I have configured my iptables for only allowing 19132/udp. So there should be no TCP traffic on that port. I'm running my Bedrock server without Traefik for a while now without any problems using the below configuration:
services:
bedrock:
image: itzg/minecraft-bedrock-server
container_name: bedrock
restart: always
logging:
options:
max-size: "8m"
max-file: "10"
stdin_open: true
tty: true
ports:
- 19132:19132/udp
environment:
- EULA=true
- VERSION=1.16
- SERVER_NAME=Bedrock Server
volumes:
- /etc/timezone:/etc/timezone:ro
- bedrock:/data
labels:
- "traefik.enable=false"
volumes:
bedrock: {}
As of right now, I'm actually playing with this configuration.