My company decided to use Nagios XI instead of Nagios Core. Nagios Core is open source and can be used for free. Nagios XI is not a free tool, which means you have to pay for the license. And the price is determined by the hosts/nodes you intend to monitor. The Nagios XI is actually … Continue reading Nagios XI: Introduction →

1) Install prerequisites.yum install -y net-snmp net-snmp-utils 2) Check to see whether ‘check_snmp’ and ‘check_mrtgtraf’ can be found under /usr/local/nagios/libexec/ folder. If not,  you need to reinstall the nagios-plugin.  (It can be found in my previous post on the Nagios Installation) 3) As the ‘check_mrtgtraf’ will retrieve the bandwidth utilization information from MRTG log, the … Continue reading Nagios: Monitoring Router/Switch →

* Install the NSClient++ on remote Windows server 1) Download the NSClient++ from its offical download page. Make sure you use the right version for the server processor 32bit/ 64bit. In this sample, I use NSClient++-0.3.8-Win32.zip. 2) Unzip NSClient++-0.3.8-Win32.zip to C:\nsclient++. 3) Open a command prompt and change the path to C:\nsclient++, then run ‘NSclient++.exe … Continue reading Nagios: Monitoring Windows →

In this sample, Nagios monitors remote Linux host via the plugin named ‘check_nrpe’. And the NRPE package needs to be installed on the remote Linux host, as it works as the Nagios Linux agent. * The following configurations need to be done on the remote Linux/Unix host: 1) Install prerequisite packages. yum install -y gcc … Continue reading Nagios: Monitoring Linux →