenticate, then open forwarded channels to destinations.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

var socket = new CkSocket();

//  Connect to the SSH server and initialize an SSH tunneling session.  Port 22 is conventional but
//  not required.
success = socket.SshOpenTunnel("ssh.example.com",22);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

//  After the tunnel is open, authenticate before opening forwarded channels.
//  The SSH password should come from a secure source rather than being hard-coded.
var sshPassword = "mySshPassword";
success = socket.SshAuthenticatePw("sshUser",sshPassword);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

console.log("SSH tunnel established and authenticated.");