As it clarify with name that it is host based intrusion detention system we need to set it up in host/server which we want to monitor. Features File Integrity checking Log Monitoring Rootkit detection Active response Benefits Compliance Requirements - PCI and HIPAA Multi platform Real-time and Configurable Alerts Integration with current infrastructure Centralized management Agent and agentless m onitoring Configuration I did in Ubuntu so here are commands I used sudo apt get update -y sudo apt-get install apache2 -y sudo apt-get install build-essential -y sudo apt get update -y wget https://github.com/ossec/ossec-hids/archive/2.9.2.tar.gz sudo tar -zxvf 2.9.2.tar.gz cd ossec-hids-2.9.2/ sudo ./install.sh sudo /var/ossec/bin/ossec-control start cd /home/ubuntu wget https://github.com/ossec/ossec-wui/archive/master.zip sudo apt-get install unzip -y sudo unzip master.zip mv ossec-wui-master /var/www/html/ossec ...