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Thread: web client SYN packet intermittently ignored.

  1. #1
    Join Date
    Sep 2021
    Beans
    1

    Question web client SYN packet intermittently ignored.

    Hi, I am running 21.04 (have nothing to compare to previous vers) and am trying launch a web server. I find when I connect to the server it will intermittently not respond to the client SYN packet. This can be seen on the Tshark trace. I have searched various forums which suggest that parameters in /etc/sysctl may need tweaking. All attempts to fix have failed.
    Would anyone have any ideas on areas to address to effect a fix ??

    Many thanks

    Kev

  2. #2
    Join Date
    Nov 2007
    Location
    London, England
    Beans
    7,333
    Distro
    Xubuntu 20.04 Focal Fossa

    Re: web client SYN packet intermittently ignored.

    This is very interesting, and may help: https://veithen.io/2014/01/01/how-tc...-in-linux.html
    I suspect your server is slow getting through its workload. Increasing the backlog should help if the overload is only temporary.

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