As the price of cloud computing continues to tumble we can do what was previously unthinkable. It wasn’t long ago that getting WordPress to scale to 10 million hits a day for $15 a month was front page hacker news material; but we can do even better.
Back in the good old days of client-server architectures you had one person sitting in front of a browser connecting directly to your server. So if you ever wanted to know who that person is all you needed to do was to take a look at the
REMOTE_ADDR of your requests.