Can not make api call from hosting server

  .net, api, iis, server, windows

I have an api hosted on iis that is working perfectly when called over the internet however when trying to call it on the same server via postman it can not connect. I have a few websites on this server and it would apear none are accessible on the server but they all work fine externally. The server has access to the internet and other web pages load just nothing hosted on its self.

Source: Windows Questions