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  1. #1

    TL_ER5120_V2 - Error in log - <date/time> <4> Detected large ping attack dropped x packets

    Model : TL_ER5120

    Hardware Version : 2

    Firmware Version :

    ISP : [/COLOR] Cogeco (Ontario Canada)

    Hi Everyone,

    I am new to this forum, however, I am seeking some guidance/help to identify and resolve a recent message showing up in our router log. I have started to see a series of error messages, all very similar however I don't really know where to begin to investigate.

    Error Message looks like this:
    <date / time> <4> : Detected large ping attack, dropped X packets

    Generally, these come in bursts throughout the day. I am not sure if these are from internal or external.

    This is a small business with a flat network and less than 25 devices connected via the LAN and/or WIFI. There are a few PC's & MAC's, a couple of printers, 6 WIFI access points and a few other Apple TV devices which connect via wireless. We have 1 network switch, 1 router, then the connection to the ISP. There have been no new devices added recently, all PC's have up-to-date MS patches.

    If they are coming from outside I assume I would need to contact our ISP for support. However, if they are coming from internal where do I begin to look.

    Thank you for your help
    Last edited by akeyes; 06-20-2017 at 21:35.

  2. #2
    Hi dude, I think it should from the outside. You can check if you enable the Block Large PING from WAN option in the firewall.


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