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(Visual FoxPro) 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
LOCAL loSsh1 LOCAL lcHostname LOCAL lcPort LOCAL lnSuccess LOCAL loSsh2 LOCAL lnChannelNum * This example assumes the Chilkat API to have been previously unlocked. * See Global Unlock Sample for sample code. * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Ssh') loSsh1 = CreateObject('Chilkat.Ssh') * Hostname may be an IP address or domain name: lcHostname = "192.168.1.108" lcPort = 22 * Connect directly to the 1st SSH server: lnSuccess = loSsh1.Connect(lcHostname,lcPort) IF (lnSuccess <> 1) THEN ? loSsh1.LastErrorText RELEASE loSsh1 CANCEL ENDIF * Wait a max of 15 seconds when reading responses.. loSsh1.IdleTimeoutMs = 15000 * Authenticate using login/password: lnSuccess = loSsh1.AuthenticatePw("myLogin","myPassword") IF (lnSuccess <> 1) THEN ? loSsh1.LastErrorText RELEASE loSsh1 CANCEL ENDIF * 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. * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Ssh') loSsh2 = CreateObject('Chilkat.Ssh') lnSuccess = loSsh2.ConnectThroughSsh(loSsh1,"someremoteserver.com",22) IF (lnSuccess <> 1) THEN ? loSsh2.LastErrorText RELEASE loSsh1 RELEASE loSsh2 CANCEL ENDIF loSsh2.IdleTimeoutMs = 15000 * Authenticate with ssh2... lnSuccess = loSsh2.AuthenticatePw("myLogin2","myPassword2") IF (lnSuccess <> 1) THEN ? loSsh2.LastErrorText RELEASE loSsh1 RELEASE loSsh2 CANCEL ENDIF * 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.. lnChannelNum = loSsh2.OpenSessionChannel() IF (lnChannelNum < 0) THEN ? loSsh2.LastErrorText RELEASE loSsh1 RELEASE loSsh2 CANCEL ENDIF * ... * ... * ... * 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. loSsh2.Disconnect() * ... * ... * ... loSsh1.Disconnect() RELEASE loSsh1 RELEASE loSsh2 |
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