NPT 6to4

[dobby]

I have the following configuration:

Firewall directly connected to the web.
Static ipv4 address
6to4 activated on the interface

ipv6 of the interface returns this config
2002:2eed:faf1::
Subnet mask IPv6 /16

Configured internal network
fd00:0:3:1ad3::/64

Added npt rule:
WAN 2002:2eed:faf1:1ad3::/64 fd00:0:3:1ad3::/64

But it acutally does not work and i did not find a debugger for the npt stuff.

Did i configure something wrong?

My other options is to use another router which already gets ip addresses via 6to4. So i used dhcpv6 and the router delegated a /64 network to the firewall. But also with this config it did not work.

Do you have any ideas?