IPv6 on OPNsense

[steilfirn_8000]

Hello fellow everyone,

I am seeking for guidance/help.
As my ISP does not support IPv6 I decided to use HE tunnelbroker.net.

My current network setup would be:
Internet --> Mikrotik router --> 2x OPNsense HA firewalls --> LANs

LANs:
192.168.10.0/24
192.168.11.0/24
192.168.12.0/24
and so on.

On Mikrotik router I have added the routable IPv6 and advertise it.

On OPNsense I use "SLAAC" on IPv6 at WAN interface.

For my internal LAN interfaces I use "track" with WAN interface.


So far my devices behind OPNsense do get IPv6 address but connectivity is a pain.

Sometimes I can ping remot IPv6 hosts - sometimes I can't.

After a restart OPNsense is using it's own local-link address as a default gateway?

It seems it's nearly impossible to get a proper setup with OPNsense and IPv6 for my subnets.


Can someone enlight me?