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. Download Nagios Core: http://nag.is/coresys Download Nagios XI: http://nag.is/xisys Download Nagios Plugins: http://nag.is/plugsys Website: https://www.nagios.com WATCH PART 2: https://youtu.be/wKXVz_9GDbM Thank you for watching!! Please let me know how you are using Nagios XI or Core in your environment. Please subscribe to get updates on new videos :) Twitter: sysadmgirl Facebook: sysadmgirl 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 wget https://sourceforge.net/projects/nagios/files/nagios-4.x/nagios-4.1.1/nagios-4.1.1.tar.gz wget http://www.nagios-plugins.org/download/nagios-plugins-2.1.1.tar.gz Extract the Nagios source code tarball. tar -xvzf nagios-4.1.1.tar.gz 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 vi /usr/local/nagios/etc/objects/contacts.cfg Change email address assoicated with install Nagios web config file make install-webconf nagiosadmin account for Nagios web interface htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin service httpd restart Install the Nagios Plugins tar xzf nagios-plugins-2.1.1.tar.gz 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. /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg 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 http://localhost/nagios/ iptables modify /etc/sysconfig/iptables to allow 80 & 443