This article shows how you can install the PHP WebDAV extension for PHP5 on a Debian Squeeze system. The PHP WebDAV extension allows easy access to remote resources through the DAV protocol from PHP scripts.

http://www.howtoforge.com/installing-the-php-webdav-extension-on-debian-squeeze

This tutorial explains how to use the GeoIP module with nginx to block visitors by country. This is made possible by the GeoIP database which maps users' IP addresses to countries. nginx must be compiled with the HttpGeoipModule to use the GeoIP database.

http://www.howtoforge.com/nginx-how-to-block-visitors-by-country-with-the-geoip-module-debian-ubuntu

Vsftpd is one of the most secure and fastest FTP servers for Linux. Usually vsftpd is configured to work with system users. This document describes how to install a vsftpd server that uses virtual users from a MySQL database instead of real system users. This is much more performant and allows to have thousands of ftp users on a single machine.

http://www.howtoforge.com/virtual-hosting-with-vsftpd-and-mysql-on-debian-squeeze

This guide explains how you can create advanced virtual hosts on a lighttpd web server on Debian Squeeze that are stored in a MySQL database. The method described here does not use the lighttpd mod_mysql_vhost module, and unlike mod_mysql_vhost (which allows you to store only the hostname and document root of a vhost in a database), this method allows to store individual configuration directives for each vhost in the MySQL database.