Nagios Core Part 1: Server (CentOS) and Client (Linux & Windows) Setup Tutorial

A tutorial on how to configure Nagios Core server and clients (Linux and Windows). Nagios Core is a monitoring and alerting software package that notify system administrators of any system or server issues.

Thank you for watching!! Please let me know how you are using Nagios XI or Core in your environment.

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Prerequisites
yum install httpd php gcc glibc glibc-common gd gd-devel

Accounts:
/usr/sbin/useradd -m nagios
passwd nagios
/usr/sbin/groupadd nagcmd # Used for Web Interface
/usr/sbin/usermod -a -G nagcmd nagios
/usr/sbin/usermod -a -G nagcmd apache

Download source code

Extract the Nagios source code tarball.
cd nagios-4.1.1

Run the Nagios configure and compile source code
./configure --with-command-group=nagcmd
make all
make install
make install-init
make install-config
make install-commandmode

Change email address assoicated with install

Nagios web config file

make install-webconf

nagiosadmin account for Nagios web interface

service httpd restart

Install the Nagios Plugins
cd nagios-plugins-2.1.1

./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install

Add Nagios services
chkconfig --add nagios
chkconfig nagios on

Verify the sample Nagios configuration files.
service nagios start

Check SELinux
getenforce

Change to permissive mode.
setenforce 0

Modifiy /etc/selinux/config for system to remain in permission mode

OR modifiy selinux permissions to allow nagios

chcon -R -t httpd_sys_content_t /usr/local/nagios/sbin/
chcon -R -t httpd_sys_content_t /usr/local/nagios/share/

Log into Nagios web interface
username: nagiosadmin
password: set with htpasswd util

iptables
modify /etc/sysconfig/iptables to allow 80 & 443

[johnredfield]

Straight up one of the best tutorials I've seen in the networking space. Not only did you walk us through the process but you dropped little gems of knowledge along the way. Thank you so much!!!!

[KTypeR]

Great video - thanks for the in depth but easy guide.

[Bladerunner]

Lovely to see you are back seems ages since the last video i was having withdrawal symptoms have a great one

[warron.french_food]

Good for you to support the concept of SELinux and aiding others with keeping it enabled, so that those folks can maintain a strong security posture. Good work!

[loknath]

Nice topic. It is very useful and helpful to me thank you

[bobanthony]

Thank you so much for this video. Straight forward and really helpful

[SarfarazAhmad]

hey. good to see that you are back! also look at icinga2. its opensource and amazing. it provides inbuilt HA and all the devops stuff as well !

[damara]

Thank you very much SysAdmGirl, this video is very intuitive.

[sk]

Nice to have you back! can you make a review for PandoraFMS is really interesting monitoring system

[venkatchari]

Excellent Video on installing Nagios Core Monitoring Server

[solacas]

Great video! Thank you and keep up the good work.

[circuitman]

Thanks for the video I will be sure to check it out nice to see a video from you (2 I guess) anyway thanks again.

[mohdazlan-mdby]

Thank you for giving us wonderful lectures. I really love the way you teach us.
You have taught us almost everything related to nagios. Can you please explain nagios master slave setup and how to configure that. Or if there is any article than please share that.
Thanks in Advance

[iogarchi]

I do like the way you explain, very precise and clear. Thanks, Miss. By the way, beautiful eyes.

[stanleemoks]

Wooooh gatta KLAP for that. GOOD Detailing on such a video tut. THANKS.

[fl]

Happy to see u back! Can u exhibit how to install kali

[leeleethefrenchie]

Just found this thread. You might be my hero (from one sysadingirl to another)

[migueljimenez]

Nice, I will try to install it, but right now I'm using OpenManage, thanks for this video.

[BishishtBhatta]

nice one. thanks for making this video. can you give us a tour of your homelab??

[romeonagha]

Well done !!! this girl is bad. She very knowledgeable. Thanks