[RndTbl] NTP DDOS Attacks

[Gilles Detillieux]

Thanks, Sean and Bill, for the helpful links.  The cloudflare.com 
article offers a link to SANS's ISC site with a very simple tip: just 
add "disable monitor" to your /etc/ntp.conf file.  This works even with 
ntp-4.2.2p1 on RHEL 5, and is way easier than figuring if/how I can 
update to 4.2.7, or if Team Cymru's highly locked-down config for simple 
NTP clients will work OK for a 3 peer stratum 2 config like what I'm using.

Gilles

On 13/02/2014 11:29 PM, Sean Walberg wrote:
> Some more technical details: 
> http://blog.cloudflare.com/technical-details-behind-a-400gbps-ntp-amplification-ddos-attack 
>
>
> There's a comment at the bottom to the effect of "there's an even 
> worse problem hiding in SNMP"
>
> Sean
>
>
> On Wed, Feb 12, 2014 at 5:57 PM, Bill Reid <billreid at shaw.ca 
> <mailto:billreid at shaw.ca>> wrote:
>
>     Here is an article on the attack.
>
>     http://www.informationweek.com/security/attacks-and-breaches/ddos-attack-hits-400-gbit-s-breaks-record/d/d-id/1113787
>
>     On 12/02/14 08:17, John Lange wrote:
>
>         Does anyone know of a public site which documents the traffic
>         associated with
>         the recent NTP DDOS attacks?
>
>         I'm trying to see if the attacks correlate to some packet loss
>         we are seeing.
>
>         --
>         John Lange
>
>
>
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> -- 
> Sean Walberg <sean at ertw.com <mailto:sean at ertw.com>> http://ertw.com/
>
>
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-- 
Gilles R. Detillieux              E-mail: <grdetil at scrc.umanitoba.ca>
Spinal Cord Research Centre       WWW:    http://www.scrc.umanitoba.ca/
Dept. Physiology, U. of Manitoba  Winnipeg, MB  R3E 0J9  (Canada)

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