I need to monitor windows services(like CPU load, memory usage etc.), so I have installed Nagios monitoring tool. The installation is complete and ‘check_nt’ plugin is also installed. Upto this no error is there, but while executing scripts with agent NSClient++ ‘Connection refused by host’ error still persists.
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./check_nt -H 10.112.32.78 -p 1248 -v MEMUSE -w 80 -c 90 Connection refused by host./check_nt -H 10.112.32.78 -p 1248 -v MEMUSE -w 80 -c 90 Socket timeout after 10 secondsI have verified that nagios is working correctly, as under.
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/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfgNagios Core 3.4.1Copyright (c) 2009-2011 Nagios Core Development Team and Community ContributorsCopyright (c) 1999-2009 Ethan GalstadLast Modified: 05-11-2012License: GPLWebsite: http://www.nagios.orgReading configuration data Read main config file okayProcessing object config file '/usr/local/nagios/etc/objects/commands.cfg'Processing object config file '/usr/local/nagios/etc/objects/contacts.cfg'Processing object config file '/usr/local/nagios/etc/objects/timeperiods.cfg'Processing object config file '/usr/local/nagios/etc/objects/templates.cfg'Processing object config file '/usr/local/nagios/etc/objects/localhost.cfg' Read object config files okayRunning pre-flight check on configuration dataChecking services Checked 8 services.Checking hosts Checked 1 hosts.Checking host groups Checked 1 host groups.Checking service groups Checked 0 service groups.Checking contacts Checked 1 contacts.Checking contact groups Checked 1 contact groups.Checking service escalations Checked 0 service escalations.Checking service dependencies Checked 0 service dependencies.Checking host escalations Checked 0 host escalations.Checking host dependencies Checked 0 host dependencies.Checking commands Checked 24 commands.Checking time periods Checked 5 time periods.Checking for circular paths between hostsChecking for circular host and service dependenciesChecking global event handlersChecking obsessive compulsive processor commandsChecking misc settingsTotal Warnings: 0Total Errors: 0Things look okay - No serious problems were detected during the pre-flight checkM new to nagios, thanks in advance 🙂
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Answer
The connection is getting blocked either by a firewall or your Nagios server is not in the nsc.ini file in the “allowed hosts” field. Make sure that port is open on your windows firewall, as well as any other net filters in between your Nagios server and your client.