L7-filter
Encyclopedia : L : L7 : L7F : L7-filter
L7-filter is a classifier for Linux's Netfilter subsystem that identifies packets based on application layer data. It complements existing Netfilter classifiers that match on IP address, port numbers and so on.
L7-filter uses regular expressions to identify different protocols packets. This technique used in conjunction with a QoS system allows port independent traffic shaping.
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