- LAN on eth0: #Kea #DHCP serving internal hosts
- WAN on eth0.3: DHCP client talking to ISP

Kea: „I don't care about VLAN tagging, give me all your packets for my raw socket. By the way, how about using this nice internal LAN address for my hosts WAN interface?“

https://gitlab.isc.org/isc-projects/kea/-/issues/1117

At least the issue has recently been closed (after six years). Now waiting for an updated package to arrive. Or an alternative - whatever comes first. Any recommendations apart from dnsmasq?