CARP Protocol Requests Blocked on pfSense 2.8.0 HA Setup

[shura30]

Hello everyone,

My setup is as follows:

2 identical bare-metal pfSense CE 2.8.0 installations configured with High Availability
Kea DHCP
CARP VIPs configured on multiple interfaces/VLANs

I'm seeing a high volume of blocked CARP protocol requests in the firewall logs, originating from the primary pfSense node to 224.0.0.18.

Interestingly, the interface shown in the logs is not even directly assigned — it’s used for WAN and is part of my ISP-provided VLAN.

I’ve already tried adding an explicit pass rule (using easyrule or by assigning em3 to an interface manually), but the traffic is still being blocked, logged and makes the log cluttered in case of other uses.

Is there anywhere else I should look or configure to allow/reduce these CARP advertisements?