New warning message...
marka at isc.org
Mon Jul 22 05:01:47 UTC 2013
In message <BF47F557-DAC3-4B28-95BC-F1603722C665 at starionline.com>, SH Development writes:
> I just started noticing these in my log:
> 7/21/13 11:33:13 PM named 21-Jul-2013 23:33:13.646 general: warning: zone domain.com/IN: 'domain.com' found S
> PF/TXT record but no SPF/SPF record found, add matching type SPF record
> The zone does have an SPF record. I'm not sure I understand what else I'm supposed to be doing.
No. It has a legacy SPF TXT record. It SHOULD have record of
type SPF as per RFC 4408. Named will complain if both types
are not present.
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]. For either type,
the character content of the record is encoded as [US-ASCII].
It is recognized that the current practice (using a TXT record) is
not optimal, but it is necessary because there are a number of DNS
server and resolver implementations in common use that cannot handle
the new RR type. The two-record-type scheme provides a forward path
to the better solution of using an RR type reserved for this purpose.
An SPF-compliant domain name SHOULD have SPF records of both RR
types. A compliant domain name MUST have a record of at least one
type. If a domain has records of both types, they MUST have
identical content. For example, instead of publishing just one
record as in Section 3.1 above, it is better to publish:
example.com. IN TXT "v=spf1 +mx a:colo.example.com/28 -all"
example.com. IN SPF "v=spf1 +mx a:colo.example.com/28 -all"
Example RRs in this document are shown with the TXT record type;
however, they could be published with the SPF type or with both
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Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
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