though I have found many topics with "server reached MaxClients setting, consider raising the MaxClients setting", still I`m looking for clear picture about it. Last night we had offline server for 10 mins. and here is the part of error_log which correspond to this attack:
I don`t wanna increase MaxClients setting value, I don`t know exactly how to prevent this attack in future since I can figure out which request overload server?
This is cPanel licensed server and if you know some documented procedure how to prevent those kind of attack in the future, or how to trace requests which causing overload please post it here.
You need to look at the apache status in WHM, see what the connections are doing and where they originate from (which IP addresses). If it's an attack coming from a specific IP then you can block it. Post the output from your apache status once it has many open connections.
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