Debian IPv6 Tunnel Config
Draft in progress .....
Configuring your etch host then requires you just to edit /etc/network/interfaces and add the following stanza at the end:
auto 6in4 iface 6in4 inet6 v4tunnel address 2001:08B0:XXXX:0001::1 netmask 124 endpoint 81.187.81.6 ttl 64 up ip link set mtu 1280 dev 6in4 up ip route add default via 2001:08B0:XXXX:0001::2 dev 6in4
remembering to change the XXXX to whatever value you've been allocated.
After that just type "ifup 6in4" (as root) and your link should be up.