Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT and l7/filter

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About the Author

Lucian Gheorghe has just joined the Global NOC of Interoute, Europe's largest voice and data network provider. Before Interoute, he was working as a senior network engineer for Globtel Internet, a significant Internet and Telephony Services Provider to the Romanian market. He has been working with Linux for more than 8 years putting a strong accent on security for protecting vital data from hackers and ensuring good quality services for internet customers. Moving to VoIP services he had to focus even more on security as sensitive billing data is most often stored on servers with public IP addresses. He has been studying QoS implementations on Linux to build different types of services for IP customers and also to deliver good quality for them and for VoIP over the public Internet. Lucian has also been programming with Perl, PHP, and Smarty for over 5 years mostly developing in-house management interfaces for IP and VoIP services.

I would like to thank everyone who is reading this book and the people that run netfilter, iproute2, and L7-filter projects.Your feedback is very important to me, so drop me a line at <lucian.firewallbook@gmail.com>. The book is far from being perfect so please send me errata information on the same email address (I would love to receive erratas from readers because it will convince me that people who read this book actually learned something :-))

I want to dedicate this book to my father, my mother, and my sister—I love you very very much. Many thanks go to the team at Globtel who were like second family to me, to my girlfriend for understanding me and standing by me, to Louay and the rest of the team at Packt Publishing for doing a great job, to Nigel Coulson, Petr Klobasa and the rest of the people at Interoute for supporting me, to Claudiu Filip who is one of the most intelligent people I know, and last, but not least, to the greatest technical author alive—Cristian Darie.

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