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l7-filter

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Some use of "" in your query was not closed by a matching "".Some use of "" in your query was not closed by a matching "". l7-filter is a software package which provides a classifier for Linux's Netfilter subsystem which can categorize Internet Protocol packets based on their application layer data.[1] The major goal of this tool is to make possible the identification of peer-to-peer programs, which use unpredictable port numbers. There are two versions for this software. The first is implemented as a kernel module for Linux 2.4 and 2.6. The second experimental version was released in December 2006 which runs as a user-space program and relies on netfilter's user-space libraries for the classification process.

Both versions of l7-filter use regular expressions (though the user-space and kernel modules use different regular expression libraries) to identify the network protocol.[2] This technique, used in conjunction with Linux's QoS system, allows application-specific yet port-independent traffic shaping.

All versions of l7-filter have been released under the GNU General Public License.

In December 2017, l7-filter was retired and replaced by the open source Netify Agent.[3]

References[edit]

  1. Gheorghe, Lucian (2006). Designing and Implementing Linux Firewalls with QoS Using Netfilter, Iproute2, NAT and L7-filter. Packt Publishing Ltd. pp. Chapter 5. ISBN 978-1-84719-051-2. Search this book on Amazon.com Logo.png
  2. Chen, Yan; Dimitriou, Tassos D.; Zhou, Jianying (2009). Security and Privacy in Communication Networks: 5th International ICST Conference, SecureComm 2009, Athens, Greece, September 14-18, 2009, Revised Selected Papers. Springer. p. 195. ISBN 978-3-642-05284-2. Search this book on Amazon.com Logo.png
  3. "A fond farewell to l7-filter". L7-Filter Home Page.

External links[edit]




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