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LibreNMS is an open source network monitoring/management system designed to track stats such as health and performance of network connected devices. This can include switches routers, servers and other networked hardware. It is a relatively well known tool which allows for features such as automatic device discovery, Customicable Alerts, Network Monitoring, and customizable dashboards. It uses CDP, FDP, LLDP, OSPF,BGP,SNMP, and ARP respectively. Its notifactions can be sent via email, irc, slack or through other platforms. If you would like to read more about its functionality click the link located here

Command Used	Explanation of Command
sudo yum update -y	This command updates all dependencies on Linux based devices/VM's/Et;all
sudo yum install epel-release -y	Installs the Extra Packages for Enterprise Linux [EPEL] Repository
sudo yum install dnf -y	Installs the Dandified YUM module used for more modern linux systems. Not fully neccessary
dnf –version	Checks the version number of DNF for cross comparison
sudo dnf update -y	Incase an older model was downloaded, this will check and install newer dependencies
dnf list installed	Lists all of the installed packages on your local machine
alias yum=dnf	creates an alias for the word yum to overide yum to use the dnf command
source ~/.bashrc	This command reloads the bash shell environment allowing for your device to properly reload the new dependencies
dnf -y install dnf-utils http://rpms.remirepo.net/enterprise/remi-release-8.rpm	downloads the dnf-utils package and the remi-release repository
dnf module reset php	removes any preconfigured settings for PHP. Used to remove Nagios Core settings
yum module enable php:remi-8.2	Sets the php download to look for version 8.2 when its installed
yum install -y php php-cli php-common php-opcache php-mcrypt php-gd php-curl php-mysql php-zip php-xml	Installs PHP and all of the other dependencies necessary
systemctl restart httpd	Restarts the MariaDB server if applicable
dnf install bash-completion cronie fping git ImageMagick mariadb-server mtr net-snmp net-snmp-utils nginx nmap php-fpm php-cli php-common php-curl php-gd php-gmp php-json php-mbstring php-process php-snmp php-xml php-zip php-mysqlnd python3 python3-PyMySQL python3-redis python3-memcached python3-pip python3-systemd rrdtool unzip	Downloads the following: Bash-Completion: Allows bash command autocompletion Cronie: Allows the scheduling of jobs to run periodically Fping: Faster efficient ping git: a tool for the distribution and management of source code. ImageMagick: Creates, edits, and converts Bitmap Images mariadb-server: DB-Server used for data organization mtr: a network diagnostic tool combing ping and traceroute net-snmp: SNMP manager net-snmp-utils: Tools used by net-snmp to manage SNMP packates nginx: High performance web server nmap: Network exploration and security auditing tool Et;all
sudo systemctl stop sssd	Stops the SSSD service
rm -rf /var/lib/sss/db/*	Removes all data logged at "/var/lib/sss/db/"
sudo systemctl enable sssd	Enables the SSSD Service
sudo systemctl restart sssd	Restarts the SSSD SErvice
useradd librenms -d /opt/librenms -M -r -s "$(which bash)"	Creates a new user named librenms with a specified home directory of /opt/librenms and set their shell to default as a bash script shell.
cd /opt	Go to the opt directory
git clone https://github.com/librenms/libernms.git	Clone the librenms.git file from github.com and save it to /opt
chown -R libernms:libernms /opt/librenms	Give the newly downloaded file full access from user/directory libernms
chmod 771 /opt/librenms	Give Librenms user & members Read Write Execute functionality
setfacl -d -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/	sets the default ACL group read write and execute permisions for all 3 directories specified
setfacl -R -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/	Same as above but recursively
Sudo yum install gcc python3-devel	Installs and downloads the python3-devel module
su - librenms ./scripts/composer_wrapper.php install --no-dev exit	Logs into the librenms user and run the composer_wrapper.php install script
wget https://getcomposer.org/composer-stable.phar mv composer-stable.phar /usr/bin/composer chmod +x /usr/bin/composer
timedatectl set-timezone America/New_York
vi /etc/my.cnf.d/mariadb-server.cnf	Append the following information innodb_file_per_table=1 lower_case_table_names=0
systemctl enable mariadb	Enables the Database Server
systemctl restart mariadb	Restarts the Database Server
mysql -u root
CREATE DATABASE librenms CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; CREATE USER 'librenms'@'localhost' IDENTIFIED BY 'password'; GRANT ALL PRIVILEGES ON librenms.* TO 'librenms'@'localhost'; exit	Create a database user and give them Privilege's to call and add data to the database. Change password to match your desired password
cp /etc/php-fpm.d/www.conf /etc/php-fpm.d/librenms.conf
vi /etc/php-fpm.d/librenms.conf	Change the following information: Change “www” to [librenms] Change "user" to [librenms] Change "group" = [librenms] listen = /run/php-fpm-librenms.sock
vi /etc/nginx/conf.d/librenms.conf	Confirm the following information in librenms.conf server { listen 80; server_name Librenms.east.local; root /opt/librenms/html; index index.php; charset utf-8; gzip on; gzip_types text/css application/javascript text/javascript application/x-javascript image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon; location / { try_files $uri $uri/ /index.php?$query_string; } location ~ [^/].php(/|$) { fastcgi_pass unix:/run/php-fpm-librenms.sock; fastcgi_split_path_info ^(.+.php)(/.+)$; include fastcgi.conf; } location ~ /.(?!well-known).* { deny all; } }
systemctl enable --now nginx	Enables NGINX as your web interface
systemctl enable --now php-fpm	Enables php-form
Sudo cp /opt/librenms/dist/librenms-scheduler.service /opt/librenms/dist/librenms-scheduler.timer /etc/systemd/system/	Copies the timer service and schedule for librenms in order to the have them manageable via systemd
Sudo systemctl enable librenms-scheduler.timer	Enables the timer
Open your NMOM01 server ip address in a web browser in order to complete the rest of your setup.

