I have a nagios setup consisting of 2 distributed servers and one master using nsca. I'm having an issue where notifications aren't being sent for hosts going down or becoming unreachable but I see them in that state in the GUI and the logs. If a service check fails the notification is sent fine but if the whole box dies I'm never seeing a host down/unreachable alert. In fact there is no notification listed in the notification history so it seems to be a config issue. But I've looked through all of the configs multiple times and just can't figure this out. My host, service and contacts are defined with the following templates: define host{ name standard-host max_check_attempts 3 check_interval 15 retry_interval 5 check_command check-host-alive check_period 24x7 notifications_enabled 1 retain_status_information 1 retain_nonstatus_information 1 contacts ops notification_interval 15 notification_period 24x7 check_freshness 1 freshness_threshold 300 register 0 } define service{ name standard-service max_check_attempts 3 check_interval 5 retry_interval 3 check_period 24x7 notification_interval 10 notification_period 24x7 notification_options u,c,r contacts ops register 0 check_freshness 1 freshness_threshold 300 } define contact{ name standard-contact host_notifications_enabled 1 service_notifications_enabled 1 host_notification_period 24x7 service_notification_period 24x7 host_notification_options d,u,r service_notification_options c,u,r host_notification_commands host-notify-by-email service_notification_commands notify-by-email-verbose register 0 }