I’m glad my remarks were of some help but I have to admit that what I described is almost the limit of my understanding in this.
I did build such a system several years ago but haven’t done any website configuration since. However I do remember that it’s possible that the process that timed out produced some error message entry to your apache server logs. Have you checked them? Also, are you using the domain name (example, http://mywebsite.com/openemr ') or the numeric IP address (e.g., https://192.168.0.10/openemr ) ? When connecting to internal IP addresses, generally speaking, you have to use the numeric IP instead of the domain name.
It looks like this is where you get to go all old- school geek, and research the issues and learn the details of website configuration on your own. I searched the internet with DuckDuckGo for “internal IP network configuration” and got some very useful- looking returns.
Or you might try posting more questions here in the forum, though I do not think that strictly speaking what you are looking for is an OpenEMR- related question.
Good luck and please do post back here anything interesting you may find!
Best - Harley