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pythonsshparamikonetmiko

Can I get the source port of an ssh connection in netmiko/paramiko?

I have an application where I configure Cisco Routers in a LAB environment through a Console Server.
The routers can be reached via SSH. Sometimes after a program exit/crash the ssh connection is not terminated.
After a restart I cannot login to that specific router while the port on the console server is blocked.
To unblock it I need to terminate that ssh session.
If I have more sessions in use I do not know which of them I need to terminate, so I would like to get the source port when the connection was built by paramiko/netmiko.

Did somebody did this before, or maybe somebody has an idea.

Solution

  • To get the Paramiko SSH connection's underlying socket, use ssh.get_transport().sock. Then, see How do I print the local and remote address and port of a connected socket?

    So usually, this will work:

    port = ssh.get_transport().sock.getsockname()[1]

    But that makes couple of assumptions. As you do not need to use the port number programatically, safer is to just print the complete result of getsockname(), rather than assuming that the result is a tuple with a port at index 1.