A flood attack sends thousands of requests from hundreds of addresses at once: blocking them one by one is not enough. HT Guard then puts the site in "check mode": real visitors get through in a second, bots stay out.
Animation: an attack, HT Guard's reaction, then a real visitor.
The check gets in the way of neither your search ranking, nor your work, nor your sales.
HT Guard is included with every Hi-Tech Hosting web hosting plan.