Node.js

Multi-Hop SSH (SSH Through SSH)

See more SSH Examples

Demonstrates how to SSH through one SSH server to get to another SSH server. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2

The ConnectThroughSsh method is added in Chilkat version 9.5.0.55 to accomplish this task. Technically, it should be possible to chain any number of servers using the ConnectThroughSsh multiple times:

Application => ServerSSH1 => ServerSSH2 ==> ServerSSH3 => ... => ServerSSHN

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  This example assumes the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    var ssh1 = new chilkat.Ssh();

    //  Hostname may be an IP address or domain name:
    var hostname = "192.168.1.108";
    var port = 22;

    //  Connect directly to the 1st SSH server:
    success = ssh1.Connect(hostname,port);
    if (success !== true) {
        console.log(ssh1.LastErrorText);
        return;
    }

    //  Wait a max of 15 seconds when reading responses..
    ssh1.IdleTimeoutMs = 15000;

    //  Authenticate using login/password:
    success = ssh1.AuthenticatePw("myLogin","myPassword");
    if (success !== true) {
        console.log(ssh1.LastErrorText);
        return;
    }

    //  Connect through the 1st SSH connection to reach a 2nd SSH server.
    //  Note: Any number of SSH connections may be simultaneously tunneled through a single
    //  existing SSH connection.
    var ssh2 = new chilkat.Ssh();
    success = ssh2.ConnectThroughSsh(ssh1,"someremoteserver.com",22);
    if (success !== true) {
        console.log(ssh2.LastErrorText);
        return;
    }

    ssh2.IdleTimeoutMs = 15000;

    //  Authenticate with ssh2...
    success = ssh2.AuthenticatePw("myLogin2","myPassword2");
    if (success !== true) {
        console.log(ssh2.LastErrorText);
        return;
    }

    //  The application may now is connected and authenticated with ssh2.
    //  The application can do whatever it desires just as if it was directly
    //  connected to ssh2.   For example, the application might open
    //  a session channel to send commands or start a remote shell..
    var channelNum = ssh2.OpenSessionChannel();
    if (channelNum < 0) {
        console.log(ssh2.LastErrorText);
        return;
    }

    //  ...
    //  ...
    //  ...

    //  Close the connection with ssh2.  (This closes the the tunnel through ssh1.)
    //  The connection with ssh1 is still alive, and may be used for more connections.
    ssh2.Disconnect();

    //  ...
    //  ...
    //  ...

    ssh1.Disconnect();

}

chilkatExample();