Len-
But the following would be OK in the blah.com zone file, right? (If not, I
have a major misunderstanding and some records to fix myself...)
@ A ip.ad.dress.1
MX 10 mail.blah.com.
ftp CNAME ftp.somedomain.net.
www A ip.ad.dress.1
mail A ip.ad.dress.2
ie: within a zone, you can mix A and CNAME records...
----- Original Message -----
From: "Len Conrad" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, January 25, 2006 3:50 PM
Subject: Re: [IMail Forum] DNS confusion...
sounds good, now why?
Len Conrad wrote:
we've debated in-house whether it should be an host or a cname but never
found any concrete difference is why I asked.
avoid CNAME unless you know you have solid justification.
K I S S.
CNAMEs work fine, but many people don't know the restrictions on CNAME,
and screw up their zones.
The basic rules is that a domain name that "owns" a CNAME/alias record
cannot own any other record.
A zone name cannot own a CNAME record, because every zone name must OWN at
least an SOA record and 1 NS record.
myzone.com. CNAME anything
... is illegal, meaning the common error of:
myzone.com. CNAME yourzone.com.
... is illegal.
Len
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