Unable to access Internet from LAN/VLANs after reboot

[d8472]

Hi all,

I am running the following:

OPNsense 23.7.11-amd64
FreeBSD 13.2-RELEASE-p7

On an i5 with 4 port Intel NIC, connected to a Ziggo Giga box in bridge mode.

This has been running reliably for the last couple of years with regular updates. However the last week or so I noticed that after a reboot devices on the LAN or VLANs are able to communicate with each other and the Opnsense box but not the Internet.
When I check the firewall logs I can see the traffic is being allowed out, it is like nothing is being returned to the device. The routing table appears to be normal.

I can still connect to the Opensense box over the WAN using my VPN as normal when this happens as well.

What does resolve the issue, is to just go to any interface and hit save and then apply, without changing anything, and after it reloads all of the interfaces everything works as normal.

I cannot see anything unusual anywhere, does anyone else experience this with a recent update?

Thanks!

[d8472]

To add some more info:

I have a LAN for wired devices and about 5 VLANs for wireless devices.

After rebooting a few times, each time the outcome is slightly different, I experienced the following with no obvious reason or pattern:

LAN works but none of the WLAN VLANs
WLAN VLANs all work but not the LAN
Nothing works
LAN and a couple of WLAN VLANs work, but not some of the others.

Every time, it is the same - normal internal access, able to access OpnSense but unable to access the Internet - it seems to be that traffic is not forwarded back to the device trying to access.

Just clicking save then apply on any interface then causes everything to work normally again every single time, after it refreshes all the interfaces.

There doesn't appear to be any difference to the routing table when it is working or not.

IPv6 is completely disabled (as Ziggo is unreliable).
There is only one Gateway and WAN interface.