many services don’t use port 80 ( but you see port 80 or 443 becource the trafic goes though traefik )
node-red for instance uses port 3000 ( and so does the api nodes in openflow )
( that is what the - traefik.http.services.http-service.loadbalancer.server.port=3000 label is telling traefik )
So if you want to “hit” the nodered nodes internally and not though traefik, you need to use the service name and port 3000