The check_ping Nagios plugin does not ping hostnames, only IP addresses.<div> </div><div>-Travis <div class="gmail_quote">On Wed, Jun 6, 2012 at 11:54 PM, Cosmin Neagu <<a href="mailto:cosmin.neagu@omnilogic.ro" target="_blank">cosmin.neagu@omnilogic.ro</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi nagios users, Starting from yesterday, check_ping is behaving strange for a single host. When giving -H parameter as <a href="http://www.google.ro" target="_blank">www.google.ro</a> it gives CRITICAL - Network Unreachable But when giving -H parameter as IP address it is working. I have checked and there are no DNS issues nagios@mon2:/usr/local/nagios/libexec$ ./check_ping -H <a href="tel:173.194.35.159" value="+17319435159">173.194.35.159</a> -w 3000.0,80% -c 5000.0,100% PING OK - Packet loss = 0%, RTA = 46.97 ms|rta=46.971001ms;3000.000000;5000.000000;0.000000 pl=0%;80;100;0 nagios@mon2:/usr/local/nagios/libexec$ ./check_ping -H <a href="http://www.google.ro" target="_blank">www.google.ro</a> -w 3000.0,80% -c 5000.0,100% CRITICAL - Network Unreachable (<a href="http://www.google.ro" target="_blank">www.google.ro</a>) nagios@mon2:/usr/local/nagios/libexec$ ping <a href="http://www.google.ro" target="_blank">www.google.ro</a> PING <a href="http://www-cctld.l.google.com" target="_blank">www-cctld.l.google.com</a> <a href="tel:%28173.194.35.159" value="+17319435159">(173.194.35.159</a>) 56(84) bytes of data. 64 bytes from <a href="http://muc03s01-in-f31.1e100.net" target="_blank">muc03s01-in-f31.1e100.net</a> <a href="tel:%28173.194.35.159" value="+17319435159">(173.194.35.159</a>): icmp_seq=1 ttl=54 time=46.8 ms 64 bytes from <a href="http://muc03s01-in-f31.1e100.net" target="_blank">muc03s01-in-f31.1e100.net</a> <a href="tel:%28173.194.35.159" value="+17319435159">(173.194.35.159</a>): icmp_seq=2 ttl=54 time=46.8 ms Using nagios 3.2.3 nagios@mon2:/usr/local/nagios/libexec$ ./check_ping -h check_ping v1.4.15 (nagios-plugins 1.4.15) Copyright (c) 1999 Ethan Galstad <<a href="mailto:nagios@nagios.org">nagios@nagios.org</a>> After a little more search Other sites works ok when used with check_ping, but not site containing goole is working nagios@mon2:/usr/local/nagios/libexec$ ./check_ping -H <a href="http://www.google.de" target="_blank">www.google.de</a> -w 3000.0,80% -c 5000.0,100% CRITICAL - Network Unreachable (<a href="http://www.google.de" target="_blank">www.google.de</a>) nagios@mon2:/usr/local/nagios/libexec$ ./check_ping -H <a href="http://www.google.com" target="_blank">www.google.com</a> -w 3000.0,80% -c 5000.0,100% CRITICAL - Network Unreachable (<a href="http://www.google.com" target="_blank">www.google.com</a>) nagios@mon2:/usr/local/nagios/libexec$ ./check_ping -H <a href="http://www.google.it" target="_blank">www.google.it</a> -w 3000.0,80% -c 5000.0,100% CRITICAL - Network Unreachable (<a href="http://www.google.it" target="_blank">www.google.it</a>) Any idea why? -- Cosmin Neagu NOC Team Leader Str. I. G. Duca nr. 36 Otopeni, Judetul Ilfov, 075100 Romania <a href="http://www.omnilogic.ro" target="_blank">www.omnilogic.ro</a> ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. <a href="http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/" target="_blank">http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/</a> _______________________________________________ Nagios-users mailing list <a href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </blockquote></div> </div>