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PFC(1)									PFC(1)

NAME
       pfc - active precompiled filters generator

SYNOPSIS
       pfc <expression> >/etc/ppp/your.active.filter

DESCRIPTION
       This manual page documents briefly the pfc command.

       pfc  is	the  Precompiled  Filter Compiler - a tool to generate "active
       precompiled filters".  If your pppd supports this feature, you can  use
       this  utility to generate the filter files.  The Active Filter allows a
       connect on demand pppd to determine what is 'interesting' traffic,  and
       then  initiate the PPP session.	The tool allows you to create the fil‐
       ters, in libpcap format, for use by pppd.  Common filters are  used  to
       ignore  traffic	(ie:  ntp, various protocol keepalives, etc...) so PPP
       sessions are not initiated until 'real' traffic requires them.

       Note that the generated	compiled  filter  expression  is  specific  to
       point-to-point  links, and differs from the format generated by tcpdump
       -ddd.

       (specify precompiled-active-filter=/etc/ppp/your.active.filter  in  the
       ppp options file)

EXAMPLE
       /usr/bin/pfc ntp and ldap > /etc/ppp/your.active.filter

SEE ALSO
       pfc    is    from   the	 FLoppy	  Isdn	 4   Linux   project   -   see
       http://www.fli4l.de/en/home/news/

AUTHOR
       This manual page	 was  written  by  Roberto  C.	Sanchez	 <roberto@con‐
       nexer.com>, for the Debian project (but may be used by others).

			       October 30, 2008				PFC(1)

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