On Tue, Oct 19, 2010 at 9:34 PM, Maxim Veksler <[email protected]> wrote:
> Follow up question: > > ICMP can be used for DoS. Cool. > > How does google battle with that? All google services are ping'able (which > is very cool obviously). > > DoSing 10k's (100k's ?) on a worldwide geographically distributed cloud of servers is a bit more difficult than one (10. 100. typical hosting facility..), for starters. I assume they also do rate limiting on how much you can ping them, and just discard attacks when it goes above a certain threhold. I know I do :) > How do they protect against the attack?, surly there are enough script > kiddies that constantly try to DoS Google. > > See above. They also have a similar limit on the HTTP level; If you query google too much from a single IP, you'll be blocked and they'll refuse to solve queries for you, before you solve their CAPTCHA. -- Shimi
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