[dns-operations] Upcoming DNS behavior changes to .com/.net/.edu name servers

Phil Pennock dnsop+phil at spodhuis.org
Thu Mar 4 19:54:34 UTC 2010

On 2010-03-04 at 12:58 -0600, Chris Adams wrote:
> Once upon a time, Phil Pennock <dnsop+phil at spodhuis.org> said:
> > On 2010-03-04 at 11:07 -0600, Ken A wrote:
> > > Is there another recommended way to query the roots for a NS record, 
> > > bypassing local DNS?
> > 
> > dig +norec +answer +authority -t ns ZONE @SERVER ?
> Rather than query a particular server (which means you have to remember
> which servers are authoritative for which TLDs) when looking for an
> authoritative answer, you could use +trace (always starts at the root
> servers and follows delegations from there):
> dig +trace +short -t ns ZONE

This now jumps directly from . to example.org. because the intermediates
no longer return NS in answer sections so +short is omitting the data.

So no matter whether you trace manually or with +trace, you come back to
needing { +noall +answer +authority } instead of { +short } and dealing
with the different output format.


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