forwardOut() fails with Connection refused error with some remote hosts

When I try to forward a local port to a remote host with this module and some hosts refuse to connect and I get the following error (DEBUG):

   Error: (SSH) Channel open failure: Connection refused
       at SSH2Stream.onFailure (c:\vncclient\node_modules\ssh2\lib\client.js:1186:13)
       at Object.onceWrapper (events.js:315:30)
       at emitOne (events.js:116:13)
       at SSH2Stream.emit (events.js:211:7)
       at parsePacket (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:3708:10)
       at SSH2Stream._transform (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:669:13)
       at SSH2Stream.Transform._read (_stream_transform.js:186:10)
       at SSH2Stream._read (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:251:15)
       at SSH2Stream.Transform._write (_stream_transform.js:174:12)
       at doWrite (_stream_writable.js:387:12) +0ms

the ‘ready’ event is hit but then the forwardOut() fails and therefore the sshstream cannot be piped to the connection.

This is my implementation I provide the configuration and wait for the ‘listening’ event and then create a new connection to the tunnel.

   const config = {
        username: 'myuser',
        privateKey: fs.readFileSync('file.ppk'),
        passphrase: 'mypasphrase',
        host: target_host,
        dstPort: 5900,
        localPort: 0,
        localHost: 'localhost',
        readyTimeout: 99999,
        srcHost: 'localhost',
        port: 22,
    };
    sshtunnel = tunnel(config, function (error, server) {
        if (error) {console.log('error');
    });
    sshtunnel.on('listening', function () { 
        net.createConnection(sshtunnel.address().port, sshtunnel.address().address, function () {
        });
 });

The above code works with some hosts but others Refuse, and all host are identical. I already spent 3 full days on this issue.

This is the complete debug output from tunnel-ssh:

  tunnel-ssh sshConnection:ready +224ms
Error found on ssh tunnel: { Error: (SSH) Channel open failure: Connection refused
    at SSH2Stream.onFailure (c:\vncclient\node_modules\ssh2\lib\client.js:1186:13)
    at Object.onceWrapper (events.js:315:30)
    at emitOne (events.js:116:13)
    at SSH2Stream.emit (events.js:211:7)
    at parsePacket (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:3708:10)
    at SSH2Stream._transform (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:669:13)
    at SSH2Stream.Transform._read (_stream_transform.js:186:10)
    at SSH2Stream._read (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:251:15)
    at SSH2Stream.Transform._write (_stream_transform.js:174:12)
    at doWrite (_stream_writable.js:387:12) reason: 'CONNECT_FAILED', lang: '' }
  tunnel-ssh Destination port: { Error: (SSH) Channel open failure: Connection refused
    at SSH2Stream.onFailure (c:\vncclient\node_modules\ssh2\lib\client.js:1186:13)
    at Object.onceWrapper (events.js:315:30)
    at emitOne (events.js:116:13)
    at SSH2Stream.emit (events.js:211:7)
    at parsePacket (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:3708:10)
    at SSH2Stream._transform (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:669:13)
    at SSH2Stream.Transform._read (_stream_transform.js:186:10)
    at SSH2Stream._read (c:\vncclient\node_modules\ssh2-streams\lib\ssh.js:251:15)
    at SSH2Stream.Transform._write (_stream_transform.js:174:12)
    at doWrite (_stream_writable.js:387:12) reason: 'CONNECT_FAILED', lang: '' } +6ms 

I’m running on a windows server 2012 with Node.js version 8.9.0 and the remote hosts are Linux 2.6.15.

[mscdex]

@aberbegall i’d try adding ssh.shell() and then do ssh.forwardOut() inside the shell callback and see if that works.

[agebrock]

Glad you found a solution for you problem.

On 8 November 2017 at 03:25, Agustin Berbegall [e-mail] wrote:

Closed #60 https://github.com/agebrock/tunnel-ssh/issues/60.

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