Putting some spin on those propeller hats: http://www.ibiblio.org/harris/500milemail.html http://www.ibiblio.org/harris/500milemail.html TL;DR Measure the late

Putting some spin on those propeller hats: http://www.ibiblio.org/harris/500milemail.html http://www.ibiblio.org/harris/500milemail.html TL;DR Measure the latency to the client, reject if too high. Of course, this also prevents connections from people who have high latency internet connectivity, such as most radio toys.