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I was just trying to post something to a website via my localhost to retrieve some data, and suddenly, this idea came to my mind: What happens if I create a post, put it into a for loop that runs over 1 million times, and send requests to a specific url for a million time? I just did not want to try to avoid any harm, but I wonder. And if this could cause some harm, how can I avoid such an attack?
this kind of things actually happen a lot. some are intentional and some are not. take for example: http://en.wikipedia.org/wiki/Slashdot_effect
other times, this is intentional, and its called a DoS (Denial Of Service). a lot of websites are taken down with these attacks, and not always involve an actual connection. it may suffice to saturate the listen backlog of the underlying os.
how to avoid it.. you cant, basically. you can make the best effort at it, but you will never be able to actually avoid it. after all, your website is there to be accessed, right?