DNS not working via LAN

[Combatsatellite]

Hello everyone,

I am currently managing a multi-WAN setup and have encountered an issue that I suspect may be related to this configuration.

Despite extensive troubleshooting, I am unable to resolve the following problem: while the firewall can utilize Unbound DNS, LAN clients are unable to use the firewall as their DNS server. Although this is not critical, as the clients are configured to use Quad9 for DNS resolution, I am interested in leveraging Unbound for website blocking purposes.

Additionally, when using an Android device connected via my Wireless Access Point, I receive a "No Internet Connection" error. I believe this may be a result of the DNS issue affecting LAN clients.

For your reference, I have attached a screenshot of the following command executed on one of the clients:

nslookup opnsense.org 10.0.0.1

This command returns a "connection refused" error.

Your expertise and assistance in resolving this matter would be greatly appreciated.

Best regards,
Combatsatellite

[FLguy]

There is minimal context to support this question. 
Is the LAN subnet 10.0.0.0/x?  Is the LAN interface 10.0.0.1? 
Unbound DNS using "Default settings" works most of the time.  So, what settings did you change? 
Is unbound DNS running (Got a green Play button on the top right)? 
Services: Unbound DNS: General > Network Interfaces set to All (recommended)?
Services: Unbound DNS: Statistics > Do you see Queries increasing?

[Combatsatellite]

Yes, the LAN subnet is 10.0.0.0/24  and the LAN interface is 10.0.0.1.

Unbound is on default settings, it is running (and working on the OPNsense as shown under Reporting > UnboundDNS all queries are from 127.0.0.1), setting for Interfaces is set to All (Recommended) and as for the queries it showed 17 then dropped to zero and goes up and down like that 8>0>11.