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

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.

Download Excel Class Modules Chilkat Excel Class Modules

Dim chilkatGlob As Chilkat.CkGlobal
Set chilkatGlob = Chilkat.NewCkGlobal

success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> True) Then
    Debug.Print chilkatGlob.LastErrorText
    Exit Sub
End If

Dim tunnel As Chilkat.SshTunnel
Set tunnel = Chilkat.NewSshTunnel


sshHostname = "www.my-ssh-server.com"

sshPort = 22

'  Connect to an SSH server and establish the SSH tunnel:
success = tunnel.Connect(sshHostname,sshPort)
If (success <> True) Then
    Debug.Print tunnel.LastErrorText
    Exit Sub
End If

'  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) Then
    Debug.Print tunnel.LastErrorText
    Exit Sub
End If

'  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.

listenPort = 3316
success = tunnel.BeginAccepting(listenPort)
If (success <> True) Then
    Debug.Print tunnel.LastErrorText
    Exit Sub
End If

'  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:

waitForThreadExit = True
success = tunnel.StopAccepting(waitForThreadExit)
If (success <> True) Then
    Debug.Print tunnel.LastErrorText
    Exit Sub
End If

'  Close the SSH tunnel (would also kick any remaining connected clients).
success = tunnel.CloseTunnel(waitForThreadExit)
If (success <> True) Then
    Debug.Print tunnel.LastErrorText
    Exit Sub
End If