CNAME vs A?

[David Cost]

I also found that NSLINT would not let me create two "A" records, and I read
that you cannot use a CNAME for your mail server but needed an "A" record as
well. So what I did and it "Appears" as though it may have worked, was use
the  ;EXTREF tag at the end of the additional  "A" record. Now I can't
figure out how to create a "PTR" entry that NSLINT will allow.


"Dave Lers" <davelers at home.com> wrote in message
news:6XEpOSyb=EsAYalwX4k8mXGYy7pE at 4ax.com...
> I posted a similar question w/ no reply, this is bugging me so I'm
> trying again.
>
> I know the following is correct
>
> dalrun.com. IN A 24.16.244.57
> www.dalrun.com. IN CNAME dalrun.com.
> dalrun.com. IN MX      5 dalrun.com.
> dalrun.com. IN NS dalrun.com.
>
> but I have seen the following also claimed to be correct, nslint tells
> me its not and, with one exception, I've never seen it used in the
> documentation I've found, yet I also haven't seen anything that says
> its a bad thing. An aye or nay with an explanation, or a pointer to
> one, would be appreciated.
>
> dalrun.com. IN A 24.16.244.57
> www.dalrun.com. IN CNAME dalrun.com.
> mail.dalrun.com. IN A 24.16.244.57
> dalrun.com. IN MX      5 mail.dalrun.com.
> ns1.dalrun.com. IN A 24.16.244.57
> dalrun.com. IN NS      ns1.dalrun.com.
>
> I've seen it 2x in a row now with NS records (different A records
> using the same IP). With CNAME's and aliases in Apache I'm fine (and
> sendmail looks doable the same way) but what about DNS ?, with a
> single IP it seems I'm stuck with dalrun.com. Am I missing something,
> is there an acceptable way, with a single IP, to use ns1.dalrun.com
> for my NS record?
>
> --
> Dave Lers
> http://www.BaywoodDesign.com/
>
>
>