Linux Security

Chrooted Drop Bear HowTo

This tutorial is being written to help you install Drop Bear to a chroot environment. Dropbear is a relatively small SSH 2 server and client. It is an alternative lightweight program for openssh and it is designed for environments with low memory and processor resources, such as embedded systems.

Chrooting Apache2 With mod_chroot On Fedora 12

This guide explains how to set up mod_chroot with Apache2 on a Fedora 12 system. With mod_chroot, you can run Apache2 in a secure chroot environment and make your server less vulnerable to break-in attempts that try to exploit vulnerabilities in Apache2 or your installed web applications.

Learning Spam With SpamAssassin And All Of Your ISPConfig Clients [ISPConfig 3]

This is a quick way of learning spam from all of your ISPConfig clients by running a quick and simple command. Please note that this is for ISPConfig 3, not 2.

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Mandriva 2010.0 x86_64)

This document describes how to install a Postfix mail server that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses. The resulting Postfix server is capable of SMTP-AUTH and TLS and quota. Passwords are stored in encrypted form in the database. In addition to that, this tutorial covers the installation of Amavisd, SpamAssassin and ClamAV so that emails will be scanned for spam and viruses. I will also show how to install SquirrelMail as a webmail interface so that users can read and send emails and change their passwords.