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Nagios Core is an open-source Linux-based network monitoring tool which monitors and checks the availability, performance, and applications used by the hosts connected to it. The main purpose being to alert the system administrator should an issue occur on a network host. In regards to OS compatibility, Nagios Core can run on both Linux systems as well as Unix-like Systems. When compared to other similar network monitoring tools Nagios meets the following criterium:

• IP SLA Reports [IP Service Level Agreement]: Nagios measures network service performance, Latency, Jitter, Packet Loss, et;alls when the proper plug in is installed. ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Logical Grouping: Logical Groupings, which allow for the segregation of hosts into user-defined groups, is natively available ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Trending: Trending, Which tells you what network data is most actively used over the network , is natively available ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Trend Prediction: Trend Prediction, Algorithmic prediction of future network statistics, is not available using Nagios Core ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Auto Discovery: Auto Discovery, Automatically locates network devices and hosts on the network, is available Via Plugins ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• SNMP compatibility: Nagios is able to Natively retrieve and report on SNMP statistics ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Syslog Compatibility: Nagios is able to receive and report on Syslog files with the appropriate Plugins. ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Triggers: Triggers alerting the administrator of various threshold violations in network data is Natively Available. ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• MIB compiler: MIB data can be Natively managed by NAGIOS core ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Web app: There is not a web based application available on Nagios core ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Distributed Monitoring: Distributed Monitoring is natively available and it Can be used on more than one server in order to increase monitoring capabilities ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Inventory: Nagios core natively keeps records on hardware/software inventories for the devices being monitored ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• Platform: The Platform was written in C ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• DATA storage method: Data is stored in either a FlatFile or SQL format ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• License: Nagios was released under the GNUGPL License ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).
• IPv6 Compatibility: Nagios Core Natively supports IPv6 monitoring of hosts ([Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems)).

Commandcd /tmp/nagios-plugins-2.1.1

System	Reasoning
Nmon > term	setenforce 0
Nmon > term	Cd /etc/selinux/config	Change “enforcing” to “disabled” to turn off SELinux
Nmon > term	yum install httpd php php-cli gcc glibc glibc-common gd gd-devel net-snmp openssl-devel wget unzip -y	This command installs the dependencies needed
Nmon > term	useradd nagios
Nmon > term	groupadd nagcmd
Nmon > term	usermod -a -G nagcmd nagios
Nmon > term	usermod -a -G nagcmd apache
Nmon01 > TMP	Wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.1.1.tar.gz
Nmon01 > TMP	Wget https://www.nagios-plugins.org/download/nagios-plugins-2.1.1.tar.gz
Nmon01 > TMP	tar zxf nagios-plugins-2.1.1.tar.gz
Nmon01 > TMP	Cd nagios-4.1.1
Nmon01 > nagios-4.1.1	./configure –with-command-group=nagcmd
Nmon01 > nagios-4.1.1	Sudo yum install make -y
Nmon01 > nagios-4.1.1	Make all
Nmon01 > nagios-4.1.1	Make install
Nmon01 > nagios-4.1.1	Make install-init
Nmon01 > nagios-4.1.1	Make install-commandmode
Nmon01 > nagios-4.1.1	Make install-webconf
Nmon01 > nagios-4.1.1	htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Nmon01 > nagios-4.1.1
Nmon01 > nagios-plug…	./configure –with-nagios-user=nagios –with-nagios-group=nagios –with-openssl
Nmon01 > nagios-plug…	make all
Nmon01 > nagios-plug…	make install
Nmon01 > nagios-plug…	/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Nmon01 > nagios-plug…	chkconfig –add-nagios
Nmon01 > nagios-plug…	chkconfig –level 35 nagios on
Nmon01 > nagios-plug…	firewall-cmd –zone=public –add-port=80/tcp –permanent
Nmon01 > nagios-plug…	firewall-cmd –reload
Nmon01 > nagios-plug…	vi /etc/httpd/conf/httpds.conf
Nmon01 > nagios-plug…	service http enable
Nmon01 > nagios-plug…	Service http start
Nmon01 > nagios-plug…	Service nagios enable
Nmon01 > nagios-plug…	Service nagios start
WKS01	Navigate to web browser “10.0.5.11/nagios”