title: Kubernetes ingress service NodePort is only listen to tcp6/ipv6 not tcp/ipv4
body: <p>I have setup ingress-nginx using helm through <code>helm install --name x2f1 stable/nginx-ingress --namespace ingress-nginx</code> and service:</p>
  
  <pre><code>apiVersion: v1
  kind: Service
  metadata:
    name: x2f1-ingress-nginx-svc
    namespace: ingress-nginx
    labels:
      app.kubernetes.io/name: ingress-nginx
      app.kubernetes.io/part-of: ingress-nginx
  spec:
    type: NodePort
    ports:
      - name: http
        port: 80
        targetPort: 80
        protocol: TCP
        nodePort: 30080
      - name: https
        port: 443
        targetPort: 443
        protocol: TCP
        nodePort: 30443
    selector:
      app.kubernetes.io/name: ingress-nginx
      app.kubernetes.io/part-of: ingress-nginx
  
  ---
  </code></pre>
  
  <p>running svc and po's:</p>
  
  <pre><code>[ottuser@ottorc01 ~]$ kubectl get svc,po -n ingress-nginx
  NAME                                         TYPE           CLUSTER-IP        EXTERNAL-IP   PORT(S)                      AGE
  service/x2f1-ingress-nginx-svc               NodePort       192.168.34.116    &lt;none&gt;        80:30080/TCP,443:30443/TCP   2d18h
  service/x2f1-nginx-ingress-controller        LoadBalancer   192.168.188.188   &lt;pending&gt;     80:32427/TCP,443:31726/TCP   2d18h
  service/x2f1-nginx-ingress-default-backend   ClusterIP      192.168.156.175   &lt;none&gt;        80/TCP                       2d18h
  
  NAME                                                      READY   STATUS    RESTARTS   AGE
  pod/x2f1-nginx-ingress-controller-cd5fbd447-c4fqm         1/1     Running   0          2d18h
  pod/x2f1-nginx-ingress-default-backend-67f8db4966-nlgdd   1/1     Running   0          2d18h
  
  </code></pre>
  
  <p>after that my nodePort: 30080 is only available against tcp6, due to this, im facing connection refused when try to access from other vm.</p>
  
  <pre><code>[ottuser@ottorc01 ~]$ netstat -tln | grep '30080'
  tcp6       3      0 :::30080                :::*                    LISTEN
  </code></pre>
  
  <pre><code>[ottuser@ottwrk02 ~]$ netstat -tln
  Active Internet connections (only servers)
  Proto Recv-Q Send-Q Local Address           Foreign Address         State
  tcp        0      0 127.0.0.1:10248         0.0.0.0:*               LISTEN
  tcp        0      0 127.0.0.1:10249         0.0.0.0:*               LISTEN
  tcp        0      0 127.0.0.1:6443          0.0.0.0:*               LISTEN
  tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN
  tcp        0      0 10.18.0.10:2379         0.0.0.0:*               LISTEN
  tcp        0      0 10.18.0.10:2380         0.0.0.0:*               LISTEN
  tcp        0      0 0.0.0.0:8081            0.0.0.0:*               LISTEN
  tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
  tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN
  tcp        0      0 127.0.0.1:33372         0.0.0.0:*               LISTEN
  tcp6       0      0 :::10250                :::*                    LISTEN
  tcp6       0      0 :::30443                :::*                    LISTEN
  tcp6       0      0 :::32427                :::*                    LISTEN
  tcp6       0      0 :::31726                :::*                    LISTEN
  tcp6       0      0 :::10256                :::*                    LISTEN
  tcp6       0      0 :::22                   :::*                    LISTEN
  tcp6       0      0 :::30462                :::*                    LISTEN
  tcp6       0      0 :::30080                :::*                    LISTEN
  
  </code></pre>
  
  <p>Logs from <code>pod/x2f1-nginx-ingress-controller-cd5fbd447-c4fqm</code>:</p>
  
  <pre><code>[ottuser@ottorc01 ~]$ kubectl logs pod/x2f1-nginx-ingress-controller-cd5fbd447-c4fqm -n ingress-nginx --tail 50
  -------------------------------------------------------------------------------
  NGINX Ingress controller
    Release:    0.24.1
    Build:      git-ce418168f
    Repository: https://github.com/kubernetes/ingress-nginx
  -------------------------------------------------------------------------------
  
