Hi-- On Feb 16, 2014, at 11:58 AM, Nyamul Hassan <[email protected]> wrote: > Good point, Clay Fiske. Is there a realistic estimate to how many packets > / sec a legitimate remote is allowed?
Sure. ~10 per minute is the highest rate a normal client using iburst will startup as; after that one packet per minute (every 64 seconds, actually) is the most rapid polling rate that should be used without prior coordination. 10 packets per minute also accomodates ntpdate. > Suppose, if we can agree on numbers like: > Less than 100 packets each min > + Less than 300 packets in 10 mins > + Less than 500 packets in 1 hour That's overgenerous: 500 packets per hour is 1 every 7.2 seconds. If something has a clock which is so defective that it can't keep time well enough that it needs to keep asking more than once a minute, well, it should be talking to something on the LAN instead of wasting public resources. Regards, -- -Chuck _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
