QWEST.NET can you fix your nameservers
marka at isc.org
Fri Sep 16 00:04:05 UTC 2016
In message <9442FCB1-E039-4EDD-8A0F-F5F351BC99B4 at truenet.com>, Eric Tykwinski w
> Ironically, I always wondered why I was told not to publish SPF records,
> since it did make more sense to have both, and slowly remove the TXT
> records later. Thanks for the heads upâ¦
> What do you think really is best practice now?
For SPF the decision was made to stay with TXT.
The IAB wrote RFC 5507 - Design Choices When Expanding the DNS.
As for testing there is:
There is general consensus that the tests are correct to the level
that they cover. There can always be more tests added. There is
less consensus on how we get from where we are now to where we need
The EDNS tests tool was the starting point for this draft.
> Eric Tykwinski
> TrueNet, Inc.
> P: 610-429-8300
> > On Sep 15, 2016, at 7:30 PM, Mark Andrews <marka at isc.org> wrote:
> > So your helpdesks don't get problem reports when people can't look
> > up domain names? Recursive DNS vendors don't get bug reports when
> > domain names can't be looked up. We don't get fixes developed
> > because there are too many broken servers out there.
> > Because some servers don't answer EDNS requests this leads to false
> > positives on servers not support EDNS when they do. This in turn
> > leads to DNSSEC validation failures as you don't get DNSSEC answers
> > without EDNS.
> > IPv6 deployment was put back years because AAAA DNS lookups got
> > wrong answers.
> > DANE deployment is slow because DNS servers give bad answers to
> > _<port>._tcp.<server-name>/TLSA.
> > Then there is SPF. A fare portion of the reason why the SPF record
> > failed, despite it being architectually cleaner than using TXT
> > records, is that some nameservers gave bad responses to SPF queries.
> > I could go find more examples of the cost of non DNS protocol
> > compliance.
> > --
> > Mark Andrews, ISC
> > 1 Seymour St., Dundas Valley, NSW 2117, Australia
> > PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
More information about the NANOG