CkPython

Send an SSH IGNORE Message

Demonstrates the Chilkat Ssh.SendIgnore method, which sends an SSH IGNORE message. It takes no arguments. The server does not reply, but a successful send helps confirm the connection is still writable. No channel is required.

Background: The SSH IGNORE message is discarded by the peer by design; its usefulness is as a lightweight keep-alive or liveness probe. Because it exercises the actual write path, a successful SendIgnore is stronger evidence than CheckConnection that the link is still usable, without side effects on any channel.

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import sys
import chilkat

success = False

#  Demonstrates the Ssh.SendIgnore method, which sends an SSH IGNORE message.  It takes no
#  arguments.  The server does not reply, but a successful send helps confirm the connection is
#  still writable.  No channel is required.

ssh = chilkat.CkSsh()

#  Connect to the SSH server.  Port 22 is the usual SSH port.
sshPort = 22
success = ssh.Connect("ssh.example.com",sshPort)
if (success == False):
    print(ssh.lastErrorText())
    sys.exit()

#  Normally you would not hard-code the password in source.  You should instead obtain it
#  from an interactive prompt, environment variable, or a secrets vault.
password = "mySshPassword"

success = ssh.AuthenticatePw("mySshLogin",password)
if (success == False):
    print(ssh.lastErrorText())
    sys.exit()

#  Send an IGNORE message to verify the connection is still writable.
success = ssh.SendIgnore()
if (success == False):
    print(ssh.lastErrorText())
    sys.exit()

print("IGNORE message sent.")

ssh.Disconnect()