Installing PEAR framework and packages
PEAR is a framework and distribution system for reusable PHP components. 1. Install the PEAR framework get install php-pear
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Configuring goldfish autoresponder for Postfix
goldfish is a quite simple autoresponder for Postfix in conjunction with MySQL, written in PHP. It consists of only one PHP file which can be started through a cronjob. In this tutorial, it’s assumed that you have already installed Postfix with MySql backend using this tutorial: Installing Postfix with MySql backend and SASL for [...]
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Replacing OpenSSH server with dropbear
dropbear is a SSH 2 server and client designed to be small enough to be used in small memory environments, while still being functional and secure enough for general use. It implements most required features of the SSH 2 protocol, and other features such as X11 and authentication agent forwarding. 1. Install dropbear apt-get install [...]
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Prevent brute force attacks using fail2ban
fail2ban monitors log files such as /var/log/auth.log and /var/log/apache/access.log and temporarily or persistently bans failure-prone addresses by updating existing firewall rules. Currently, by default, fail2ban supports ssh/apache/vsftpd but configuration can be easily extended for monitoring any other ASCII file. 1. Install fail2ban [...]
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Setup DomainKeys Identified Mail (DKIM) in Postfix
DomainKeys Identified Mail (DKIM) is a method for email authentication that allows an organization to take responsibility for a message it has sent in a way that can be validated by a recipient. The technique is based on public-key cryptography: Responsibility is claimed by the signer by adding a digital signature to a message’s [...]
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Tuning MySql with MySqlTuner to increase efficiency and performance
mysqltuner is a high-performance MySQL tuning script written in perl that will provide you with a snapshot of a MySQL server’s health. Based on the statistics gathered, specific recommendations will be provided that will increase a MySQL server’s efficiency and performance. 1. Install MySqlTuner apt-get install mysqltuner
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Installing PowerDNS Recursor
PowerDNS Recursor is a resolving DNS server, that runs as a separate process. The authoritative pdns_server can be configured to proxy recursive queries to the recursor, and optionally overlay authoritative zone data. The Recursor is used by several of the largest Internet providers of the world, including AOL, Shaw Cable and Neuf [...]
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Installing HAVP (HTTP Antivirus Proxy)
HAVP (HTTP Antivirus Proxy) is a proxy with a ClamAV anti-virus scanner. The main aims are continuous, non-blocking downloads and smooth scanning of dynamic and password protected HTTP traffic. Havp antivirus proxy has a parent and transparent proxy mode. It can be used with squid or standalone. 1. Install HAVP apt-get install havp
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Configuring port forwarding with rinetd
inetd redirects TCP connections from one IP address and port to another. rinetd is a single-process server which handles any number of connections to the address/port pairs specified in the file /etc/rinetd.conf. Since rinetd runs as a single process using nonblocking I/O, it is able to redirect a large number of connections without a [...]
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OpenID authentication with the mod_auth_openid Apache module
mod_auth_openid is an authentication module for the Apache 2 webserver. It handles the functions of an OpenID consumer as specified in the OpenID 2.0 specification. After a user authenticates themselves, the user’s identity will be available in the REMOTE_USER variable. A cookie named open_id_session_id is saved to maintain each [...]
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