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Deny access to a DNS host for a subnet

Hello is it possible to deny access to a A host in Windows 2016 DNS for a subnet

So for exemple i don't want that the subnet 172.16.1.0/24 can know about the host OWA

So for exemple if 172.16.1.50 ping OWAi don't want him to know the ip adress

The reason for this is that we have Cellphone and when they connected to the VPN email client don't work because they tried to reach OWA with the internal ip

So i want them to use the external public ip of OWA instead when connected to the VPN

Thanks for the help !

noci

Either create some firewall rule to block the (or better, reject ) the connections from there
or null route (black hole route...) the subnet you want to block.

Some DNS servers have their own access rules.

timgreen7077

VPN is basically your internal network so OWA should work just fine, but the native email client may be affected and not work, but OWA should still work. is that what you are experiencing?

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kevinhsieh

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Justin Yeung

for windows DNS, you are out of luck.

I do not know what is the purpose of this, however the work around is setup a standalone DNS (I assume you are in DMZ), may be 2 servers as the DNS servers for the subnet.

you can configure any record as you wish without breaking the production DNS. (a zone that only sits in the DMZ dns)

Jean-François Guénet

ASKER

Ive done what kevinhsieh told. So i create a NAT Loopback so internal client can access OWA with external ip address and my dns host OWA now point to the external ip address instead of private ip

Thanks !