When I run the logs I see an entry:
2018/11/05 20:12:09 [emerg] 1#1: socket() [::]:8443 failed (97: Address family not supported by protocol)Not sure if this is an IPv6 issue or a firewall issue?
This is for IBM API Connect on Kubernetes.
IPv6 does not fully implemented yet. Take a look at this discussion. It is still in progress.