Mailinglist Archive: opensuse (929 mails)

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Re: [opensuse] DDoS Attacks on gaming servers using NTP
  • From: Per Jessen <per@xxxxxxxxxxxx>
  • Date: Fri, 07 Mar 2014 17:43:29 +0100
  • Message-id: <lfcsvt$7f9$>
Andrey Borzenkov wrote:

В Fri, 07 Mar 2014 10:09:32 -0300
Cristian Rodríguez <crrodriguez@xxxxxxxxxxxx> пишет:

El 07/03/14 10:01, Paul Neuwirth escribió:
analyzing my network traffic i saw lot's of high volume connections
from my ntpd to game servers..
googling arround
( i read about
DDoS attacks using ntp. How to avoid my ntpd being used for that?
installed ntp-4.2.6p5-9.3.1.x86_64
Thanks for help

You need to apply the relevant security updates.

There are no patches. You need to manually harden ntp.conf. It is
impossible to implement via patch.

And if you're not running a public NTP service, blocking port 123 in the
firewall ought to be sufficient.

Per Jessen, Zürich (10.8°C) - your free DNS host, made in Switzerland.

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