[ntp:questions] NTP Denial of Service attack 29 November 2011

Doug Calvert dfc-list at douglasfcalvert.net
Tue Nov 29 23:51:14 UTC 2011

On 11/29/2011 03:44 PM, Rich wrote:
> USNO is seeing an apparent coordinated denial of service attack on NTP
> originating with the following IPs:
>;;;   I
> recommend that you block,, and
> There will likely be more to follow. These appear to originate on
> APNIC (Asian Pacific).
> Currently we are seeing many tens of thousands of packets per second
> coming in.

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