update : 20/07/2015

NetFilter

netfilter
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Studied version : 1.4.14 Website : http://www.netfilter.org Distributed by : community Licence : GPL Technology : C/C++ Year of creation : 1998

netfilter, sometimes referred to as iptables, is the filtering layer integrated with the Linux kernel. It was created by Rusty Russell in 1998.

It is an extremely flexible system that integrates with the kernel's routing and QoS functionalities, and includes its own NAT functions. It has many filtering criteria (time, data volume, etc.) and connection tracking modules for complex protocols (like FTP, SIP and H323). However, it is complicated to configure, so a third party tool is often used to generate its configuration (Shorewall, ferm, etc.).

netfilter is distributed under the GPL v2.

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Informations

Ohloh users rating 4.26 (68 votes)
lines of code 47935 lines
Contributors
(for the 12 last months)
17
Programming Languages C, 8 Other
Tags network tcpip filter chains sysadmin firewall networking netfilter security rules packetfilter monitoring packetfiltering
Download url http://www.netfilter.org/projects/iptables/downloads.html
Ohloh page https://www.openhub.net/p/iptables