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(CkPython) 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 126.96.36.199 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
import sys import chilkat # This example assumes the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. ssh1 = chilkat.CkSsh() # Hostname may be an IP address or domain name: hostname = "192.168.1.108" port = 22 # Connect directly to the 1st SSH server: success = ssh1.Connect(hostname,port) if (success != True): print(ssh1.lastErrorText()) sys.exit() # Wait a max of 15 seconds when reading responses.. ssh1.put_IdleTimeoutMs(15000) # Authenticate using login/password: success = ssh1.AuthenticatePw("myLogin","myPassword") if (success != True): print(ssh1.lastErrorText()) sys.exit() # 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. ssh2 = chilkat.CkSsh() success = ssh2.ConnectThroughSsh(ssh1,"someremoteserver.com",22) if (success != True): print(ssh2.lastErrorText()) sys.exit() ssh2.put_IdleTimeoutMs(15000) # Authenticate with ssh2... success = ssh2.AuthenticatePw("myLogin2","myPassword2") if (success != True): print(ssh2.lastErrorText()) sys.exit() # 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.. channelNum = ssh2.OpenSessionChannel() if (channelNum < 0): print(ssh2.lastErrorText()) sys.exit() # ... # ... # ... # 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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