Your should look at the log before the service notification was suppressed because the host was down. I'm 90% sure the reason why your host down notification was not sent was because the host was in a soft state type and came back online before it was determined to be in a hard state. And you didn't post your linux-server template config so you will have to check your and retry_interval definition. For my host objects I set a retry_interval of 1 and max_check_attemps of 2 in the template so I get notified a little quicker when a host goes down.<div> </div><div><a href="http://nagios.sourceforge.net/docs/3_0/objectdefinitions.html">http://nagios.sourceforge.net/docs/3_0/objectdefinitions.html</a> </div> <div> </div><div>-Travis Runyard <div class="gmail_quote">On Tue, Aug 28, 2012 at 4:39 PM, Net Warrior <<a href="mailto:netwarrior863@gmail.com" target="_blank">netwarrior863@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi there guys. I have face something weird, I did not get a notificationn of a down state for a particular host, this is the host config. define service{ use local-service ; Name of service template to use host_name hostname service_description SSH check_command check_ssh flap_detection_enabled 0 notifications_enabled 1 notification_options w,u,r,c check_period 24x7 check_interval 1 max_check_attempts 3 first_notification_delay 0 notification_interval 10 } define host{ use linux-server ; Name of host template to use ; This host definition will inherit all variables that are defined ; in (or inherited by) the linux-server host template definition. host_name hostname alias the alias address x.x.x.x contact_groups admins contacts nagiosadmin check_interval 1 max_check_attempts 3 notification_interval 10 flap_detection_enabled 0 first_notification_delay 0 } and in the logs I got [1346196987.097821] [032.0] [pid=21145] ** Service Notification Attempt ** Host: 'hostname', Service: 'SSH', Type: 0, Options: 0, Current State: 2, Last Notification: Wed Dec 31 21:00:00 1969 [1346196987.097843] [032.1] [pid=21145] The host is either down or unreachable, so we won't notify contacts about this service. [1346196987.097851] [032.0] [pid=21145] Notification viability test failed. No notification will be sent out. The host is either down or unreachable --- Of coure, so why the notification was not fired? Any idea what could be wrong?, I got some notification with other host and all have the same configuration, I have already restarted nagios Thanks for your time and support Best regards. ------------------------------------------------------------------------------ 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>