On Feb 25, 2013, at 1:45 PM, Radu Anghel wrote:
> On Mon, Feb 25, 2013 at 6:06 PM, aurfalien <aurfalien@xxxxxxxxx> wrote:
>> Hi,
>>
>> Has any one had problems with mail clients were your DNS is like this;
>>
>> doman.com MX 50 mail.domain.com
>> domain.com MX 100 mail2.domain.com
>>
>> domain.com CNAME www.domain.com
>>
>
> Hello,
>
> You can't mix CNAMEs with other record types.
>
> The whole domain name can't be defined as a CNAME even if you don't
> add any A/MX records to it because it *must* have NS records.
>
> With BIND you can't even load a zone file defined like you suggested.
> named-checkzone complains:
>
> dns_master_load: domain.com.zone:14: domain.com: CNAME and other data
> zone domain.com/IN: loading from master file domain.com.zone failed:
> CNAME and other data
> zone domain.com/IN: not loaded due to errors.
>
> Interesting read: http://tools.ietf.org/rfc/rfc1912.txt pages 5/6 for CNAMEs.
>
> Usually you should use something like:
>
> domain.com IN NS dns.server.com.
> domain.com IN NS other.dns.com.
>
> domain.com IN A x.x.x.x
> www.domain.com IN CNAME domain.com.
>
> domain.com IN MX 5 etc
>
> AFAIK, SSL certs for www.domain are also valid for domain by default
> so that shouldn't be a problem.
Cool info.
I ended up mixing A, MX and NS records but not CNAMEs.
All seems to work although I am waiting for breakage, giving it another day or 2 b4 updating our external DNS. Internal is quick to update so its easy to manage.
- aurf
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