Have issues setting up IPv6 VPN in OPNsense

[twistabled4alt 0]

Hello,
I have set up AirVPN following this guide : https://airvpn.org/forums/topic/67976-howto-opnsense-using-wireguard-with-ipv6-support/ , it worked pretty nice for ipv4, but I got problems with ipv6.

I don't really have the same setup as in the tutorial as to make the IPv6 works I had to setup the LAN interface IPv6 to follow the IP of WAN, which in this case return the correct IP.

 

But there is a problem, I've setup NAT (I know it shouldn't really be done this way...) for IPv6 but the translation is not really working and ipv6-icmp requests doesn't work.
If someone here could be helpful, I would greatly appreciate it!
Have a good day.

[twistabled4alt 0]

Hey, digging down I think that there's a issue somewhere with ICMPv6,
when doing "curl -6 ifconfig.me" I get the correct response, AirVPN IP, here's the packet :

Interface    Protocol   Source                                                                               Destination
WG_INT    TCP         [fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX]:7263    [2600:XXXX:X:XXXX::]:80

when doing "curl -6 https://ipleak.net/json/" on the other hand, gives me no results, and the packet has the same source as dest address:

Interface    Protocol     Source                                                                               Destination
WG_INT    ICMPv6      fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX              fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX
WG_INT    ICMPv6      fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX              fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX
WG_INT    ICMPv6      fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX              fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX
WG_INT    ICMPv6      fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX              fd7d:76ee:e68f:a993:XXXX:XXXX:XXXX:XXXX

(the packet is repeatedly sent without any response or result..)

I've followed the community guide and set up correctly the whole thing but it's not working,
If you have an idea,
Have a great day!
@OPN-UserGuide @Staff @Tech Jedi Alex

[Tech Jedi Alex 1524]

.. don't look at me  I've never run OPNsense, and so never read the linked guide, so there's no experience to draw ideas from.. sorry!