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    DoS attacks

    This is a discussion on DoS attacks within the Sky Broadband help forums, part of the Sky Broadband help and support category; My router is reporting a large number of DoS attacks over the last few days. The source seems to be ...

    1. #1
      Isitme's Avatar
      Isitme is offline Sky User Moderator
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      DoS attacks

      My router is reporting a large number of DoS attacks over the last few days. The source seems to be mainly Alexandria, (the Egypt one, not Glasgow) although a few are coming from Pasedena, USA. Any body else experiencing this?

      TomD


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


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






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    3. #2
      richone54's Avatar
      richone54 is offline Sky User Member
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      Re: DoS attacks

      is the info in the log section on router ?

      i have had a look and there are lots of something there but do not know what they are ?

    4. #3
      Undecided Adrian's Avatar
      Undecided Adrian is offline Sky User Member
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      Re: DoS attacks

      Occasionally I get this but due to having to reset the router more often on my replacement than the old router my IP address is refreshed lots more.

      I am no internet security expert but things to check is:

      On the router configuration page make sure that the Disable Port Scan and DOS Protection and Respond to Ping on Internet WAN Port are both UNCHECKED.

      The way it's worded it's a bit back to front, to be protected they have to be off.

      Of course with zombie bot computer nets these days you could have just hit on an IP address that they are DOS'ing and so just rebooting the router and making sure you have a new IP address can be quite effective as they won't know what's you new IP address.

      The problem is getting worse and worse it is now estimated that 1 in 4 PC's worldwide are now zombied, which is 250 million PC's and given that 1 billion PC's are expected to be sold in the next 3 years it's getting pretty scary how many PC's could be enslaved by 2010.

    5. #4
      Isitme's Avatar
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      Re: DoS attacks

      In the Log section, make sure that the boxes for DoS attacks is ticked. In the Email section turn on Notification, put in your email address etc, tick the boxes and choose how often you want to be notified. You will then be notified if and when an attack occurs.

      TomD


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


      Useful Utilites

      http://www.nirsoft.net/utils/wifi_information_view.html/ TCPOptimiser /Test Socket

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





    6. #5
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      Re: DoS attacks

      thanks Isitme,

      i know this is a stupid question (but you only learn by asking)
      ticked boxes in log and on email notification, put in my hotmail email address but had a box come up saying "an incorrect IP address format or domain name format"
      under email address is box for outgoing mail server, but i have not set email on my comp and do not know what to put ?

      any help much apprciated

    7. #6
      Isitme's Avatar
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      Re: DoS attacks

      Sorry, I can't help you there, it is looking for an outgoing server, if you don't put one it will not be able to send. I don't know if it will work, but you could try putting smtp.sky.com which is the Sky server address.

      TomD


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


      Useful Utilites

      http://www.nirsoft.net/utils/wifi_information_view.html/ TCPOptimiser /Test Socket

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





    8. #7
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      Re: DoS attacks

      will give it a go, thanks for the help

    9. #8
      richone54's Avatar
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      Re: DoS attacks

      Hi Isitme

      worked a treat, just had the first email

      will keep an eye and post back here about DOS attacks as and when


      thanks

    10. #9
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      Re: DoS attacks

      Just a heads up for you.
      We had a similar problem a while back.
      Turns out it was only happening if we were using a file sharing program.
      The router can only handle so many connections.
      ie : You run uTorrent to download the latest I'm a Celebrity, Get Me Out Of Here, because your Sky+ failed to record it.
      uTorrent connects to 99 seeders and 78 leechers.
      That's 177 connections.
      Yes you're getting a great speed, but not all the information is getting through. The router thinks that there are too many connections and blocks some of them, claiming they are DoS attacks. (Check the port number in the logs. It should be the same as the port you have forwarded for you application.)
      If you are getting these "attacks" only when running a file sharing app, try limiting the Maximum number of "connections" in the program, and turn off DHT also.
      A limit of about 100 should do the trick.
      Remember to re-boot your router after changing the settings in you file sharing app, to see if that has solved your problem.
      Hope this has been of some help.

    11. #10
      Isitme's Avatar
      Isitme is offline Sky User Moderator
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      Re: DoS attacks

      No, I don't use file sharing of any kind, I traced these back to the sources above through the source IP address.

      TomD


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


      Useful Utilites

      http://www.nirsoft.net/utils/wifi_information_view.html/ TCPOptimiser /Test Socket

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





     

     
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