Thanks for that feedback.  This is what we need to know.
/jim 

> -----Original Message-----
> From: Mohacsi Janos [mailto:[EMAIL PROTECTED] 
> Sent: Friday, March 18, 2005 11:52 AM
> To: Bound, Jim
> Cc: Michael Banta; [email protected]
> Subject: RE: 2002 addresses
> 
> Hi Jim,
>       I tried teredo and I found much easier to provide IPv6 
> connectivity to a NAT-ed segment enabling IPv6 firewalling on 
> the firewall 
> or add additional IPv6 capable firewall next to the IPv4 only 
> firewall. 
> From security point of view Teredo relay can be used as a source of 
> malicious traffic. Teredo is difficult to deploy, since you 
> need externel 
> teredo server to rely on.
> 
> Regards,
> 
> Janos Mohacsi
> Network Engineer, Research Associate
> NIIF/HUNGARNET, HUNGARY
> Key 00F9AF98: 8645 1312 D249 471B DBAE  21A2 9F52 0D1F 00F9 AF98
> 
> 
> On Fri, 18 Mar 2005, Bound, Jim wrote:
> 
> > Teredo is not a nightmare.  But it does require 
> coordinating functions
> > and nodes externally.  I am not advocating but I do not like to see
> > folks declare any hardwork or ideas as nightmares at this 
> point we have
> > so little.  Teredo spec documents its limitations as all 
> mechanisms.  It
> > also permits one to punch through the firewall which can be 
> dangerous
> > without proper diligence.
> >
> > /jim
> >
> >> -----Original Message-----
> >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> >> Behalf Of Mohacsi Janos
> >> Sent: Friday, March 18, 2005 7:02 AM
> >> To: Michael Banta
> >> Cc: [email protected]
> >> Subject: Re: 2002 addresses
> >>
> >>
> >>
> >>
> >>
> >> On Thu, 17 Mar 2005, Michael Banta wrote:
> >>
> >>> Ok, things are starting to make a little more sense, 
> thank you all.
> >>>
> >>> I was ready to assign an IP of 2002: to a windows xp client
> >> when I realized
> >>> that this machine is behind a firewall and has a nat'ed address of
> >>> 10.0.10.x.  I would not think that would be allowed.
> >>>
> >>> Is this a correct assumption?
> >>
> >> Yes. For 6to4 you need at least one global IPv4 address on
> >> your router.
> >> Behind NAT you might try to use Teredo nightmare....
> >>
> >> Regards,
> >>
> >> Janos Mohacsi
> >> Network Engineer, Research Associate
> >> NIIF/HUNGARNET, HUNGARY
> >> Key 00F9AF98: 8645 1312 D249 471B DBAE  21A2 9F52 0D1F 00F9 AF98
> >>>
> >>> Thanks
> >>> Mike
> >>>
> >>>
> >> 
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