.TH DLINT 1 "18 July 1998"
dlint \- Internet Domain Name System (DNS) error checking utility
DNS administrators can use
to scan recursively through the domain records of the fully-qualified
.IR zone ,
to get a report on any errors therein.
You can scan a zone you own, or anyone else's zone on the Internet.
talks directly to a primary or secondary nameserver for the zone,
to make sure it's working with up-to-date information.
also suggests ways of fixing problems instead of just complaining
about them like other debugging tools.
should always have an ending period to indicate it is a
fully qualified domain name.
recursively traverses the entire hierarchy below the zone specified.
option may be used to disable recursive traversal, causing it to
only examine the records in the given zone.
Note that a zone may or may not contain any number of sub-domains
(all of which will be checked with or without this option).
.B example% dlint nau.edu.
recursively scans the DNS records in zone nau.edu for problems.
.B example% dlint 64.114.134.in-addr.arpa.
recursively scans the DNS records associated with IP subnet 184.108.40.206 for problems.
You had to already know that 220.127.116.11 was subnetted.
The output from
is computer parsable, each line has a special meaning.
Lines beginning with a semicolon (;) are comments only.
Lines beginning with the phrase ``WARNING'' are useful information
that you should consider.
A warning is not necessarily an error,
but may be a problem.
Lines beginning with the phrase ``ERROR'' are definite errors
and should be dealt with accordingly.
.SH "EXIT STATUS"
Successful run, no problems encountered with zone.
Successful run, worst problem with zone was a WARNING.
Successful run, worst problem with zone was an ERROR.
A signal interrupted the program run
(i.e. user typed interrupt key sequence).
doesn't work behind some firewalls because it needs to talk to a
root nameserver to get started.
uses the zone transfer mechanism (AXFR) which some nameservers deny to
Other nameservers happily return zero records instead of an error,
in response to an unauthorized AXFR!
That is just wrong.
Paul Balyoz <email@example.com>
Copyright (C) 1993-1998 Paul A. Balyoz <firstname.lastname@example.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.