I started this public NTP service on raspberry pi - 3 Aug 2016.
Before I have running public NTP service on Cisco boxes, since 2007
The raspberry, have been running very stable with high load.
I have seen 1 abuse of this service
It startede 11:45 - 22 Aug 2019.
The NTP service was hit with 7600 request/sec – from 1 ip address
* This ip address is now blocked in my firewall.
The traffic keep comming to the firewall - but not to the NTP server!