Problem
When kube api Enabling Reverse Proxy when the Kube API server is not accessible from outside then reverse proxy can be enabled.
Cause
Kube API server is hosted internally in the Kube master. Hence, with private IP it can be accessed from by the outside world.
Fix
Follow this URL https://devops.profitbricks.com/tutorials/configure-apache-as-a-reverse-proxy-using-mod_proxy-on-ubuntu/