gRPC service behind an ingressroute

Traefik Traefik v2 (latest)
1

Hi I use embeded Traefik into K3s.

I have a grpc service as a K3s deployment / service
To publish it, I created an ingressroute:

apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: ingressroute
spec:
  entryPoints:
    - web
  routes:
  - match: Host(`hostname`) 
    kind: Rule
    services:
    - name: mysvc
      port: 3051

Service:

apiVersion: v1
kind: Service
metadata:
  name: service
  labels:
    {{- include "mychart_chart.labels" . | nindent 4 }}
spec:
  type: {{ .Values.service.type }}
  ports:
    - port: {{ .Values.service.httpport }}
      targetPort: http
      protocol: TCP
      name: http
    - port: {{ .Values.service.grpcport }}
      targetPort: grpc
      protocol: TCP
      name: grpc
    - port: {{ .Values.service.ftpport }}
      targetPort: ftp
      protocol: TCP
      name: ftp
    - port: {{ .Values.service.metricport }}
      targetPort: metrics
      protocol: TCP
      name: metrics
  selector:
    {{- include "mychart_chart.selectorLabels" . | nindent 4 }}

My grpc service doesn't support tls yet, so I don't need a certificate yet.

In local, I get no issue, i can access to my grpc api.
From my hostname, I get some issue with refused connection.
grpcurl -plaintext hostname:80 MyRepo/Service gives Failed to dial target "hostname" dial tcp: lookup hostname on [::1]:53 read udp [::1]:38613->[::1]:53 read: connection refused
I miss something with Traefik configuration ?