Issue with Kea DHCP server

Started by coatmaker618, October 15, 2025, 04:39:08 PM

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I have a new OPNSense install that I am setting up, and one of the new things I'm doing is using Kea as the DHCP server instead of the (apparently now defunct per https://docs.opnsense.org/manual/isc.html#isc-dhcp) ISC.

So far I really like Kea from a GUI perspective, it's much more straightforward and clear than ISC so I'd prefer to keep using it.  However I am not getting DHCP assigned on my LAN.  Interestingly, I am seemingly getting DHCP addresses on the VLANs (at least from a preliminary look).  I know everything is setup correctly as setting a static IP on my desktop (on the LAN) works perfectly.

To confuse things further I went to Kea's logs and did a few searches which seem to indicate that it is seeing a DHCP request from my desktop and trying to issue a DHCP lease to it -- at least per my reading of the logs.  I've attached the results of a search of the desktop MAC (which is not getting an IP via DHCP).

It turns out that while setting up I did unintentionally activate dnsmasq, but that has been stopped and OPNSense has been rebooted so I hope that's now just a red herring.

Post your interface assignments and IPs, Kea settings and subnets.