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Forum Moderators: goodroi
#1 - Create an empty subdirectory
#2 - Block this subdirectory with your robots.txt
#3 - Place a 1 pixel link in that directory (humans wont see it, only bots will follow it)
#4 - Track all ip addresses that hit that link and then block those ips from accessing your site
This system will identify the bots (more specifically their ip addresses) and will hopefully avoid accidentally blocking the ip addresses of human visitors.