IPv6 Routing(?) keeps stopping

[BrokenRouter]

Brand new install of 20.7, then updated to 20.7.1, on a Protectli FW4B (coreboot).

When I enable IPv6, the WAN interface properly grabs a /128 for itself and grabs a /64 via DHCPv6-PD. The machines inside the LAN get v6 addresses from that prefix, all works as it is supposed to. For about 5 minutes. Then all of the clients are unable to get anywhere with IPv6. When I look at the firewall, it still shows the addresses in place, and the firewall itself can get places via IPv6 if I ssh into it.

https://pastebin.com/UJTswM59 to see system.log filtered down to dhcp6c messages.

Options are nearly all default - DHCPv6 for the WAN interface's v6 config, the LAN interface is tracking the WAN. I did have to send a PD hint for a /64 or else xfinity sends a /60.

All of this mess works fine on my old pfSense box - I moved over because Protectli ships OPNsense preinstalled and I figured why not try it.

Any thoughts/things to try?

Thanks!

[marjohn56]

If you have a windows client, can you do ipconfig /all, Is there a valid v6 gateway, should be link local.


Also try pinging opnsense's WAN and LAN v6 addresses see if they are responding.

[BrokenRouter]

Update -

After making it through a busy weekend, this morning I updated to the development firmware (21.1.a) and it works flawlessly. There's apparently some sort of an IPv6 issue in the current release 20.7.1 firmware.