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(VB.NET UWP/WinRT) 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 Chilkat.Ssh ' Hostname may be an IP address or domain name: Dim hostname As String = "192.168.1.108" Dim port As String = 22 ' Connect directly to the 1st SSH server: Dim success As Boolean = Await ssh1.ConnectAsync(hostname,port) If (success <> True) Then Debug.WriteLine(ssh1.LastErrorText) Exit Sub End If ' Wait a max of 15 seconds when reading responses.. ssh1.IdleTimeoutMs = 15000 ' Authenticate using login/password: success = Await ssh1.AuthenticatePwAsync("myLogin","myPassword") If (success <> True) Then Debug.WriteLine(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 Chilkat.Ssh success = Await ssh2.ConnectThroughSshAsync(ssh1,"someremoteserver.com",22) If (success <> True) Then Debug.WriteLine(ssh2.LastErrorText) Exit Sub End If ssh2.IdleTimeoutMs = 15000 ' Authenticate with ssh2... success = Await ssh2.AuthenticatePwAsync("myLogin2","myPassword2") If (success <> True) Then Debug.WriteLine(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 Integer = Await ssh2.OpenSessionChannelAsync() If (channelNum < 0) Then Debug.WriteLine(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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