Hi. We had a customer that was attacked by the same "game server feature". We received aprox 10 Gbit of traffic against the customer. The attacker sends spoofed packets to the game server with the target IP as "source", the gameserver sends replies back via UDP to the target host. The attacker sends a couple of hundred packets per second and thus generating a 10 Mbit UDP flood. There is fixes/workarounds for the game servers, just a matter of the admin taking care of it. See: http://rankgamehosting.ru/index.php?showtopic=1320 The "attacking" IPs aren't spoofed, so just compile a list and send e-mails to each provider. We had 1000+ IPs gathered and sent 100+ abuse e-mails, only received reply from less than 20%. Sad that people care so little about mitigating DDoS/UDP/ICMP floods. On Sun, 5 Feb 2012 18:36:13 -0500, Ray Gasnick III <rgasnick@milestechnologies.com> wrote:
We just saw a huge flux of traffic occur this morning that spiked one of our upstream ISPs gear and killed the layer 2 link on another becuase of a DDoS attack on UDP port 80.
Wireshark shows this appears to be from a compromised game server (call of duty) with source IPs in a variety of different prefixes.
Only solution thus far was to dump the victim IP address in our block into the BGP Black hole community with one of our 2 providers and completely stop advertising to the other.
Anybody see this recently and have any tips on mitigation, reply on or off list.
Thank You,
Ray Gasnick III CISSP, Technology Specialist: Network Security & Infrastructure Miles Technologies www.milestechnologies.com<http://www.milestechnologies.com/>
Phone: (856) 439-0999 x127 Direct: (856) 793-3821 How am I doing? Email my manager at itmanager@milestechnologies.com<mailto:itmanager@milestechnologies.com>
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