Scenario, - New AD on Win 2012 R2 Setup Phase. 3 AD sites - S1, S2 , S3 .Two Writable DCs each in S1 & S2., Only One RODC in S3
Replication partner for Shangai RODC is set to Bangalore DC

I have put forwarder IP in a DC in S1-  DNS server - Service provider IP (public IP)
So as per my knowledge RODC will take the S1 DNS configurations and will use the external IP used in S1 DNS 
for external queries.

In this case query from a local machine in S3 will go to external IP used as forwarder in S1 DNS. 
But I want to alter this -  a query from a S3 machine should go to a public IP in S3 location.
How can I set up the this ?

Hello,

Issue still persist?

Regards,

Mitul aka v-2min

Just because this is an RODC it is read-only for Internal FQDN's. By default it will have a forwarder already configured in the DNS Console. However, you can remove this forwarder and put in your public DNS IP in there so that external requests can go out directly from the site rather than from another site that have a W/R DC.

Just do the following...

- open DNS console

- right click the server name, select properties

- click forwarders

- remove whatever interal IP address is has automatically configured

- enter the ISP Public DNS IP's

All queries that are external will go out at S3 rather than S1.

Will.