how to set up ipv6 on Ubuntu guest with Windows host

[ingber]

My host is Windows 7 Ultimate x64, and my VBox host is Ubuntu 11.04 x64. The host (and guest) are behind a router.

I have a working ipv6 tunnel set up through tunnelbroker.net on my router and on my Windows host, which seems to be working fine.

I do not see how to set up my Ubuntu guest to also use both ipv4 and ipv6?

I used tunenlbroker.net info for setting up Linux (not necessarily a VBox guest!?):
ifconfig sit0 up
ifconfig sit0 inet6 tunnel ::their_ipv4
ifconfig sit1 up
ifconfig sit1 inet6 add my_ipv6_tunnel
route -A inet6 add ::/0 dev sit1

In Ubuntu, I have added nameservers in /etc/resolv.conf
nameserver 2620:0:ccc::2
nameserver 2620:0:ccd::2
nameserver 208.67.222.222
nameserver 208.67.220.220

My ifconfig -a on the Ubuntu guest gives:

ifconfig -a
eth1 Link encap:Ethernet HWaddr 08:00:27:36:4c:7d
inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: some_fe80_ipv6_address Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1652 errors:0 dropped:0 overruns:0 frame:0
TX packets:1778 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:693470 (693.4 KB) TX bytes:277722 (277.7 KB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:480 (480.0 B) TX bytes:480 (480.0 B)

This does not work, e.g., by testing from a browser in Ubuntu to
http://ipv6/google.com
http://testipv6.com

Thanks.

Lester

[Sasquatch]

You've set the VM to use NAT, that won't do. You have to use Bridged.