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Building the cheapest application firewall

Today we'll learn how to build the cheapest and smallest - but efficient - layer 7 firewall. Then you don't need anymore to buy very expensive appliances for URL filtering (F5 BigIP, Netscaler,..) and you don't have to spend hours to make Apache mod_security work. This security can be added to the Tomcat Security Manager if you are running a reverse-proxy, and provides in-depth security as advised by many including official government services such as ANSSI (Agence nationale de la sécurité des systèmes d’information).

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