There aren't very many ways to combat DDOS. That's why it's so popular. Some ISP's partner with a company that offers a tunnel based scrubbing service where they DPI all your traffic before they send it to you. If you only have a few upstreams it may be helpful to you. I spoke to them last year but we have too many links and too many blocks to use it. I think the name of the company was prolexic. They're also a L3 VAR if you have L3 links. There isn't alot of BGP (AFAIK) magic that doesn't involve cutting someone off to save the rest of your customers. 2012/2/5 Ray Gasnick III <rgasnick@milestechnologies.com>
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>
Computer Networking – IT Support – Business Software – Website Design – Online Marketing & PR