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DNS config for correct reverse/forward resolution

Hello,
i'm having quite an issue with several UTM boxes where the IPs are rarely -if ever- corectly resolved to the internal LAN hostnames.
for example: traffic monitor never resolves anything, but logging at least tries(some show, but most of them say "NXDOMAIN")
i have:
1) DNS forwarder set to the internal AD server(for AD logins) and PF rule for dns out from server
2) request route for "domain.local" -> AD server
3) request route for "0.168.192.in-addr.arpa" -> AD server (i was missing this, but NXDOMAIN still shows, does this get updated at some point?)

What do i need to do to make reverse resolution work reliably all the time?(or better put, what's the correct checklist for dns configuration on UTM)


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