Filter NTP traffic by packet size?

Peter Phaal peter.phaal at gmail.com
Sun Feb 23 03:22:57 UTC 2014


Brocade demonstrated how peering exchanges can selectively filter
large NTP reflection flows using the sFlow monitoring and hybrid port
OpenFlow capabilities of their MLXe switches at last week's Network
Field Day event.

http://blog.sflow.com/2014/02/nfd7-real-time-sdn-and-nfv-analytics_1986.html

On Sat, Feb 22, 2014 at 4:43 PM, Chris Laffin <claffin at peer1.com> wrote:
> Has anyone talked about policing ntp everywhere. Normal traffic levels are extremely low but the ddos traffic is very high. It would be really cool if peering exchanges could police ntp on their connected members.
>
>> On Feb 22, 2014, at 8:05, "Paul Ferguson" <fergdawgster at mykolab.com> wrote:
>>
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>>> On 2/22/2014 7:06 AM, Nick Hilliard wrote:
>>>
>>>> On 22/02/2014 09:07, Cb B wrote:
>>>> Summary IETF response:  The problem i described is already solved
>>>> by bcp38, nothing to see here, carry on with UDP
>>>
>>> udp is here to stay.  Denying this is no more useful than trying to
>>> push the tide back with a teaspoon.
>>
>> Yes, udp is here to stay, and I quote Randy Bush on this, "I encourage
>> my competitors to block udp."  :-p
>>
>> - - ferg
>>
>>
>> - --
>> Paul Ferguson
>> VP Threat Intelligence, IID
>> PGP Public Key ID: 0x54DC85B2
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>



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