Comment 2 for bug 1841802

Ports are open for tcp6 only.

[sysadmin@controller-0 ~(keystone_admin)]$ kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
hk-hello-kitty-hello-kit NodePort 10.101.117.251 <none> 55555:31987/TCP 5h25m
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 7h16m

[sysadmin@controller-0 ~(keystone_admin)]$ sudo netstat -tulpn | grep LISTEN | grep 31987
tcp6 0 0 :::31987 :::* LISTEN 121595/kube-proxy

Note that same issue is seen with stx-openstack horizon port 31000, causing openstack horizon unreachable.

[sysadmin@controller-0 ~(keystone_admin)]$ sudo netstat -tulpn | grep LISTEN | grep 31000
tcp6 0 0 :::31000 :::* LISTEN 121595/kube-proxy