Howdy everyone! Because I travel a lot, I build a list of books which I should buy and read next in the airports, bus stations etc or everywhere I should wait some amount of time. This list contain everything what an System / Application Administrator should know. I’m usually dealing with Java/Tomcat/Glassfish/Jboss under Linux, but also I have a strong background of networking, security and cloud computing. This books are my choice and I think is a good choice for everyone who want to learn or improve your skills as …

Everyone, with a decent Linux security knowledge, should know about ModSecurity – Open Source Web Application Firewall. Personally, I know this mod from 2004 and it help me a lot in detecting and/or preventing malicious attacks before reaching my customers applications.

I searched over internet, on several tens of posts, to find how to delete a crashed Innodb table. Short story: I tried to import a big table but it crashed in the middle of the process (power failure). The table was not very important so I didn’t care about the table, I just want to delete it and start from the scratch, but surprise! The table cannot be deleted! I use the latest MySQL Innodb plugin from Debian backports repository (is coming with Debian 5.1.xx) with file per table …

mod_qos is becoming a very popular module for Apache, from the discover of Slowloris DDoS Attack. It seems, mod_qos is the best solution for Slowloris attack on Apache 2, but you can also check mod_evasive, mod_security or http accelerator “Varnish”. In this post I will try to present a step by step tutorial how to install mod_qos and configure to prevent Slowloris DDoS attack.

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After an Amavis upgraded my e-mail system started to have a strange behavior. A lot of emails sent internally from one user to another stopped with the following message:

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