> Just curious, was the "fairly legit search engine" semrush.com?
>
> I've seen a few sites get overwhelmed by them recently.


Yes indeed it was.


>> Well I certainly use it to defend from that kind of attack all the time.
>>  Can you give us some idea of the rate (ie: how many requests per
>> second)?   Also, for that kind of attack it's important to be using the
>> recidive filter.    By any chance is it a wordpress site?


So you're saying fail2ban should have caught it so they must have been
making requests at a rate lower than my configured maximum?  How does
fail2ban know to lump together stats for requests coming from
different IP addresses?

- Grant


>> > I recently suffered DoS from a series of 10 sequential IP addresses
>> > which identified themselves as being associated with a fairly legit
>> > search engine.  fail2ban would have dealt with the problem if a single
>> > IP address had been used.  Can it be made to work in a situation like
>> > this where a series of sequential IP addresses are in play?

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