The help for the plugin says -
./check_dns --help
check_dns v1.4.15 (nagios-plugins 1.4.15)
Copyright (c) 1999 Ethan Galstad <nag...@nagios.org>
Copyright (c) 2000-2008 Nagios Plugin Development Team
<nagiosplug-de...@lists.sourceforge.net>
This plugin uses the nslookup program to obtain the IP address for the given
host/domain query.
An optional DNS server to use may be specified.
If no DNS server is specified, the default server(s) specified in
/etc/resolv.conf will be used.
(Based on your stated result(s), I must assume that if the "specified server"
fails, it probably defaults to /etc/resolv.conf, but I'd probably have to fire
up wireshark/tshark to find out for sure)...
Cheers,
James
From: Nibin V M [mailto:nibin...@piserve.com]
Sent: Monday, July 18, 2011 10:55 AM
To: Nagios Users List
Subject: [Nagios-users] DNS check - please help
Hello,
I am a bit lost to find how the check_dns works. Please see the results below.
# ./check_dns -H google.com<http://google.com> --server=myserver.
DNS OK: 0.011 seconds response time. google.com<http://google.com> returns
74.125.93.103,74.125.93.104,74.125.93.105,74.125.93.106,74.125.93.147,74.125.93.99|time=0.011378s;;;0.000000
# dig +short google.com<http://google.com> @myserver
#
I am sure that recursion isn't enabled on "myserver". Do the plugin try to
resolve google.com<http://google.com> using the name servers specified
resolv.conf, if the -s server doesn't provide any answer?
Thanks in advance.
Regards,
Nibin.
---------------------------------
Nibin.V.M
Systems Integrator
PiServe.com
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