[Mark Andrews is right, it is very difficult to separate your message
from the parts you quote, my mail reader does not have a HTML
parser !]
On Wed, Feb 20, 2008 at 01:57:18PM +0100,
Rémi Després <remi(_dot_)despres(_at_)free(_dot_)fr> wrote
a message of 44 lines which said:
The first 64 bits of IPv6 addresses are still available to
identify sites from which connections are initiated.
I was not speaking about you *can* do but about what people *do*
today. A lot of people use the existence (or not) of a PTR record to
grant you access or not. You may tell them "PTR is useless, use the
first 64 bits of the address instead", they won't listen.
PTR RRs are normally used to get names corresponding to prefixes,
not to addresses, so that there is IMU no reverse DNS problem
here.
AFAIK, there is no DNS way to resolve prefixes into names (RFC 1101,
may be? Can we apply it to IPv6 addresses?). A PTR is for a complete
adress, not for a prefix.
_______________________________________________
Ietf mailing list
Ietf(_at_)ietf(_dot_)org
http://www.ietf.org/mailman/listinfo/ietf