I would like to use Wireguard to add the possibility to get to IPv6

[Wangpawla05]

I have only IPv4 at home, and I would like to use Wireguard to add the possibility to get to IPv6 only servers.

I rented a VPS at netcup, installed OPNsense there, with the IPv6 subnet aaaa:bbbb:cccc:dddd::/64 and a IPv4 of www.xxx.yyy.zzz. In OPNsense, for WAN, I have set to use DCHP for IPv4 and Static for IPv6 with aaaa:bbbb:cccc:dddd::1/64 as my WAN IPv6 and fe00::1 as gateway. I check with ping that both IPv4 and IPv6 work.

I have followed the Road Warrior guide, initially with only IPv4 to test it out. So the Wireguard tunnel have the IPv4 subnet of 10.10.10.0/24. With only IPv4, the tunnel worked.

Now that I have IPv4 tunnel working, I started to add IPv6 to the Wireguard local interface (aaaa:bbbb:cccc:dddd::a:1/64 in addition to 10.10.10.1/24), and endpoint Allowed IPs (aaaa:bbbb:cccc:dddd::a:2/128 in addition to 10.10.10.2/32).

Client interface IP is aaaa:bbbb:cccc:dddd::a:2/64 and 10.10.10.2/24, allowed ips 0.0.0.0/0, ::/0

After applying the settings, I am able to connect to the tunnel on the client, ping works for aaaa:bbbb:cccc:dddd::1, aaaa:bbbb:cccc:dddd::a:1, but everything outside outside of the OPNsense's aaaa:bbbb:cccc:dddd::/64 is not reachable (I can't ping 2606:4700:4700::1111). However, IPv4 internet is available (I can ping 1.1.1.1).

What did I miss?
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