DNS across multiple domains

Question

Hi all,

I have in my home lab two different DNS servers and domains (domain1 subnet 192.168.1.x and domain2 10.0.10.x).

All are working ok separated. Now I needed that both see each other and have updates on both.
Both subnets can ping each other without any problems.

In my DNS server in domain1, I created a secondary zone to Domain2.
In my DNS server in domain2, I created a secondary zone to Domain1.

Both DNS servers can see each other, and records are updated if any changes occur. The problem is when using DNS itself on clients.

What I would like to do, is if a client is using DNS 192.168.1.1 can also resolve the DNS on the 10.0.10.1. Or vice versa. But that doesn't work if I use DNS from domain1 or domain2

I try to set the DNS like 192.168.1.1 from domain1 and the second DNS 10.0.10.1 from domain2, also doesn't work. Only resolve IPs from the first DNS I set in the client. Never check the second.

What is the best way to achieve this?

Thank Yoy

LP

Answer 1

Hello @Luciano Patrão

Welcome to Microsoft QnA

The feature you are looking for is DNS Forwarder!

https://dnsmadeeasy.com/post/what-is-dns-forwarding

it is embeded on DNS Server and you can activate it on both sides

So when a client needs to resolve the other side names , the DNS will Forward the queries to the other DNS server

I hope this helped you !

Please set the answer as accepted in case you found it helpful and upvote!

Best regards!

Answer 2

As I said, DNS forward is set on all DNS servers(domain1 and domain2) and doesn't work.

For testing, I also created a conditional forward for the Domains, but it is still not working.

Does anyone have ideas on how to configure this?

Thank You

Answer 3

Hello @Luciano Patrão

I read your info and depicted a quick diagram since i do not have the time to lab it

I would suggest to remove the secondaries from each domain

I believe it does not make sense to keep zones if you need to resolve separately

Could you kinldy post any updates ?

In case you found my Answer helpful please mark it as Accepted!

BR

Answer 4

To fix this problem I added Domain A in Domain B as a second zone. Did the same in the Domain B secondary Domain A

Then added Named Servers from both domains. Added in the secondary zone the DC Master.

Created also Reverse Lookup Zones, in DCs from Domain A and Domain B.

This did work and now all clients can resolve Domain A and Domain B