Does Ubuntu Desktop have dual IPv4 and IPv6 stack?

[TonyUb]

Folks,

ISPs over my way are starting to provide IPv6 (e.g. http://ipv6.internode.on.net/) on their networks. Windows Vista has a dual IPv4/IPv6 stack.

Just wondering if Ubuntu has a similar way of doing things?

Regards

Tony

[cariboo907]

The short answer is yes. To see that ipv6 is enable in a terminal tyoe:

cat /etc/hosts

you should see something like this:

::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

and in a terminal:

ifconfig

resulting in:

eth0 Link encap:Ethernet HWaddr 00:16:17:9c:84:b5
inet addr:192.168.1.102 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::216:17ff:fe9c:84b5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2533301 errors:0 dropped:0 overruns:0 frame:0
TX packets:2602888 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2168547669 (2.1 GB) TX bytes:993080586 (993.0 MB)
Interrupt:20 Base address:0xe000

Note the inet6 addr:

Jim

[TonyUb]

Interesting.

Say I didn't want to use DHCP and want to give a Ubuntu Desktop box a "fixed" IP address of 192.168.0.11 under IPv4 could you please advise how I can give the Ubuntu Desktop box also an IPv6 "fixed" IP address as well?

Also, if I wanted to use just one stack is there a way of disabling the other? Please advise.

Finally, I gather that IPv6 has additional security provisions (e.g. encryption?) is this enabled by default?

Regards,

Tony