TCP explicit congestion notification


I would like to know if the M370 supports TCP flags, especially TCP ECN. How are the flagged segments processed by the appliance when they pass-through towards the destination host?

Thank you,


  • mboscolomboscolo Moderator, WatchGuard Representative

    The properties is one which the Firewall is not aware of. However the TCP flag should be passed and not dropped. If you are encountering problems with packets dropping, I would recommend opening a Support case to further investigate the the traffic in the TCP headers.

    Mark Boscolo

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