Gegroet, I have a tunnel at home where I want to use my mac (running MacOSX 10.3.9) as gateway. Setting up and starting aiccu is no problem. I configure my local subnet on my en3-interface (my airport card), and enable IPv6 forwarding. However, when I start up "rtadvd" on en3 (my airport card), about 10 seconds later, the default gateway for IPv6 has changed from "tun0" to the link local-IP-address of my en3 interface. ??????? Anybody any idea? Cheerio! Kr. Bonne.