My nethserver is accessible to the open internet by the fully qualified domain name. To get the chat server working I changed the host name to my fqdn
and then I edited this section
% Host name:
I was able to login using Pidgin on my desktop and Xabber and Chat Secure on my android device.
I tried to access the ejabber server admin panel however I was unable to. The dev docs said that by default the admin panel is disabled. I am unsure of how to turn it on.