Topics

1

22.7 Legacy Series / Using manually specified DNS servers for specific devices - Unbound DNS

« on: October 26, 2022, 04:32:59 pm »

Hi all,

I have Unbound DNS configured for some time now and it has worked well for my use case for all devices in the home to use Unbound. This includes firewall rules to block devices using other internal/external DNS addresses other than the OpnSense address.

I now have a device which requires to use a specified DNS server and this is now a problem as all traffic is only allowed using the local DNS address. I have tried applying a NAT port forwarding rule to resolve this as well as trying Query forwarding in the Unbound DNS UI both with no luck.

Port forwarding attempt (referencing https://forum.opnsense.org/index.php?topic=21814.0):
Interface: LAN / VLAN xx
Porto: TCP/UDP
(Source) Address: ALIAS_HOSTS_DNS_REDIR
(Source) Ports: *
(Destination) Address: !This Firewall
(Destination)) Ports: 53 (DNS)
(NAT) IP: specified external DNS IP
(NAT) Ports: 53 (DNS)
Description: Redirect external DNS to specified external DNS

How can I get this working so that a external DNS IP can be sucessfully used for specific devices/IPs?

Thanks