CNAME record and a MX record in 8.2.3?
Mark.Andrews at nominum.com
Mark.Andrews at nominum.com
Mon Feb 12 02:37:02 UTC 2001
> I was fighting the same problem and I finally using the A record and it
> works fine for us now. The funny thing is this method works fine under 8.2.2
> and we only get this problem after update to 8.2.3 for security reasons.
It didn't work under 8.2.2. You just ignored the error messages.
>
> Is there any RFC explaining about these CNAME rules?
Yes. RFC 1034 Section 3.6.2. Aliases and canonical names.
>
> The useful thing about using a CNAME to point MY-DOMAIN.COM to
> WWW.OTHERHOST.COM is I will never have to remember to change the A record
> for MY-DOMAIN.COM if the IP of WWW.OTHERHOST.COM changed.
There is a draft-rfc saying how to do this with SRV records.
All it requires is for the brower and cache writers it implement
support.
>
> Thanks,
> Tien Nguyen,
>
> "Bill Larson" <wllarso at swcp.com> wrote in message
> news:9613f3$hee at pub3.rc.vix.com...
> >
> > I am assuming that the zone that this file is for is "wtul.fm". If not,
> > everything that I say is most likely wrong.
> >
> > What it sounds like you are asking is that http;//www.wtul.fm and
> > http://wtul.fm both get redirected to the machine pulse.tcs.tulane.edu.
> >
> > You CANNOT use a CNAME record to redirect traffic for "wtul.fm" to
> > "pulse.tcs.tulane.edu". The basic rule is that the left hand side domain
> > name that is identified with a CNAME record cannot have any other DNS
> > information associated with it. I.e., since "wtul.fm" has SOA and
> > NS records associated with it, you cannot have a CNAME record also.
> >
> > The easiest solution is to have an "A" record for "wtul.fm" which
> > has the sam IP address as "pulse.tcs.tulane.edu". Using a CNAME
> > record for "www.wtul.fm" is completely correct.
> >
> > You have an "A" record for "wtul.fm" which identifies
> "pulse.tcs.tulane.edu"
> > on the right hand side. This line is commented out, so I don't know
> > if this is just a comment for yourself, but I hope so. If you
> > were to uncomment this, you should receive an error when loading.
> > An "A" record must have an IP address on the right hand side.
> >
> > Bill Larson
> >
> > > I had a configuration file for that worked under 8.2.2-P7 . But wouldn't
> > > work in 8.2.3. I am hoping someone can suggest the correct configuration
> > > under 8.2.3.
> > > A CNAME to pulse (see below) fails, as does an A reference to pulse.
> Should
> > > I use an A record to pulse's IP address?
> > >
> > > The server currently resolves http://www.wtul.fm correctly, and sends
> the
> > > mail correctly. However, it is desired that http://wtul.fm resolve also.
> > >
> > > -------file: wtul.fm----------
> > >
> > > ;Start of our authoritative zone
> > >
> > > @ IN SOA ns1.tcs.tulane.edu. hostmaster.tulane.edu. (
> > > 2001020801 ; serial number
> > > 86400 ; refresh once a day
> > > 3600 ; retry every 60 min
> > > 604800 ; expire after 1 week
> > > 86400 ) ; TTL min 1 day
> > >
> > > ;Nameservers for this zone
> > >
> > > IN NS ns1.tcs.tulane.edu.
> > > IN NS ns2.tcs.tulane.edu.
> > >
> > > ;OwnerName TTL Class Type RData
> > > @ IN MX 0 majestic.tcs.tulane.edu.
> > > ; IN A pulse.tcs.tulane.edu.
> > > www IN CNAME pulse.tcs.tulane.edu.
> >
> >
>
>
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at nominum.com
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