Once in a while you may need to block certain third parties from accessing your websites. There are plenty of automatic bots which crawl the Internet, for instance, and produce fake visits and online traffic. In addition, there are spammers that leave links to questionable websites as comments to blog articles. This sort of things could significantly undermine your hard work, simply because nobody likes to visit an Internet site with tons of fake comments, not to mention that the increased traffic from both spammers and bots can create high load on the server where your Internet site is hosted, that can result in the site not working properly. One of the best solutions in such a case is to block the IP addresses that create the fake traffic, in order to make certain that the visits to your Internet site are legitimate.