Do you provide against a potential DoS set-up?

[Eorhim]

With UDP reflection you can easily set-up a network DoS by running the service on two or more hosts and spoof a UDP package with the origin of the other reflector. They will play ping-pong with each other indefinitely.

See https://en.wikipedia.org/wiki/Echo_Protocol and https://en.wikipedia.org/wiki/Denial-of-service_attack

Possible mitigation: store the received packages in a LRU cache and only respond once on once per time-frame.