DOS attack assistance?

Paul Rolland (=?UTF-8?B?44Od44O844Or44O744Ot44Op44Oz?=) rol at witbe.net
Wed Nov 26 05:14:18 CST 2008


Hello,

On Wed, 26 Nov 2008 05:37:59 -0500
Pete Templin <petelists at templin.org> wrote:

> One of my customers, a host at 64.8.105.15, is feeling a "bonus" 
> ~130kpps from 88.191.63.28.  I've null-routed the source, though our 
> Engine2 GE cards don't seem to be doing a proper job of that, 
> unfortunately.  The attack is a solid 300% more pps than our aggregate 
> traffic levels.
> 
> It's coming in via 6461, but they don't appear to have any ability to 
> backtrack it.  Their only offer is to blackhole the destination until 
> the attack subsides.  BGP tells me the source is in AS 12322, a RIPE AS 
> that has little if any information publicly visible.
> 

12322 is Free, a DSL (and now FTTH) provider in France. They also have
a dedicated server hosting service.

88.191.63.28 is one of these dedicated server that is hosted in one of their 
DC :
traceroute to 88.191.63.28 (88.191.63.28), 30 hops max, 60 byte packets
...
 7  10ge-1-50.bzn-swr5.dedibox.fr (88.191.2.37)  353.946 ms  334.180 ms  336.400 ms
 8  sd-11899.dedibox.fr (88.191.63.28)  338.403 ms  374.956 ms  376.837 ms

I thought these were supposed to be connected at 100MBps, but if you see
more than that, then it is possible that they are now connected thru a GBps
port.

You can try to contact the dedibox NOC, and Free :
noc at free.fr
can be a nice place to start...

Paul

> Any pointers on what to do next?
> 
> Thanks,
> 
> Pete
> 


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