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(Visual Basic 6.0) Multi-Hop SSH (SSH Through SSH)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
' This example assumes the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. Dim ssh1 As New ChilkatSsh ' Hostname may be an IP address or domain name: Dim hostname As String hostname = "192.168.1.108" Dim port As String port = 22 ' Connect directly to the 1st SSH server: Dim success As Long success = ssh1.Connect(hostname,port) If (success <> 1) Then Debug.Print ssh1.LastErrorText Exit Sub End If ' Wait a max of 15 seconds when reading responses.. ssh1.IdleTimeoutMs = 15000 ' Authenticate using login/password: success = ssh1.AuthenticatePw("myLogin","myPassword") If (success <> 1) Then Debug.Print ssh1.LastErrorText Exit Sub End If ' 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. Dim ssh2 As New ChilkatSsh success = ssh2.ConnectThroughSsh(ssh1,"someremoteserver.com",22) If (success <> 1) Then Debug.Print ssh2.LastErrorText Exit Sub End If ssh2.IdleTimeoutMs = 15000 ' Authenticate with ssh2... success = ssh2.AuthenticatePw("myLogin2","myPassword2") If (success <> 1) Then Debug.Print ssh2.LastErrorText Exit Sub End If ' 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.. Dim channelNum As Long channelNum = ssh2.OpenSessionChannel() If (channelNum < 0) Then Debug.Print ssh2.LastErrorText Exit Sub End If ' ... ' ... ' ... ' 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 |
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