Hello,
I got the following message from my host. In my knowledge, I dont use any apps that need turn. For the moment I have blocked udp port 3478 via ufw. Any ideas how could that happen?
Platform version v7.5.2 (Ubuntu 20.04.3 LTS)
it seems that your server was used for a reflection attack via STUN/TURN.
PORT STATE SERVICE
3478/udp open stun
https://github.com/coturn/coturn/pull/1588
Please check measures such as ACL and/or rate-limits or software which has already implemented measures to prevent abuse here.