C#

SSH Tunnel for Database Connection (such as ADO, ODBC, JDBC, etc.)

See more SSH Tunnel Examples

Demonstrates how to create an SSH tunneling client in a background thread of your application. This makes it possible to SSH tunnel database connections without the need for separate software (such as PuTTY) to be running. C#

bool success = false;

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

success = false;

Chilkat.SshTunnel tunnel = new Chilkat.SshTunnel();

string sshHostname = "sftp.example.com";
int sshPort = 22;

//  Connect to an SSH server and establish the SSH tunnel:
success = tunnel.Connect(sshHostname,sshPort);
if (success != true) {
    Debug.WriteLine(tunnel.LastErrorText);
    return;
}

//  Authenticate with the SSH server via a login/password
//  or with a public key.  
//  This example demonstrates SSH password authentication.
success = tunnel.AuthenticatePw("mySshLogin","mySshPassword");
if (success != true) {
    Debug.WriteLine(tunnel.LastErrorText);
    return;
}

//  The destination host/port is the database server.
//  The DestHostname may be the domain name or 
//  IP address (in dotted decimal notation) of the database
//  server.
tunnel.DestPort = 1433;
tunnel.DestHostname = "myDbServer.com";

//  Start accepting connections in a background thread.
//  The SSH tunnels are autonomously run in a background
//  thread.  There is one background thread for accepting
//  connections, and another for managing the tunnel pool.
int listenPort = 3316;
success = tunnel.BeginAccepting(listenPort);
if (success != true) {
    Debug.WriteLine(tunnel.LastErrorText);
    return;
}

//  At this point the app may connect to the database server through
//  the SSH tunnel.  The database connection string would
//  use "localhost" for the hostname and 3316 for the port.
//  We're not going to show the database coding here,
//  because it can vary depending on the API you're using
//  (ADO, ODBC, OLE DB, etc. )

//  This is where the application's database code would go...

//  Stop the background listen/accept thread:
bool waitForThreadExit = true;
success = tunnel.StopAccepting(waitForThreadExit);
if (success != true) {
    Debug.WriteLine(tunnel.LastErrorText);
    return;
}

//  Close the SSH tunnel (would also kick any remaining connected clients).
success = tunnel.CloseTunnel(waitForThreadExit);
if (success != true) {
    Debug.WriteLine(tunnel.LastErrorText);
    return;
}