Monitoring SMTP with Nagios

In this quick how to we will look at monitoring Publicly available SMTP servers with Nagios. We will be doing basic monitoring just to see weather server resopnds on port 25 within 10 seconds. We will be using plugin called check_smtp. Prerequisites: We already have Nagios up and running and will be monitoring two SMTP…

Adding Nagios plugin to NRPE check

In this example we will add check_ntp_time plugin to nrpe checks. We already have fully functioning NAGIOS monitoring server and client running NRPE. We are runnign CentOS 7 on both Nagios server and client.

Install Nagios NRPE from source code on CentOS or Debian

In order to monitor internal resources of remote systems with Nagios you will need NRPE installed and configured on a client. There will be two pieces to install NRPE daemon and nrpe plugins. This particular install was tested with CentOS and Debian.

Monitoring websites with NAGIOS and custom python script

Nagios is excellent monitoring tool and python is very powerful scripting language. Lets take a look how we can put this 2 together to create our own website monitoring plug-in. We will monitor basic public http response via python httplib module. In our example NAGIOS is installed on CentOS 7, procedure should be the same…