[nsp-sec] DDoS to EveryDNS nameserver IPs

[David Ulevitch]

The attack has leveled off quite a bit.  Each site was getting around  
250mbps of this stuff and now each site is around 10-50mbps which is  
more than manageable.

Thanks to all who helped!

-David

On Feb 4, 2009, at 1:39 PM, David Ulevitch wrote:

> ----------- nsp-security Confidential --------
>
> I'm currently receiving a large DDoS to all my EveryDNS nameserver  
> IPs:
>
> ns1.everydns.net has address 208.76.56.56
> ns2.everydns.net has address 78.129.207.168
> ns3.everydns.net has address 71.6.202.220
> ns4.everydns.net has address 208.96.6.134
>
> The DDoS appears to all be UDP packets of length 1000 bytes.
>
> Here's what I mean:
>
> 01:39:20.107917 IP 115.186.96.138.58798 > 208.76.56.56.2194: UDP,  
> length 1000
> 01:39:20.107959 IP 82.212.143.159.2270 > 208.76.56.56.4000: UDP,  
> length 1000
> 01:39:20.107969 IP 187.10.195.160.60001 > 208.76.56.56.2105: UDP,  
> length 1000
> 01:39:20.107986 IP 189.119.47.137.25664 > 208.76.56.56.908: UDP,  
> length 1000
> 01:39:20.107991 IP 213.189.175.47.3732 > 208.76.56.56.3804: UDP,  
> length 1000
> 01:39:20.108012 IP 202.41.85.244.22349 > 208.76.56.56.3119: UDP,  
> length 1000
> 01:39:20.108089 IP 89.174.93.234.4675 > 208.76.56.56.3589: UDP,  
> length 1000
>
> Anyone know what this looks like or anything I can do to stop it...
>
> 3 of the 4 nameservers are offline right now, and I'm working with  
> some folks to bring up some more machines now.  Ironically, I'm at  
> the ICANN DNS meeting at GATech right now with a bunch of you. :-)
>
> Thanks,
> David Ulevitch
> 415 971 6916
>
>
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