Chilkat2-Python

Multi-Hop SSH (SSH Through SSH)

See more SSH Examples

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

Chilkat2-Python

import sys
import chilkat2

success = False

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

ssh1 = chilkat2.Ssh()

# 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.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 = chilkat2.Ssh()
success = ssh2.ConnectThroughSsh(ssh1,"someremoteserver.com",22)
if (success != True):
    print(ssh2.LastErrorText)
    sys.exit()

ssh2.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()