"They are two queries. If mx1 would be an A, it would be returned in the
first query. Since it's a CNAME, the IP is not returned in the MX query."
So. RFC 5321 5.1, Locating the Target Host, says the CNAME is to be
processed.
"The lookup first attempts to locate an MX record associated with the name.
If a CNAME record is found, the resulting name is processed as if it were
the initial name."
*** PLEASE don't copy me on replies, I'll read them in the group ***
----- Original Message -----
From: "Matus UHLAR - fantomas" <uh...@fantomas.sk>
To: <bind-users@lists.isc.org>
Sent: Tuesday, January 27, 2009 9:01 AM
Subject: Re: BIND 9.6 Flaw - CNAME vs. A Record in MX Records are NOT
"Illegal"
On 27.01.09 08:46, Al Stu wrote:
So then you disagree that the following example returns a valid address
record for srv1?
srv1 300 IN A 1.2.3.4
mx1 300 IN CNAME srv1.xyz.com.
@ 300 IN MX 1 mx1.xyz.com.
1) Select Target Host:
The MX query for xyz.com delivers mx1.xyz.com which is a CNAME.
2) Get Target Host Address:
The A query for mx1.xyz.com delivers the address (A) record of
srv1.xyz.com, 1.2.3.4, and also delivers the alias (CNAME) record of
"mx1.xyz.com".
They are two queries. If mx1 would be an A, it would be returned in the
first query. Since it's a CNAME, the IP is not returned in the MX query.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
It's now safe to throw off your computer.
_______________________________________________
bind-users mailing list
bind-users@lists.isc.org
https://lists.isc.org/mailman/listinfo/bind-users
_______________________________________________
bind-users mailing list
bind-users@lists.isc.org
https://lists.isc.org/mailman/listinfo/bind-users
