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Thread: TcpWindowSize is limited

  1. #1
    Junior Member
    Join Date
    May 2019

    TcpWindowSize is limited

    (Sorry for my bad English)

    My TcpWindowSize in registry is 496400.
    I downloaded a WireShark to make sure that all okey.
    And i noticed that my TcpWindowSize is 262144
    Help me, what`s wrong?
    Windows 10, WindowsScalingOption=256
    P.S And TcpAnalyzer say the same

  2. #2
    Administrator Philip's Avatar
    Join Date
    May 1999
    Jacksonville, Florida, United States
    Blog Entries
    Windows 10 uses an "auto tuning" algorithm to determine what size RWIN is needed at the moment depending on network conditions. You can control how aggressively this algorithm allocates the RWIN value, however, you can't control it directly, it does not follow the registry value. The relevant settings that are editable in Windows 10 are covered by the TCP Optimizer.
    Linux is user friendly, it's just picky about its friends...
    Disclaimer: Please use caution when opening messages, my grasp on reality may have shaken loose during transmission (going on rusty memory circuits).

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