I am trying to establish whether the issue I am having is specific to my setup or whether it effects everyone. I have setup my Apple Airport Extreme to use the "automatic tunnel" as described here: https://www.sixxs.net/wiki/Apple_Airport and I am connected to my service provider using PPPoE. Behind the router I have a computer with an Apache 2.2 web server running, listening on both IPv4 and IPv6. When I try to connect to that computer on port 80, using the routable IPv6 address it does not respond. I have even deactivated the firewall for my attempts. Since previously I had been using Aiccu and had managed to connect to the server that way, I am quite certain that the server is binding to port 80 on the IPv6 stack. Connecting using the IPv4 address works, as does the non-routable IPv6 address from within the subnet. Has anyone run into this issue? Is there a known work around? BTW In the meantime I have opened up radr://7263443 at Apple.