Is it safe to have Internal DNS Master have NS records point to DMZ Server?
I have three internal DNS servers, 1 master and 2 slaves, and three DMZ servers, 2 masters and 1 slave. The internal master currently has two NS records pointing to the 2 DMZ Masters. Is this a safe practice? Should I change them to point to the 2 internal slave servers? Is there a limit to the number of NS records?
Thank you for any feed back.