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  1. #1
    New Lounger
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    Which task is producing network traffic

    Does anyone know how I can determine which application or task is producing network traffic through my LAN card?
    I have a Win XP system which is showing the network icon in the system tray. The icons are continuously flashing indicating network send and receive however I have no obvious application that should be producing this traffic.

    Any assistance would be greatly appreciated.
    Thank you.

  2. #2
    Super Moderator jscher2000's Avatar
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    Re: Which task is producing network traffic

    Do you have any kind of software firewall installed? Some produce detailed logs, while others allow you to lock out or allow individual applications (which would let you identify the relevant application by trial and error).

    The Processes tab of the task manager displays I/O activity and memory usage (you can add these fields if they are not already visible). There's no direct correlation with network activity, but it at least suggests which applications might be most active.

    Oh, do you have Automatic Updates enabled? Maybe your computer is retrieving the huge Windows XP SP2 update??

  3. #3
    New Lounger
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    Re: Which task is producing network traffic

    Thank you for your very quick reply.
    Unfortunately I don't have any kind of firewall software installed.
    I do not have auto updates enabled so it is not that.

    I guess I was hoping there was some sort of "magic" command or in built software that would show me something like: task, bytes in, bytes out, etc.
    Wishful thinking

    Thanks again for your time in answering this.

  4. #4
    Plutonium Lounger Leif's Avatar
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    Re: Which task is producing network traffic

    What operating system are you running?
    Are you on a local network?
    Have you run virus and spyware scans?

  5. #5
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    Re: Which task is producing network traffic

    Leif, thank you for your reply...

    Windows XP
    Yes, on a LAN
    Yes, I am clear of virus and spyware.
    It is no doubt a legitimate process that is causing the traffic, I just wanted a method of finding out which one (without doing process of elimination routines). As a tech support person, it strikes me as a useful tool to have something that you could run on a system to display such information.

  6. #6
    Super Moderator jscher2000's Avatar
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    Re: Which task is producing network traffic

    Nothing built in, I'm afraid. Just today, though, Joe Perez let us in on Microsoft's Port Reporter tool in this post: <post#=405855>post 405855</post#>. Maybe you can try it out?

  7. #7
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    Re: Which task is producing network traffic

    Although Joe didn't mention it specifically, in that TechNet article they have carefully hidden information about a reporting program to work on the voluminous output from Port Reporter, and also a command line tool for monitoring a single port, with a yet further program to act as a GUI interface for the command line program!

    There's just got to be something in that lot to help you!

    John
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    Ita, esto, quidcumque...

  8. #8
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    Re: Which task is producing network traffic

    <hr>...Unfortunately I don't have any kind of firewall software installed... <hr>
    May I suggest that you rectify that as soon as possible. As Jefferson said, most firewall software produces logs that will tell you "something" about network traffic. If you're on a LAN, it could be the browse master machine, router or switch, checking the status of each machine. It could also be programs like your clock synch software, antivirus software and on and on, if you have them, checking THEIR sites for updates. Try giving <!post=this thread,394297>this thread<!/post> a look for some suggestions.

  9. #9
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    Re: Which task is producing network traffic

    Sounds like you want a network sniffer.

    The good news is that their is a good free one. http://www.ethereal.com/

    The bad news is that it's a bit complicated to learn how to run it.

    The good news is that it will tell you _everything_ that's going on, so once you can set up the apropriate filters and interpret the results, all mysteries will be revelealed!

  10. #10
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    Re: Which task is producing network traffic

    Thanks Johngray.
    On looking at the TechNet article closer, it seems that it is worth deeper investigation. Thanks very much for ther tip.
    Thanks also to Joe for pointing it out.

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