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    ICMP Flood

    This is a discussion on ICMP Flood within the Sky Router forums, part of the Sky Broadband help category; Hello, i have just been icmp flooded i have contacted the isp's of the ips via phone,etc and they refuse ...

    1. #1
      TomM's Avatar
      TomM is offline Sky User Member
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      ICMP Flood

      i have just been icmp flooded i have contacted the isp's of the ips via phone,etc and they refuse to take any action.
      my only option is to block icmp through my router could anyone please tell me how to do this?

      Tom Mcloughlin.

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    3. #2
      Scubbie's Avatar
      Scubbie is offline Sky User Moderator
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      Re: ICMP Flood

      This is a form of a DDoS attack. Check to see if your router has been set to respond to 'Pings'. If so, disable that option.

      Take a look at your own set up too. Make sure that you haven't inadvertently picked up some nasty by scanning any device attached to your network. Check with on-line AV scanners & also download & install any anti-Malware software (MalwareByte's Anti-Malware is very good). Also check out with Advanced SystemCare.

      Once you are happy that everything is clean, reset your router to see if you can change your IP address. If it doesn't change, switch it off tonight and power it on in the morning, this should provide you with a new address.

      Also ensure that any torrent software you are using has been maintained correctly. A lot of public torrents are plagued with silly people who want to attack people in this manner.

      PlusNet Fibre since Jan 2021
      Previously Sky Fibre & Sky BB since 2010.

    4. #3
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      Re: ICMP Flood

      Did you action any of the suggestions in your last post?

      It always helps to know what you have tried.


      Please note the views and recommendations in my posts are my own and in no way reflect the views of SkyUser.

      Useful Utilites TCPOptimiser /Test Socket

      Note - When downloading always select the Custom install or you will end up with stuff you don't want.

    5. #4
      WheelNutWalter's Avatar
      WheelNutWalter is offline Sky User Member
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      Re: ICMP Flood

      A firewall isn't going to help you. The ICMP packets are still going to quench your line, whether your router responds to them or not.

      Disabling ICMP does not improve security, and I would strongly suggest that you don't do this. ICMP isn't just used for echo (or ping) requests, it is used to negotiate many settings used by TCP and UDP traffic (e.g. MTU).

      If you can specifically block ICMP echo request/reply, then it won't hurt, but again, it isn't going to help you, and just prevents you (or your ISP) from performing diagnostics on your connection.

      If you have a dynamic IP address from your ISP, then the best course of action is to reboot your router, as it is likely that you will get assigned a new IP address that is no longer being targeted.

      If you are on a static IP, contact your own ISP, as they will be able to put measures in place to stop the ICMP flood from saturating your line.

      Hope that helps.



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