CNAME records (was: Re: dynamic DNS within a non-dynamic domain)
[posting this to debian-user because it doesn't belong in debian-devel]
On 3 Mar 1998 bruce@va.debian.org wrote on debian-devel:
> bruce@va.debian.org writes:
> > I am using dynamic DNS on perens.debian.org, a laptop with a radio modem.
> > It works _excellently_.
>
> From: Rob Browning <rlb@cs.utexas.edu>
> > Hmm. I must not understand how this works. I thought if you used
> > ml.org, your name had to be under ml.org, hence my other post about
> > the feasibility of dns.debian.org.
>
> I just use a CNAME record: perens.debian.org -> perens.dyn.ml.org .
Talking about CNAME records, I have a question about that.
I have a static IP address, 130.89.222.95. My FQDN is
cal011205.student.utwente.nl. There is a CNAME record
blaakmeer.student.utwente.nl -> Cal011205.student.utwente.nl. Also, there
are two MX records for cal011205.student.utwente.nl. One with priority 10
that points to cal011205.student.utwente.nl and another with priority 100
that points to schuimpje.snt.utwente.nl, which is a backup mail server.
When I send mail, most of the time the MTA seems to be doing a DNS lookup
for the hostname in the From: line and so
"remco@blaakmeer.student.utwente.nl" is replaced by
"remco@Cal011205.student.utwente.nl".
I don't know if it's my smail or the receiving end that is doing the DNS
lookup. Does anybody else have the same problem? Is it the default
behaviour for one or more MTAs? Is it a Good Thing or a Bad Thing? I would
be happy to turn it off, since everything is properly configured for me,
if that's at all possible.
Remco
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