Security

linux

SELINUX

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, folders and ports has a special security label called SELinux…

Read More

spamassassin

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 filtering using¬†Spamassassin. The previous post in this series can be…



lock

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 of using AD aunthentication using realmd packages using the below…


lock

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, folders and ports has a special security label called SELinux…


lock

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. The process of recovering the root password in Redhat/CentOS 7…


lock

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. These permissions can be assigned to a user or group…



lock

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 require a password to view these restricted pages. Though there…


firewall

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 state-full firewall. Ipchains does not maintain state-full firewall The module…