Per second? I have a hard time believing that. What makes you so sure it's the same guy? I see no evidence of that so far. Post times, error messages, etc. Hell, maybe even several lines straight from your error log. I can help you get this crap stopped if it's truly an attack but really if it's a brute fore hack attempt, they're easy to stop. Is any of your content really THAT important?
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Dot Matrix TGP System
GiggleBerries.com TGP
Russian TGP Submitter