What is the next step if this doesn't work?

The port number is included. I can access via my url on a browser just on the app. Looked further into it, here's the issue: Type in URL --> device requests ip of server --> first the device gets the dynamic dns's server ip (not my server ip) --> dynamic dns server reroutes to my server IP A browse...

The port number is included. I can access via my url on a browser just on the app. Looked further into it, here's the issue: Type in URL --> device requests ip of server --> first the device gets the dynamic dns's server ip (not my server ip) --> dynamic dns server reroutes to my server IP A browse...