A few (too) simple questions about DNS records

Stephane Bortzmeyer bortzmeyer at nic.fr
Wed Sep 21 06:44:54 UTC 2011


On Wed, Sep 21, 2011 at 02:55:08AM +0200,
 Yanek <hostmaster at abetternet.net> wrote 
 a message of 42 lines which said:

> 1/ What is the bind record format for the zone itself?

Strictly speaking, it is not the BIND format but the standard format
(RFC 1035, section 5). However, not all name servers follow it
(standardizing the input file format is regarded as a bad idea, today)
and, anyway, it is underspecified so problems occur even when name
servers try to follow it.

> mydomain.tld.                                 IN      A       1.2.3.4
> 
> Am I wrong?

This line is correct.

> 2/ What is the bind format for a SPF record, eg:

Again, this is standard, not BIND-specific. RFC 4408:

3.1.1.  DNS Resource Record Types

   This document defines a new DNS RR of type SPF, code 99.  The format
   of this type is identical to the TXT RR [RFC1035]. 

> 3/ What is the bind format for a DKIM record, eg:

RFC 4871, section 3.6.2.



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