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The "libnetfilter_log" project

What is libnetfilter_log?

libnetfilter_log is a userspace library providing interface to packets that have been logged by the kernel packet filter. It is is part of a system that deprecates the old syslog/dmesg based packet logging. This library has been previously known as libnfnetlink_log.

libnetfilter_log is used by ulogd2.


libnetfilter_log requires libnfnetlink and a kernel that includes the nfnetlink_log subsyste (i.e. 2.6.14 or later).

Main Features

  • receiving to-be-logged packets from the kernel nfnetlink_log subsystem


You can check the library documentation generated in doxygen format.

Git Tree

The current development version of libnetfilter_log can be accessed at


libnfnetlink_log has been written by Harald Welte.

Copyright © 1999-2014 Harald Welte, Pablo Neira Ayuso . Pablo Neira Ayuso