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 filters, 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@connexer.com>,
for the Debian project (but may be used by others).