Varad Gupta
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The Nagios Setup Explained

In this article, we shall discuss Nagios, an open source software that is deployed in most data centres to monitor various system and network parameters. The practice of appointing prefects is a time-honoured…

Understanding the OpenLDAP schema

OpenLDAP, Part 3: Understanding the LDAP Schema

In this article, we will explore LDAP concepts such as schema, ObjectClasses and attributes — these will help us build an LDAP server capable of authenticating Linux users. To understand ACLs and LDAP…

OpenLDAP security

OpenLDAP, Part 2: Adding Basic Security Measures

In the second part of the series on OpenLDAP, we’ll cover rootdn password encryption with slappasswd, understand slapd.conf file structure, disable anonymous directory reads, and ACLs (access controls). In Part 1, we had…

Getting started with OpenLDAP

OpenLDAP, Part 1: Setting Up the Directory Server

Let us begin this series on LDAP by setting up OpenLDAP on our machines and unravelling its mysteries as the series progresses. OpenLDAP is the open source implementation of the LDAP protocol to…

The Art of Guard, Part 5: SELinux Logging

In the previous article in this series, we looked at allow rules in an SELinux policy. This month we’ll discuss SELinux error logs in order to decipher them and take corrective action.

The Art of Guard, Part 2: SELinux Modes and Policies

Let’s explore SELinux modes, and learn a few commands that will help in understanding SELinux policies better.

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