We run into a problem where customers Linux vm was sending a lot of unwanted messages. In order to troubleshoot this problem we did 2 things. Instructions below are for CentOS 6 and 7 but will also work on other distributions with minor configuration changes. Option 1
OSSEC is amazing tool and helps you be more secure by notifying you of any potential problems. However when it comes to monitoring web servers some additional configuration is necessary to get it working properly. In this quick write up we will look into making changes to default configuration when OSSEC running on web server.
In this how to we will be installing OSSEC Host based intrusion detection system on CentOS 7. We will be using clinet/server deployment which is recomended way to deploy OSSEC on the network where more then one system will be monitored.
In this article we will look into setting up very basic LAMP website. We will setup self signed ssl certificate and configure virtual host to run https. SSL is not bullet proof technology but it helps to make your website more secure by creating encrypted link between browser and web server.
SSH-Secure Shell was created to provide secure mechanism for data transfer between source and destination hosts on IP based network. SSH uses encryption techniques and digital signatures data checking to ensure security of data being transferred. OpenSSH is free and open source. It also supports additional features like tunnelling, TCP port forwarding and X11 forwarding.
In this how to we will look into resetting lost root password on CentOS 7. This will also work on RED HAT 7. We will need to boot into special shell in order to do this.