Welcome!
What did you do?
Define a docker container that exposed a port range with traefik configuration in docker-compose alongside Traefik.
Ran docker compose up.
Expected Traefik to route requests to ws subdomain port 8000
What did you see instead?
time="2026-05-11T11:16:07Z" level=warning msg="Failed to inspect container 58667437d0991c8b207a6a4d9190268a26ac505011af55f5fb0be96e82956d8c, error: invalid port '12000-13000': invalid syntax" providerName=docker
What version of Traefik are you using?
2.11.45
What is your environment & configuration?
ws:
container_name: ws
pull_policy: always
restart: always
depends_on: [ traefik ]
image: registry.internal.com/ws/ws:latest
....
labels:
- "traefik.enable=true"
- "traefik.http.routers.ws.rule=Host(`fixbridge.${SERVER}.platform.flextrade.cloud`)"
- "traefik.http.routers.ws.entrypoints=web"
- "traefik.http.routers.ws.service=ws"
- "traefik.http.services.ws.loadbalancer.server.port=8080"
- "traefik.frontend.entryPoints=http,https"
expose:
- "12000-13000"
traefik:
container_name: traefik
pull_policy: always
restart: always
image: "traefik:v2.11"
ports: [ "80:80" ]
command:
- "--api.insecure=true"
- "--providers.docker=true"
- "--providers.docker.exposedbydefault=false"
- "--entrypoints.web.address=:80"
- "--accesslog=true"
- "--log.level=DEBUG"
volumes: [ "$XDG_RUNTIME_DIR/docker.sock:/var/run/docker.sock:ro" ]
Other Notes
It works correctly when removing the expose config
Welcome!
What did you do?
Define a docker container that exposed a port range with traefik configuration in docker-compose alongside Traefik.
Ran docker compose up.
Expected Traefik to route requests to
wssubdomain port 8000What did you see instead?
What version of Traefik are you using?
2.11.45
What is your environment & configuration?
Other Notes
It works correctly when removing the expose config