Am 01.09.2015 um 11:26 schrieb Miroslav Lichvar:
chronyd doesn't implement server rate limiting (yet). It's not a high priority. It may sound like a useful feature, but it often actually increases the network traffic, because clients that send too many requests are often the ones that will quickly send another request when there is no reply from the server or it's told to reduce its polling rate.
it's a matter of security in case of amplification attacks to third parties since NTP is UDP like DNS and so *not* low priority