Port forwarding and PC listening question

From: Roy Hampton (Roy.W.Hampton_at_nasa.gov)
Date: 01/13/04

  • Next message: Caron, Jim: "RE: file permissions for new folder" 
    Date: Tue, 13 Jan 2004 10:20:24 -0800
To: secureshell@securityfocus.com

    People:
    I hope someone can give me a boost.
    I am trying to use OpenSSH in cygwin environment to access unix machines
    from a windows 2000 PC, and to use port forwarding to obtain a license for
    operation of software using flexlm license server on the remote unix machine.

    I have done this just fine in the past with TTERMPRO with ttssh, using the
    command
    DefaultForwarding=X;Lwin_port:host:host_port where win_port is the port on
    my windows machine, and host is the remote unix box, where the license is
    served on host_port. I have an environment variable on my PC machine
    "dual" which aims the licence environment variable for flexlm at win_port@dual

    Now, I have to convert to use SSH version 2 to access through the firewalls
    at NASA, and have to change to something with SSH v2.

    I installed cygwin with OpenSSH, and have successfully connected to the
    remote unix machine, using the ssh command:
    ssh -l username -X -v -v -v -Lwin_port:host:host_port host, where win_port
    is the port number on my PC, etc.
    ssh verbose mode tells me

    "debug1: Connections to local port xxxx forwarded to remote address
    host:host_port"
    "debug1: Local forwarding listening on 127.0.0.1 port win_port"

    [where I replaced actual port numbers, host name, etc. in above text with
    win_port, host, etc. for security reasons]

    When I try to start the software needing to find the flexlm license at
    win_port it does not find it.

    I suspect the cygwin or OpenSSH has to explicitly connect the 127.0.0.1
    localhost to the PC network somehow, but I don't know how to do it.

    Suggestions?
    Roy

  • Next message: Caron, Jim: "RE: file permissions for new folder"

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