Re: [Int-area] discussion of the ISP shared address idea

[Rémi Denis-Courmont <remi.denis-courmont at nokia.com>]

On Thursday 31 July 2008 15:42:05 ext Jari Arkko, you wrote:
> I forgot to say this in the meeting, but discussion of
>
>     http://tools.ietf.org/html/draft-shirasaki-isp-shared-addr

One thing I am afraid of is, some applications do compute the scope of the 
address of the host they're running on. One well-known example is automatic 
6to4 tunnel setup in some operating systems. By essentially extending the 
RFC1918 space, these applications will break.

The counter argument is of course, that these applications are already 
terminally broken due to widespread statefull firewalls, as well as public IP 
space behind NATs (!) today. I totally agree with that counter-argument.

Nevertheless, unless/until someone writes a "Using IPv4 address scopes 
considered harmful" document, I am not very comfortable going forward with 
draft-shirasaki-isp-shared-addr.

-- 
Rémi Denis-Courmont
Maemo Software, Nokia Devices R&D
_______________________________________________
Int-area mailing list
Int-area at ietf.org
https://www.ietf.org/mailman/listinfo/int-area