Security
Configuring TLS in Postfix
This post is a continuation on previous posts. It is expected that you have a working Postfix server with Virtual Domain hosting, Dovecot based authentication and […]
SSL certificate: How to create a self signed SSL certificate using a Linux server
What is an SSL certificate? An SSL Certificate (A Secure Sockets Layer certificate) is also called as a Digital Certificate. Using this certificate we can […]
Adding a CentOS 7 host to AD using realmd
A CentOS host can be added to an AD for suthentication using samba-winbind or realmd packages. In this tutorial we will learn the simple way […]
SELinux Security
SELinux is a set of security rules using which we can control the processes that can access specific files, folders and ports. These processes, files, […]
Recover a Redhat 7 or CentOS 7 root password
There can be instances where you would had lost your root user’s passwords and thus cannot perform certain activities allowed only to the root user. […]
Basic ACLs in Linux
ACL – Access Control List is a wonderful feature in linux that enables system administrators to add additional permissions on a linux folder or file. […]
Configuring CentOS 7 linux host to function as a router
Linux has the provision to work as a router connecting two networks. In this example we have two NICs in the host. ]# ifconfig …… […]
Enabling security using .htaccess file
When working with web servers, and displaying contents, you may wish to restrict access to certain pages to only authenticated users. Which means one will […]
Linux iptables as a Router
Netfilter : The actual filtering in a Linux box is done using Netfilter. Iptables : is the tool used to create this filters. Iptables maintain […]