l7-filter replacement

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http://www.linuxquestions.org – Does anybody know of any alternatives to l7-filter (http://l7-filter.sourceforge.net), the package isn't maintained any longer and I would like to find a suitable replacement. For those who don't know what l7-filter is, it's a Deep packet inspection add-on for iptables and let's you detect traffic based on protocol. (HowTos)