Re: Looking for an Akamai contact, strange DoS traffic sourcing from Akamai sources

["Patrick W. Gilmore" <patrick () ianai net>]

The issue has been reported to the proper people inside Akamai.  They are investigating, we are not ignoring the issue.

If any network with on-net Akamai servers has an issue, including this or any other, please e-mail NetSupport-tix () 
akamai com and that will open a ticket with our Network Support group.

-- 
TTFN,
patrick


On Jan 21, 2011, at 9:43 AM, Jack Bates wrote:
> On 1/21/2011 8:38 AM, Tom Beecher wrote:
> > Jack-
> >
> > This is exactly what we're seeing. The Akamai server starts a
> > retransmission flood aimed at a specific address randomly. We're seeing
> > thousands of retransmissions of the same packet over and over again,
> > same sequence/ack numbers, all 1460 bytes. In the last capture I have,
> > it was all JPEG data, although we weren't capturing entire packets.
> > There is a slight difference in the capture payloads, two bytes each time.
>
> The content between attacks changes at times, as do the source IPs, as they send different content. We've noticed at 
> least 2 different akamai hosted sites packets being sent.
>
> 1460 is definitely the number. What gets me is that the 3-way should be complete to allow the 1460, and the modem 
> bank is spamming host unreachable ICMP messages since that IP is offline.
>
> > I had another dial-up provider contact me off list, and he's seeing the
> > same thing. I'm wondering if this is actually more widespread, but only
> > dial-up providers are really seeing the effects since a 3-5Mbps burst is
> > most noticeable for us on our smaller upstream links. //
>
> This was my thought, though in my downstream's case, it's saturating his DS-3. The 45mb spikes were just enough for 
> me to barely make it out on the akamai gig-e graphs.
>
> He's also not always receiving from my local node. Sometimes his other transit links saturate due to remote nodes 
> doing the same thing.
>
>
> Jack