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psvgc's avatar
psvgc
Aspirant
Dec 17, 2016

Dos Attacks

i am noticing a wole slew of dos attacks in my cable modem router log

its ping of death, tear drop, illegal fragments.. the wifi is being very slow

 

my isp is spectrum(time warner cable),

 

should i  check or uncheck the box for  "disable port scan and dos prictection option"

 

please help

Troubleshooting

3 Replies

  • TheEther's avatar
    TheEther
    Guru
    Dec 17, 2016

    The default setting is unchecked, meaning that it Port Scan and DoS protection is enabled.  There are a small number of people here, myself included, who believe that there are flaws in Netgear's code and that it misidentifies some packets as an attack.  Turning off this feature could help in some of those cases.  Unfortunately, most people fear that turning it off would somehow leave your home network wide open to the Internet.  This is not true.

     

    You should determine whether the slow Wi-Fi and DoS attacks are related.  They may not be necessarily so.  Slow Wi-Fi could be caused by interference or congestion from other networks.  The simplest thing to do is to experiment with changing Wi-Fi channels.  A Wi-Fi analyzer program can greatly help with finding a good channel.

     

    If you have a wired machine, then you should see if it too has slow Internet.  That would lend more credence to the DoS attack being real.

    • psvgc's avatar
      psvgc
      Aspirant
      Dec 18, 2016

      TheEther thanks for quick response.

      1. when i wired computer to the modem the speed was wayyyy fast

       

      i installed netgear wifi analytics app and tried to see the signal.. the dignal strength stays 4% and teeters between -50dbms and -60dbms.. i am in the same room as the modem router and chose the best channel it suggested

       

      what do i need to do to make this better

       

      • TheEther's avatar
        TheEther
        Guru
        Dec 18, 2016

        Is the wired computer slow going through the router?

         

        -50 dBm to -60 dBm is a decently good signal strength, but that's at odds with a reading of 4%.  It's possible that there are other sources of radio noise that could be interfering with Wi-Fi.  Baby monitors, 2.4 GHz cordless telephones, Bluetooth and microwave ovens for example.  Can you switch to 5 GHz?