Reverse proxy minecraft server

Traefik Traefik v2
1

Hi, I just want to reverse proxy my minecraft server so that when I connect to my external IP on port 25565, traefik forwards my packets to an internal ip address at port 25565

2

Do you need TLS on the port? Will the Minecraft server create a certificate?

3

From my research, Minecraft uses a version of TCP that doesn't support TLS. So no.

4

Any ideas on how to achieve this?

5

Create a Traefik container listening on your port, create a dynamic config file to proxy/forward any incoming connection on that entrypoint to a target service.

minecraft Docker service is a fake inside Docker network. But you can just adjust the target IP:port in the dynamic config file, even to outside Docker network.

docker-compose.yml:

services:
  traefik:
    image: traefik:v3
    volumes:
      - ./traefik-dynamic.yml:/traefik-dynamic.yml
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - traefik-certificates:/certificates
    ports:
      - 80:80
      - 443:443
      - 25565:25565
    networks:
      - proxy
    command:
      - --providers.docker=true
      - --providers.docker.exposedByDefault=false
      - --providers.docker.network=proxy
      - --providers.file.filename=/traefik-dynamic.yml
      - --providers.file.watch=true
      - --entryPoints.web.address=:80
      - --entryPoints.web.http.redirections.entryPoint.to=websecure
      - --entryPoints.web.http.redirections.entryPoint.scheme=https
      - --entryPoints.websecure.address=:443
      - --entryPoints.websecure.http.tls.certResolver=myresolver
      - --entryPoints.minecraft.address=:25565
      - --api.debug=true
      - --api.dashboard=true
      - --log.level=INFO
      - --accesslog=true
      - --certificatesResolvers.myresolver.acme.email=mail@example.com
      - --certificatesResolvers.myresolver.acme.storage=/certificates/acme.json
      - --certificatesresolvers.myresolver.acme.tlschallenge=true
    labels:
      - traefik.enable=true
      - traefik.http.routers.api.entrypoints=websecure
      - traefik.http.routers.api.rule=Host(`traefik.example.com`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`))
      - traefik.http.routers.api.service=api@internal
      - traefik.http.routers.api.middlewares=auth
      - 'traefik.http.middlewares.auth.basicauth.users=test:$$apr1$$H6uskkkW$$IgXLP6ewTrSuBkTrqE8wj/'

  whoami:
    image: traefik/whoami:v1.10
    networks:
      - proxy
    labels:
      - traefik.enable=true
      - traefik.http.routers.whoami.entrypoints=websecure
      - traefik.http.routers.whoami.rule=Host(`whoami.example.com`)
      - traefik.http.services.whoami.loadbalancer.server.port=80

  minecraft:
    image: traefik/whoami:v1.10
    networks:
      - proxy

volumes:
  traefik-certificates:

networks:
  proxy:
    name: proxy
    attachable: true

traefik-dynamic.yml:

tcp:
  routers:
    forward:
      entrypoints:
        - minecraft
      rule: HostSNI(`*`)
      service: forward

  services:
    forward:
      loadBalancer:
        servers:
          - address: minecraft:80