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Windows 2k3 UDP flood, help please

Discussion in 'Networking' started by deviss, Dec 9, 2011.

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  1. deviss

    deviss Thread Starter

    Joined:
    Dec 9, 2011
    Messages:
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    Hello

    I have a small server hosted on windows 2003 standard ed sp1 and since few days ago someone is flooding us through udp ports.

    I have followed these guides

    http://blog.larmib.com/2011/stop-outbound-udp-floods-on-your-windows-server-2003-or-2008/

    and

    http://www.serverintellect.com/support/windowsserversecurity/ipsec-blockip.aspx

    but the upd flood still goes on.

    I'm using outpostfirewall to see the packets and the ip that are flooding. svchost.exe is shown as flooded through UDP 123 port


    Could anyone help me to sort this out?


    Thank you
     
  2. 213374U

    213374U

    Joined:
    Dec 10, 2011
    Messages:
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    Do you currently have your server configured to match time with the network via NTP? If not, turn the service off and simply shut down UDP/123 at your firewall.
     
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