DNS Forwards or Zones? Or how do I setup a backup + forward.

  • So this is what I want to do:

    I have two domain controllers. Both running DNS for Dynamic Updates, they also run DHCP, so I turned off DHCP on the firewall.

    How would I set it up where

    1. DC1 get DHCP request, registers DNS dynamically, but also uses the Firewall as a a DNS backup, so if the Domain Controllers go down, Pfsense still has those names.

    2. How if a DNS request is coming in to the domain controller, it also forwards a DNS registration TO the firewall? Similar to a dynamic update on Windows DNS. (Since DHCP is NOT running on the firewall).

  • Rebel Alliance Developer Netgate

    For that you would need a full DNS server on the firewall like BIND, not Unbound/dnsmasq. The DNS server would need to get updated from AD like a zone transfer, for example, not individually relayed registrations. Like any other secondary/tertiary DNS setup.

  • LAYER 8 Global Moderator

    So in this scenario both your DCs are down? Because AD can for sure share their dns info.

    If both your DCs are down - you have bigger problems then a copy of your dns records running on pfsense ;)

    But sure running bind on pfsense would allow for zone xfers from your AD dns..

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