DDoS Attacks Cause of Game Servers

Jeroen Massar jeroen at massar.ch
Thu Jan 31 07:36:51 UTC 2013


On 2013-01-31 08:04 , Shahab Vahabzadeh wrote:
> Hi everybody,
> Last two days I was under an interesting attack which comes from multiple
> sources to three of my ADSL users destination.

You say that it comes from multiple sources to 3 of your DSL users.

The below source/dest though shows that the destination is from CERN in
Switzerland, you know the people who build black holes ;)

The IP does not ping at the moment, but the whois indicates 'dyn' in the
netname thus that is not too unsurprising.

> The attack make router to ran out of CPU and we had to reload it to solve.
> I ask those three users and they said we are only game players and all of
> them were kids, I think they told the true, they told we are playing:
> http://intl.garena.com/

Looks not like a game, just another messenger / IM client.

> Attacks takes only 20 or 30 minutes and it happens only 4 times in two days.
> I could'nt capture any packet but this is out put of my "show ip
> accounting" that time:

You'll be needing a bit more info than that... and 117 packets with a
total of 5148 bytes is not a lot of traffic to put anything down (unless
it is a targeted attack)

You might though contact the CERN NOC, if you really think something is
funny there. Timestamps might be very useful to provide though,
especially if the IP is really dynamic.

Greets,
 Jeroen




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