Ideal way to Enable IPv6 in Debian Squeeze for Mandos Deployment

[Zenny]

Hi:

I have been trying to deploy Mandos server-client pair which
authenticates between each other while rendering mandos client
services to other clients in the network.

I have installed debian squeeze (6.0.6) in two qemu instances behind
NAT which can talk to each other. I use a script from
http://wiki.qemu.org/Documentation/Networking/NAT#Script which
broadcast IPv4 addresses using a br0 device and qemu starts with a tap
device.

However, I was recently told that Mandos requires IPv6 enabled.

So far I did the following to enable it:

# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 52:54:00:12:34:56
          inet addr:192.168.53.160  Bcast:192.168.53.255  Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:fe12:3456/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:268 errors:0 dropped:0 overruns:0 frame:0
          TX packets:201 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:22377 (21.8 KiB)  TX bytes:26734 (26.1 KiB)
          Interrupt:11 Base address:0xc000

IPv6 enabled in avahi:
# cat /etc/avahi/avahi-daemon.conf | grep ipv6
use-ipv6=yes
##publish-a-on-ipv6=no

Prioritized ipv6 in nsswitch.conf:
# cat /etc/nsswitch.conf | grep mdns
##hosts:          files mdns4_minimal [NOTFOUND=return] dns mdns4
hosts:          files mdns_minimal [NOTFOUND=return] dns

Installed rdnssd:
#aptitude install rdnssd

To filter network flow:
# aptitude install iptables iptables-persistent radvd

Appended IPv6 forward in sysctl.conf
#echo "net.ipv6.conf.default.forwarding=1" >> /etc/sysctl.conf

Can anyone tell me what else that I need to configure to make the pair
work? Whether this should be done both in the server running
mandos-server and mandos-client or only in mandos-server?

Still not working. :-(

Any help will be appreciated!

/zenny