2 Source: http://www.fli4l.de/en/home/news/
4 If pppd supports "active precompiled filters", you can use this
5 utiliy to generate them. This is useful for preventing the pppd
6 to bring an on-demand connection up by spurious traffic, such
7 as ntp or routing protocol packets.
9 usage: pfc <expressiona> > /etc/ppp/your.active.filter
11 (specify precompiled-active-filter=/etc/ppp/your.active.filter in the ppp
14 example: ./pfc ntp and ldap