epza.gov.tw. MX

[Mark Andrews]

DNS at TWNIC.NET.TW:  Please contact the adminitrators of EPZA.GOV.TW and have
them fix this.

In message <6BB5C370-F375-424F-891C-D9FCF9D0FA17 at yahoo-inc.com>, "Mark K. Petti
t" writes:
> On Aug 8, 2011, at 1:50 PM, Chris Thompson wrote:
> 
> > On Aug 8 2011, Mark K. Pettit wrote:
> > 
> >> My resolvers, running BIND 9.7.3P3, are having a difficult time resolving
> >> the MX record for the zone "epza.gov.tw.".
> >> 
> > [...]
> >> 
> >> Any idea why this might be happening?
> > 
> > The delegation for epza.gov.tw from the gov.tw zone specifies a single
> > nameserver dns.epza.gov.tw (with glue 163.29.43.1). But the server there
> > thinks that the nameserver for the zone is called ns.epza.gov.tw, and
> > that dns.epza.gov.tw is a CNAME with target ns.epza.gov.tw.
> > 
> > Using CNAMEs like that doesn't work correctly. Making dns.epza.gov.tw
> > have a duplicate address record instead would work, but of course what
> > is really needed is to get the delegation in step with the zone itself.
> > 
> > Having more than one nameserver for the zone wouldn't be a bad idea,
> > either ...
> 
> Thanks, this explained everything we've been seeing.
> 
> Fortunately, it's not our fault, so we can punt.  :)

Well you can add a forward zone as a temporary workaround.

zone epza.gov.tw {
	type forward;
	forwarders { 163.29.43.1 };
};
 
or a static stub zone.

This is something that should be caught by the parent zone's administators
on their regular checks of the delegations.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org