The host shows as down because the check_command for the host is CRITICAL. Given the performance info you pasted, this makes sense, since the check_command looks like a normal check_ping and you seem to have 80% packet loss from your Nagios host to <a href="http://70.62.24.79/" target="_blank">70.62.24.79</a> If you'd like the host to show as up, set the check_command variable of the host definition to something that is successful. If you don't care about the host itself, just the services on the host, maybe you can use something like check_dummy? Anyway Mathias Kettner is correct since Nagios will show your host as down if the host's check_command fails - and you apparently don't have check_mk as the host's check command. Regards Martin Melin <div class="gmail_quote">On Wed, Oct 14, 2009 at 1:30 PM, Joe Konecny <<a href="mailto:jkonecny@rmtohio.com">jkonecny@rmtohio.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I configured a host with check_mk and it is monitoring 13 services. All of the 13 services are OK. The host shows as down however and I can find no reason for it. I spoke with Mathias Kettner author of check_mk and he claims that it is not check_mk that is the problem. I configured a host in Nagios (without check_mk) and it works fine. I don't understand what is wrong or where to look for the problem. Any tips. *********** Here is the Nagios host... Host Status: UP (for 0d 0h 1m 5s) Status Information: PING OK - Packet loss = 0%, RTA = 0.41 ms Performance Data: Current Attempt: 1/10 (HARD state) Last Check Time: 10-14-2009 07:22:38 Check Type: ACTIVE Check Latency / Duration: 0.015 / 4.012 seconds Next Scheduled Active Check: 10-14-2009 07:27:46 Last State Change: 10-14-2009 07:25:23 Last Notification: N/A (notification 0) Is This Host Flapping? NO (0.00% state change) In Scheduled Downtime? NO Last Update: 10-14-2009 07:26:26 ( 0d 0h 0m 2s ago) *********** Here is the check_mk host... Host Status: DOWN (for 0d 5h 2m 10s) Status Information: CRITICAL - <a href="http://70.62.24.79" target="_blank">70.62.24.79</a>: rta 0.970ms, lost 80% Performance Data: rta=0.970ms;200.000;500.000;0; pl=80%;40;80;; Current Attempt: 1/1 (HARD state) Last Check Time: 10-14-2009 07:19:28 Check Type: ACTIVE Check Latency / Duration: 0.000 / 3.568 seconds Next Scheduled Active Check: 10-14-2009 07:20:28 Last State Change: 10-14-2009 02:17:37 Last Notification: N/A (notification 0) Is This Host Flapping? NO (0.00% state change) In Scheduled Downtime? NO Last Update: 10-14-2009 07:19:38 ( 0d 0h 0m 9s ago) *********** Here are the check_mk services... 70.62.24.79 Perform Extra Host Actions CPU utilization Active checks of the service have been disabled - only passive checks are being accepted Perform Extra Service Actions OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - user: 0%, system: 0%, wait: 0% Check_MK OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - Agent Version 1.0.38, processed 12 host infos Disk IO read Active checks of the service have been disabled - only passive checks are being accepted Perform Extra Service Actions OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - 0.0MB/s (in last 60 secs) Disk IO write Active checks of the service have been disabled - only passive checks are being accepted Perform Extra Service Actions OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - 0.0MB/s (in last 60 secs) Memory used Active checks of the service have been disabled - only passive checks are being accepted Perform Extra Service Actions OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - 11.1% of RAM (112 MB) used by processes NIC eth0 counters Active checks of the service have been disabled - only passive checks are being accepted Perform Extra Service Actions OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - Receive: 0.00 MB/sec - Send: 0.00 MB/sec NIC eth0 link Active checks of the service have been disabled - only passive checks are being accepted OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - Link is up NIC eth0 parameter Active checks of the service have been disabled - only passive checks are being accepted OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - 100Mb/s,Full,on NIC eth1 counters Active checks of the service have been disabled - only passive checks are being accepted Perform Extra Service Actions OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - Receive: 0.00 MB/sec - Send: 0.00 MB/sec NIC eth1 link Active checks of the service have been disabled - only passive checks are being accepted OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - no link / NIC unused NIC eth1 parameter Active checks of the service have been disabled - only passive checks are being accepted OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - 10Mb/s,Half,on fs_/ Active checks of the service have been disabled - only passive checks are being accepted Perform Extra Service Actions OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - 11.5% used (3.6 of 31.5 GB), (levels at 80.0/90.0%) fs_/boot Active checks of the service have been disabled - only passive checks are being accepted Perform Extra Service Actions OK 10-14-2009 07:18:22 0d 21h 9m 45s 1/1 OK - 25.2% used (0.0 of 0.1 GB), (levels at 80.0/90.0%) ------------------------------------------------------------------------------ Come build with us! 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