FAMP is not working properly. What is the reason?

Question

PHP

Hello everyone
I decided to set up a web server at home on 11 free and install cms opencart on it.
For access from an external network I use ddns. That is, we can say that the site is accessible from the external network. But the pages load very slowly after I installed opencart. I thought that the problem was in the CMS. I installed Wordpress, the same thing. Then I thought that the provider had some qos restrictions, but no.
The most interesting thing is that it works fine at home, if you log in via dns from an external one, then it’s ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo slow and not loading normally. ddns , and through gray ip - 192.168.xx).
FAMP settings were taken from here - https://www.8host.com/blog/ustanovka-famp-stack-v-...
How to install opencart- https://www.google.ru/amp/s/fosskb.in/2016/02/06/i...
Help me figure out what is the reason, how can I fix it. , only a friend could access the site and worked through the CMS. Thanks in advance.

Answer 1

The problem is solved - it was necessary to register one more address in the CMS settings.

Answer 2

Obviously, your host is working fine if everything is given locally.
I didn't really understand why you dismissed the idea of ​​shaping on the provider's side. In my opinion, this is the only version that explains what is going on.
A separate question - if you have a host with a gray IP, how will DDNS help you? Here the miracle is rather that you generally get access to your computer from the outside :-)