I'm in the process of replacing an aging OpenWRT device on my home LAN with an apu4d4 running OpenBSD as my personal router.
I would like to use unbound as a caching DNS server for my local hosts, but I'm trying to figure out how to handle local hostnames. It seems like a common scenario but I can't find a solution that feels like the "right" way. I have two problems, one is trivial compared to the other. My first and very minor issue is that I would like to register my static hosts in a more convenient way than what's currently offered by unbound. From what I understand you would configure your local hosts something like this: local-zone: "home.lan." static local-data: "laptop.home.lan. IN A 10.0.0.2" local-data-ptr: "10.0.0.2 laptop.home.lan" Every time information has to be entered twice there is room for error and inconsistencies, so preferably this list should be automatically generated from a simpler file, maybe /etc/hosts. I can of course easily write such a script, but I'm wondering if there might be a standard, go-to way of doing this. My second and more difficult issue is that I can't seem to find a way to feed information from the DHCP server into unbound, so that locally assigned hosts can be queried by their hostnames. To clarify with an example: 1. I install a new system and in the installation procedure I name it "alice". 2. "alice" asks for and receives an IP number from my DHCP server. 3. Every other machine can now connect to "alice" by name, assuming that "alice" informed the DHCP server of its name when asking for an address. Currently this works because OpenWRT is using dnsmasq which is both a caching DNS server and a DHCP server, so the left hand knows what the right hand is doing. How can I solve this in OpenBSD base without jumping through hoops? Right now I'm considering something that monitors dhcpd.leases for changes and updates a running unbound using unbound-control(8) but I don't feel confident enough writing such a tool that does not miss a lot of corner cases and handle startup/shutdown gracefully. I'm also thinking that it can't be such an unusual use case, so someone surely must have written such a tool already. I just haven't found any in my search. Or am I doing this the wrong way? I've now read about things like mDNS and Zeroconf and Avahi and I'm just getting more and more confused. Ideas are welcome!
