How to integrate a server into a home network?

Question

Computer networks

Good day everyone!
I ask for help in integrating the server (PC, Windows Server 2019) into the home network. What exactly interests you - in the home network, 2 routers (1 main with elevated services, 2 to expand Wi-Fi coverage with a gateway to the first one (like a repeater)), who lives on the network - Wi-Fi, laptops, tablets, phones, PS , all domestic living creatures from gadgets + guests ... Why - for the server - for training, experiments ... Its roles are AD, VPN server, dns (so that the whole thing works) ...

Now the crux of the matter is that the network seems to be set up and working. Everything goes through 1 router (dns, dhcp...) everything else seems to be by default. In order to raise the server, especially if AD will live there, you need to raise dns - so for sure, this is a critically dependent service. What else is critically dependent for blood pressure and VPN?
So, the router is already configured (at least by default) with its own DNS. How to make friends with the new theme on the server? Will there be "porridge" in the network traffic, will they conflict? Where and how what, you need to configure everything to work together and correctly, tell me please! Preferably easier.

In principle, I understand the work of DNS. But in order to understand to the end, the principle of operation of the entire tapology of my network, here I am a little lost, stupid.

I want to set up DNS with a link to public servers, such as Google or Amazon Route 53 (something new, interesting, like free), bypassing the provider. So that I could go to mail.ru, it so happened that I have a mail there, to which a lot has been attached for many years. I do not want to lose, to untie - a lot of trouble.

Thanks in advance for all the explanations and advice!

Answer 1

Since the network is home and the server is for experiments...
On the router, use the handles in the DHCP settings in the DNS fields to specify the IP address of the AD server SECOND (the first one is either the provider or 8.8.8.8)
This will eliminate problems with the Internet while the AD server is for some reason will be turned off (and, accordingly, the DNS server on it). Those. the presence of the Internet for any gadgets will not depend on the server
. What is the main router? Isn't it easier to set up a VPN server on it?
Or do you just want to experiment and learn on your own?

Answer 2

That device which will distribute DHCP should distribute 2 addresses.
1 of your server with AD, the second - of the router
Either hang the entire DNS on the server with AD, and remove
PS vpn from the router on the server with Windows - such an occupation of course ... if not stupidly under Windows and SSTP