Populate Hostnames in Associated Stations on Dumb AP

Installing and Using OpenWrt
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I would like to display the DNS names of my 3 VLAN leases on the ‘Start’ page of my Unify dumb AP / OpenWrt, as described in Populate Hostnames in Associated Stations. The easy part was installing the arp-scan package. But I can't find the ‘DNS forwarding’ option in OpenWRT 24.10.5. Even if I did, which interface? My gut feeling would be that the interface of my LAN (i.e., the network where I also find the OpenWRT web interface) is the right one. After all, the DNS entries from the VLANs also go to the DNS via the gateway somehow.

See also for my config OpenWRT with Unifi, LAN and VLAN.

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Network - Section DNS:

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Replace /*.in-addr.arpa/192.168.1.1 with the IP of the upstream DNS for any DNS instance you have running on your AP's.

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That wiki page has a link to a forum thread, but it's a slightly outdated post. A little further down in that thread, there's a more correct solution: Dumb AP - Associated Stations Resolver - #48 by 2bluesc
Tested with 24.10 and 25.12.

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