On Thursday 04 December 2003 12:36 am, Meng Weng Wong wrote:
Eric Allman just emailed me his thoughts on the draft-02.9.txt.
He doesn't like the complexity of the a, mx, ptr, etc directives;
he feels that the only directives that should be there are ip4 and ip6.
This is backwards in terms of the DNS design principles as laid out in RFC1035
section 3.6, to wit:
"The present system attempts to minimize the duplication of data in the
database in order to insure consistency. Thus, in order to find the address
of the host for a mail exchange, you map the mail domain name to a host name,
then the host name to addresses, rather than a direct mapping to host
address. This approach is preferred because it avoids the opportunity for
inconsistency. "
Applying this, the preferred mechanisms should be A, MX and PTR. There is
actually a very good case for disallowing IP4 and IP6 mechanisms entirely.
- Dan
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