Anybody know of a utility to trace/debug activity at a port?

Discussion in 'Windows Networking' started by jtpryan, Nov 22, 2005.

  1. jtpryan

    jtpryan Guest

    Quite simply, I have a service running on an embedded XP system that
    (should) be listening on port 1300. I have a diagnostic perl utility
    that will test that port by addressing it (from the outside), look for
    a response and respond as to whether it got one or not. For example I
    could pass it the server name and port 80 and it would reply back in
    the affirmative.

    I am not getting a reply back from the port my service is running on.
    But I don't know how to further debug what is going on at the port
    level. As I write this I'm thinking perhaps Ethereal? Anyway, any
    ideas would be appreciated.

    jtpryan, Nov 22, 2005
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  2. jtpryan

    Neteng Guest

    Depending on your switch you could turn on debugging for cef. That will tell
    you if the packet is going to the correct port. It must be a layer3. Or you
    could just try a new switchport. Can you telnet to another TCP port on the
    XP box? Could you temp open a port and try it? That will ensure layers 1-3
    are good.
    Neteng, Nov 23, 2005
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