  I0621 11:48:26.952213       6 flags.go:185] Watching for Ingress class: nginx
  W0621 11:48:26.952772       6 flags.go:214] SSL certificate chain completion is disabled (--enable-ssl-chain-completion=false)
  nginx version: nginx/1.15.10
  W0621 11:48:26.961458       6 client_config.go:549] Neither --kubeconfig nor --master was specified.  Using the inClusterConfig.  This might not work.
  I0621 11:48:26.961913       6 main.go:205] Creating API client for https://192.168.0.1:443
  I0621 11:48:26.980673       6 main.go:249] Running in Kubernetes cluster version v1.14 (v1.14.1) - git (clean) commit b7394102d6ef778017f2ca4046abbaa23b88c290 - platform linux/amd64
  I0621 11:48:26.986341       6 main.go:102] Validated ingress-nginx/x2f1-nginx-ingress-default-backend as the default backend.
  I0621 11:48:27.339581       6 main.go:124] Created fake certificate with PemFileName: /etc/ingress-controller/ssl/default-fake-certificate.pem
  I0621 11:48:27.384666       6 nginx.go:265] Starting NGINX Ingress controller
  I0621 11:48:27.403396       6 event.go:209] Event(v1.ObjectReference{Kind:"ConfigMap", Namespace:"ingress-nginx", Name:"x2f1-nginx-ingress-controller", UID:"89b4caf0-941a-11e9-a0fb-005056010a71", APIVersion:"v1", ResourceVersion:"1347806", FieldPath:""}): type: 'Normal' reason: 'CREATE' ConfigMap ingress-nginx/x2f1-nginx-ingress-controller
  I0621 11:48:28.585472       6 nginx.go:311] Starting NGINX process
  I0621 11:48:28.585630       6 leaderelection.go:217] attempting to acquire leader lease  ingress-nginx/ingress-controller-leader-nginx...
  W0621 11:48:28.586778       6 controller.go:373] Service "ingress-nginx/x2f1-nginx-ingress-default-backend" does not have any active Endpoint
  I0621 11:48:28.586878       6 controller.go:170] Configuration changes detected, backend reload required.
  I0621 11:48:28.592786       6 status.go:86] new leader elected: x2f1-ngin-nginx-ingress-controller-567f495994-hmcqq
  I0621 11:48:28.761600       6 controller.go:188] Backend successfully reloaded.
  I0621 11:48:28.761677       6 controller.go:202] Initial sync, sleeping for 1 second.
  [21/Jun/2019:11:48:29 +0000]TCP200000.001
  W0621 11:48:32.444623       6 controller.go:373] Service "ingress-nginx/x2f1-nginx-ingress-default-backend" does not have any active Endpoint
  [21/Jun/2019:11:48:35 +0000]TCP200000.000
  I0621 11:49:05.793313       6 status.go:86] new leader elected: x2f1-nginx-ingress-controller-cd5fbd447-c4fqm
  I0621 11:49:05.793331       6 leaderelection.go:227] successfully acquired lease ingress-nginx/ingress-controller-leader-nginx
  I0621 11:53:08.579333       6 controller.go:170] Configuration changes detected, backend reload required.
  I0621 11:53:08.579639       6 event.go:209] Event(v1.ObjectReference{Kind:"Ingress", Namespace:"ott", Name:"hie-01-hie", UID:"32678e25-941b-11e9-a0fb-005056010a71", APIVersion:"extensions/v1beta1", ResourceVersion:"1348532", FieldPath:""}): type: 'Normal' reason: 'CREATE' Ingress ott/hie-01-hie
  I0621 11:53:08.764204       6 controller.go:188] Backend successfully reloaded.
  [21/Jun/2019:11:53:08 +0000]TCP200000.000
  I0621 11:54:05.812798       6 status.go:295] updating Ingress ott/hie-01-hie status from [] to [{ }]
  
  </code></pre>
  
  <pre><code>[ottuser@ottorc01 ~]$ sudo ss -l -t -p | grep 30080
  LISTEN     3      128       :::30080                   :::*                     users:(("kube-proxy",pid=29346,fd=15))
  
  </code></pre>
  
  <p>Is there any way to debug it in further depth or add that port to tcp/ipv4. If still something unclear from my side let me know. Thanks in advance.</p>