We have created Live blacklist of IP addresses based on statistics from our big websites which we operate. To our sites each day come tens of thousands of visitors many of them identifiable but also come various non-identifiable crawlers, spam bots. Our unique protection system allow easy identification of the real visitors ip with any bots/crawlers ip addresses and other threats include unknown spam bots. The operating principle of our protection system is simple: We allow any user to browse 10 pages on any of our websites, and after system start to display free registration form on the website and to block all pages on website. Crawlers/bots ignore such instructions. If user agent line has no any identification of that bot and is masking itself as a normal user we will automatically add this IP address to our blacklist (i.e. our Blacklist has no search crawlers like Google Bot IP addresses, Yahoo Bot, Bing Bot, Baidu, etc) More info - http://myip.ms/info/about .