Re: IPv6 Home Use to stimulate deployment over IPv4-NAT

["JORDI PALET MARTINEZ" <jordi.palet@consulintel.es>]

No ... any host behind the NAT works fine.

You can create several tunnels, each one to a different host, and it works, but what I unusually do is:

1) 1 host acts as the IPv6 router, including RA (usually my own PC, if in a conference, or my web/email server in my home).
2) All the local-link IPv6 traffic goes to the host in 1)
3) The host in 1) send it to the DSL/NAT box, as payload of IPv4 packets
4) The NAT box forwards the traffic to the correct host (1), because he only see IPv4 ...

The point is that the NAT box isn't configured in any special way, just needs to keep forwarding proto-41, not just UPD/TCP/ICMP.

You only need to configure the tunnel and RA in one host (1) behind the NAT box.

I found some (I will not mention here), that only forward UDP/TCP/ICMP, so then, it doesn't works.

Regards,
Jordi

----- Original Message ----- 
From: "Jeroen Massar" <jeroen@unfix.org>
To: "'JORDI PALET MARTINEZ'" <jordi.palet@consulintel.es>; <v6ops@ops.ietf.org>
Cc: "'Alain Durand'" <Alain.Durand@Sun.COM>; "'Bound, Jim'" <Jim.Bound@hp.com>; <alh-ietf@tndh.net>
Sent: Sunday, February 16, 2003 8:15 PM
Subject: RE: IPv6 Home Use to stimulate deployment over IPv4-NAT


JORDI PALET MARTINEZ [mailto:jordi.palet@consulintel.es] wrote:

> I've observed, that in most of the cases, a NAT box forwards 
> proto-41 as any other UPD or TCP traffic, so I can use my IPv6
> elsewhere ... In my home, hotels, conferences, ...

I wonder to which box (IPv4) behind the NAT it is forwarding
the proto-41 packets then. Unless you configured a default/unmatched
target ofcourse. But then you already configured it correctly ;)

> In my case never requires changing my DSL router 
> configuration, but I agree that if the hotel is filtering 
> proto-41, I will not be able to change it either ;-)

If you are in a hotel you won't have any access to the CPE either.
And the CPE won't know what to do with the proto-41 packets when
it reaches it then. But that's why we've got Teredo. Though one
can always ask himself if it where a policy decision for not
having IPv6 in their network but let's not go there...

Greets,
 Jeroen

> ----- Original Message -----
> From: "Tim Chown" <tjc@ecs.soton.ac.uk>
> To: "Jeroen Massar" <jeroen@unfix.org>
> Cc: "'Alain Durand'" <Alain.Durand@Sun.COM>; "'Bound, Jim'" 
> <Jim.Bound@hp.com>; <alh-ietf@tndh.net>; <v6ops@ops.ietf.org>
> Sent: Sunday, February 16, 2003 6:58 PM
> Subject: Re: IPv6 Home Use to stimulate deployment over IPv4-NAT
> 
> 
> > On Sun, Feb 16, 2003 at 03:18:28PM +0100, Jeroen Massar wrote:
> > >
> > > Which one can do now by simply installing eg the freenet6 client
> > > onto one of the existing windows/*nix boxes which will advertise
> > > the IPv6 prefix onto the local subnet. The only trick here is
> > > to have the CPE forward proto-41 to your v6-gate or using Teredo.
> > > Btw 'just have to add' is sometimes expensive for some people.
> >
> > This is what our IPv6 students tend to do in their homes.  
> It works nicely,
> > but still requires a tweak in the DSL router.
> >
> > Tim

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