openVPN IPv6 forward to localhost will not work

[Deal14]

Hello,

I'm using a virtual IPv4 and IPv6 address for my openVPN server. This is because I cannot use my WAN IP for this.

As a workaround to use IPv4 and IPv6 on same openVPN Server I am using a port forward to localhost and set the localhost as interface in openVPN.

IPv4 ist working great if i use UDP or UDP4. IPv6 will not work at all. If I use the virtual IPv6 directly as openVPN interface everything works as expected.

sockstat shows that openvpn is listening. Live traffic show the rdr is working (attached). openVPN logs will not show any ingoing traffic on IPv6.

Any ideas? I'm struggeling since 8 hours with this problem.
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