1PFC(1)                      General Commands Manual                     PFC(1)
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NAME

6       pfc - active precompiled filters generator
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SYNOPSIS

9       pfc <expression> >/etc/ppp/your.active.filter
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DESCRIPTION

12       This manual page documents briefly the pfc command.
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14       pfc  is  the  Precompiled  Filter Compiler - a tool to generate "active
15       precompiled filters".  If your pppd supports this feature, you can  use
16       this  utility to generate the filter files.  The Active Filter allows a
17       connect on demand pppd to determine what is 'interesting' traffic,  and
18       then  initiate the PPP session.  The tool allows you to create the fil‐
19       ters, in libpcap format, for use by pppd.  Common filters are  used  to
20       ignore  traffic  (ie:  ntp, various protocol keepalives, etc...) so PPP
21       sessions are not initiated until 'real' traffic requires them.
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23       Note that the generated  compiled  filter  expression  is  specific  to
24       point-to-point  links, and differs from the format generated by tcpdump
25       -ddd.
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27       (specify precompiled-active-filter=/etc/ppp/your.active.filter  in  the
28       ppp options file)
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EXAMPLE

31       /usr/bin/pfc ntp and ldap > /etc/ppp/your.active.filter
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SEE ALSO

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

38       This manual page  was  written  by  Roberto  C.  Sanchez  <roberto@con‐
39       nexer.com>, for the Debian project (but may be used by others).
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43                               October 30, 2008                         PFC(1)
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