Nagios Server/Router Monitoring

This Nagios NSCA mini-course will provide you with the information you need so set up a Nagios server that receives passive communication from other servers and it will demonstrate how to set up a clients to send passive checks to the Nagios central server.

Course Difficulty
The course level is for an Experienced Nagios Administrator.  One of [...]

Nagios Lab Manual
The Nagios Basic Setup provides you with a concise manual that includes 10 Labs to help you set up and begin monitoring with Nagios. The manual is designed to provide concise step-by-step instruction that will help you start monitoring servers, desktops, printers, routers and switches. The information contained in the manual is designed [...]

Testing Connections
The first thing to do when testing connections is to go to the target server and run a command to verify that it works.  Here is an example of a command that is found in the /etc/nagios/nagios.cfg file.
# /usr/lib/nagios/plugins/./check_users -w 5 -c 10
USERS WARNING – 5 users currently logged in |users=5;5;10;0
You can see that [...]

Review File Locations
There are a number of files that you should review, both their location and their content.  It is important that you review these because if you change a file location you may have to modify a number of additional files that depend on that location.
Main Configuration File
The main configuration file for nagios is [...]

Nagios is a free, open-source tool that can be used to monitor network components and services.  When it detects a problem, it can send alert messages by either email or pager.  It can also be configured so that only designated personnel can view status information for particular services or equipment.
Nagios isn’t in the official Red [...]

Nagios allows you to monitor network printers so that you will easily be able to verify basic information about your network printers. This will allow you to check if the printer is up and basic toner states.  It will not provide a whole lot of information but if you want more you can always [...]