> X [time] STB 0.0.0.0, port 68 255.255.255.255, port 67 UDP
> I have set up a rule to let all outgoing traffic from OPT1 go out, but not
> changed anything for incoming traffic on WAN.
> Any advice on what could be happening?
DHCP can operate on port 67 and 68 UDP - depending on the exact setup of
the server, relay and host.