Mark Andrews Mark_Andrews at
Thu Feb 9 21:37:35 UTC 2006

	Why did you post this twice?

	Message-ID: <43EB81DB.4090800 at>
	Message-ID: <43EB7932.9000406 at>

> All-
>     I have several domains that point to my machine at home on my 
> Comcast cable connection which has a name pointed at it through 
> I want to CNAME records in the zone files for the domains 
> that point to my machine, which is not a problem for domains where I 
> have a hostname (i.e.,, etc.), but I 
> also want to point at my name rather than making 
> it an A record pointing at the IP of my machine. However, I can't use a 
> CNAME to do this. Is there an easy way to point (without a 
> hostname) at my name as a CNAME, or does it have to be an A 
> record pointing at an IP?
> Thanks-
> Joel

	Talk to the WC3 forum and get SRV support into browsers.

	What you want to do is not allowed by the DNS protocol.

	RFC 1034:

The domain system provides such a feature using the canonical name
(CNAME) RR.  A CNAME RR identifies its owner name as an alias, and
specifies the corresponding canonical name in the RDATA section of the
RR.  If a CNAME RR is present at a node, no other data should be
present; this ensures that the data for a canonical name and its aliases
cannot be different.  This rule also insures that a cached CNAME can be
used without checking with an authoritative server for other RR types.


Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at

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