gentoo

Great tutorial on how to set up and configure multiple machines to watch a UPS and shutdown when the battery is low. Nut is a fantastic project with plenty of UPS driver support.

This tutorial shows how to set up a Gentoo 2007.0 based server that offers all services needed by ISPs and hosters: Apache web server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Courier POP3/IMAP, Quota, Firewall, etc. This tutorial is written for the x86 version of Gentoo 2007.0, but should apply to other architectures with very little modification.

Fail2ban has been successfully used to protect SSH daemons, but this article talks about how you can use fail2ban to lessen the load of mailservers by blocking previously identified blacklisted IPs or relay access abuse. Howto is was written for Gentoo, but should easily be applied to any Linux distro.

Complete how to for upgrading mod_security-1.x to 2.x. Also discusses some of the issues related to that upgrade and offers migration matrix link to easily rework existing rules.

Simple how-to for installing and configuring policyd-weight policy daemon. Policyd-weight sits inline with Postfix and can reject mails before the data transaction. This is great for quickly IDing spammers and rejecting them before soaking up bandwidth and processing via spamassassin. How-to is geared towards Gentoo Linux, but can be easily applied to others.

This article is about getting saslauthd working in a chroot'd postfix. Due to jail constraints in Postfix, saslauthd socket and PID needs to be available in there.. this explains how. Gentoo specific, but could be applied with any linux system.

How to configure grub to reboot into a fallback kernel after kernel panic.

How-to configure Snort with SnortSam to be a real time Instrusion Prevention System

Documents the process of upgrading MySQL from 4.1.21 to 5.0.26. This Gentoo Linux specific.