Chilkat2-Python

SSH Tunnel Thread Activity Log

Demonstrates the tunnel-log properties KeepTunnelLog, TunnelLog, and TunnelLogPath, which record the activity of the SSH tunnel and client-manager threads.

Note: The log paths are relative to the application's current working directory. Absolute paths may also be used.

Background: This is the counterpart to the accept log, covering the SSH side rather than the listener: the tunnel and client-manager threads that actually move data. As with the accept log, KeepTunnelLog enables the in-memory TunnelLog while TunnelLogPath writes a separate file. Together the two logs let you localize a problem to either the accepting side or the forwarding side.

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import sys
import chilkat2

success = False

# Demonstrates the SshTunnel tunnel-log properties KeepTunnelLog, TunnelLog, and TunnelLogPath.
# 
# These log the activity of the SSH tunnel and client-manager threads.

tunnel = chilkat2.SshTunnel()

# Retain the SSH tunnel-thread activity in memory so it can be read from the TunnelLog property.
tunnel.KeepTunnelLog = True

# Optionally also write the tunnel-thread activity to a file (separate from the in-memory log).
tunnel.TunnelLogPath = "qa_output/tunnel.log"

tunnel.DestHostname = "db.internal.example.com"
tunnel.DestPort = 5432

sshPort = 22
success = tunnel.Connect("ssh.example.com",sshPort)
if (success == False):
    print(tunnel.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 = tunnel.AuthenticatePw("mySshLogin",password)
if (success == False):
    print(tunnel.LastErrorText)
    sys.exit()

listenPort = 1080
success = tunnel.BeginAccepting(listenPort)
if (success == False):
    print(tunnel.LastErrorText)
    sys.exit()

# ... clients transfer data through the tunnel ...

# Read the accumulated in-memory tunnel log.
print(tunnel.TunnelLog)

waitForThreadExit = True
success = tunnel.CloseTunnel(waitForThreadExit)
if (success == False):
    print(tunnel.LastErrorText)
    sys.exit()