DNS subnets

[Guest]

Am I correct in assuming that DNS zone transfers cannot happens accross different subnets ie. if you have two AD domains DNS AD int. or Primary/secondary zones each in a different subnet

Also would forwarders or root hints work accross subnet

 

[Marc Reynolds [MSFT]]

No, DNS Zone transfers, forwarders and root hints will all work across
subnets as long as the routers are open to TCP and UDP port 53 traffic.

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Thanks,
Marc Reynolds
Microsoft Technical Support

This posting is provided "AS IS" with no warranties, and confers no rights.

Am I correct in assuming that DNS zone transfers cannot happens accross

different subnets ie. if you have two AD domains DNS AD int. or
Primary/secondary zones each in a different subnet.

 

[Herb Martin]

Am I correct in assuming that DNS zone transfers cannot happens accross
different subnets ie. if you have two AD domains DNS AD int. or
Primary/secondary zones each in a different subnet.

No. What gave you that impression (we might be missing
some hidden assumption in your question)?

Also would forwarders or root hints work accross subnets

DNS is based on IP, which is routable. It doesn't use broadcasts
(which are localized to one subnet usually.)

So, if routing works and the DNS traffic isn't filtered by a firewall
(etc.) then DNS works, client to server, server to server.

Why might routing fail? Private addressing might be such a problem.
You cannot expect client access to initiate from a public addresses
through a NAT to a private address (by default.)
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