pfSense

On a system with a DHCP WAN and more than one IP alias VIP on the same interface the firewall may end up with the temporary DHCP 0.0.0.0 address remaining on the interface at the end of the boot sequence. This bogus address is shown as the interface address in the dashboard widget for Interfaces as well as under Status > Interfaces. The console menu, however, prints the correct address.

I've reproduced it on CE 2.7.1 and Plus 23.09 with as few as 2 (two) IP Alias VIPs. The VIPs do not need to be in the same subnet as the interface to trigger the problem.

It isn't 100% consistent and seems to be much easier to trigger on virtual machines, but we have reproduced it on hardware as well. It isn't specific to network drivers as it's happened on vtnet, em and even lagg interfaces.

Performing a DHCP release/renew from Status > Interfaces returns the interface to normal, as does save/apply changes on the interface.

Of note is that when performing a manual DHCP release, the DHCP address remains on the interface, but 0.0.0.0 and the VIPs are removed.

Though it seems like it might be an issue in the DHCP script, the exact same code paths appear to be executed in the same way in the script with and without the VIPs present.

It does not appear to affect operation of the firewall as far as I've seen yet either, so may be more of a cosmetic annoyance, but something we need to address either way.