On 2018-06-04, Stuart Longland <[email protected]> wrote: > My thinking, since the problem has disappeared, is that the sheer number > of clients was overwhelming the router, and as a result, it didn't have > enough buffer space to handle the number of separate hosts requesting > the time from it.
Oh! It might have been PF state table exhaustion. By default a maximum of 10000 states are allowed (can be overridden with a different value in pf.conf). Has it been rebooted since the last time you saw the problem? If not, pfctl -si might still have some clues in the counters.

