ipv6 question

[Michael Fleming]

On Sun, 31 May 2009 23:38:52 +0200
Michael Casey <michaelcasey73 at gmail.com> wrote:

> Hi
> 
> I just want to ask one big question :)
> 
> If I would have an IPv6 address [home pc, behind a router -
> supporting ipv6 e.g.: openwrt, ISP gives ipv6], then I can see an
> IPv6 address with ifconfig, on the PC e.g.: "Z"
> So that's my "very unique address". - "Z"
> 
> Can that be "seen on the internet", the "Z" address? so anyone can
> ping me from outside, or do an nmap?

Yes, if the IPv6 address has a "global" prefix (2001:: 2002:: etc) -
fe80:: etc are "link local" addresses and are site specific - they
won't be available to the wider Internet.

> Or are there private addresses what the router gives to my pc.: eg.:
> with ipv4 a router could give 192.168.1.10... and that IP couldn't be
> pinged/nmapped from outside (More Secure???)
> Because I heard that there will be no NAT with IPv6?

There's no NAT in IPv6, at least in the "traditional" IPv4 way.

 If you're only getting fe80:: et. al addresses (the link-local
 addresses as above) you should be fine however.

> 
> What will happen to e.g.: a windows xp pc using IPv6? The "C$, D$....
> shares" will be visible to anyone if they know the password?
> sorry for the trivial question... :S :) and thank you for any answer

If the host isn't firewalled and has globally routed IPv6 allocations
then yes they would be available (they'd need to know Administrator
passwords for the admin shares above though)

Michael.

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