Hello, Pablo Neira Ayuso, Patrick McHardy and I have worked on a document we've called "Secure use of iptables and connection tracking helpers". This is a guide describing how to use securely the connection tracking helpers. This is a recommended reading for all Netfilter/Iptables users. HTML version: http://home.regit.org/netfilter-en/secure-use-of-helpers/ PDF version: http://home.regit.org/wp-content/uploads/2011/11/helper-recommandation.pdf BR, -- Eric Leblond Blog: http://home.regit.org/
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