marka at isc.org
Tue May 30 21:44:59 UTC 2017
In message <36A87DF2-C03D-48B0-8686-5D9CAA3286FD at buxtonfamily.us>, Chris Buxton
> Thanks for the response, Tony. Responses in-line.
> On May 30, 2017, at 5:51 AM, Tony Finch <dot at dotat.at> wrote:
> > Chris Buxton <clists at buxtonfamily.us> wrote:
> >> dns_master_load: example.com.dns:6785: bad escape
> >> dns_master_load: example.com.dns:6789: bad escape
> >> mhtswfw-dellfi01\342\200\223mgmt A 10.152.224.231
> >> mhtswfw-dellfi02\342\200\223mgmt A 10.152.224.232
> > Snigger. That's an en dash (U+2013, UTF-8 E2 80 93) encoded as
> > octal escapes. Master file binary escapes are decimal :-)
> > (Extra irony that Mockapetris was working on a PDP-10 which
> > loved octal.)
> That's amazing. The escapes come from Microsoft DNS, of course, so
> this seems like a bug in Microsoft's implementation.
> >> There are NS records pointing to these names. The names belong to the
> >> zone I'm trying to compile. But the names are not defined. I would have
> >> expected that '-i none' would have allowed it to skip these errors. but
> >> it doesn't.
> > Yes, BIND insists very strongly that name servers have addresses.
> But it didn't used to do so. This seems like a bug to me, even if it
> is working as designed. The design is faulty. Any comment from ISC?
The '-i none' is for the delegating NS records.
> The purpose of this workflow is to standardize how data from Microsoft DNS
> exports are migrated into a BIND server. This problem is making the job
Well Microsoft's servers don't check for lots of stupid content
which ends up here as "why does this lookup fail". If a "server"
has no address records then it isn't a server so why is it listed
in the NS records for the zone? Almost all of the time there are
no records at all so the glue A records get wiped out by the NXDOMAIN
response to the AAAA lookup and you have a zone that is not resolvable.
They also don't check for CNAME and other data.
> Chris Buxton
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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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