How to organize multiple sites on one ip?

Question

Domain Name System

Immediately I ask you not to throw a stick: D

The essence is this.
There is Internet access with a white ip, so far there is one domain name configured at the registrar for this ip
Home network consists of - Router (
custom Padavan
)
several sites are spinning locally, all with different ip)
What was done
- DNS is configured on syno for cache, and that would go not by ip to local sites, but immediately through the domain (to an existing one, and not "published") The
question is, how configure it all so that access to synology is preserved, and there is access to sites by domain names?
All the instructions that I looked at put on the ngnix server and it redirects to the desired site or service),
but I don’t understand how to do it correctly in my case
. I also stumbled upon a proxy server in microtik, but again - put other equipment for routing or organize a proxy server on synology and configure it?

Answer 1

For this, usually, several domains are created that point to 1 ip, and nginx is deployed on this ip, which will redirect requests to the required sites using the requested domain.