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From Bugzilla Helper: User-Agent: Mozilla/4.78 [en] (X11; U; Linux 2.4.17-0.13 i686) Description of problem: I've recompiled pppd to use the FILTER option. Working great, but I cannot specify extended filter configuration, because they have to be between single quotes which isn't supported by the scripts. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: Working example: PPPD_EXTRA="active-filter outbound" Not working example: PPPD_EXTRA="active-filter 'outbound and not icmp[0] == 3 and not tcp[13] & 4 != 0'" Actual Results: Error message in log is Feb 17 16:58:14 gate pppd[28416]: error in active-filter expression: illegal char ''' Additional info: I've debugged around in the script "adsl-connect", but didn't succeed. The problem is somewhere around: $SETSID $PPPD $PPP_STD_OPTIONS $DEMAND & Putting the $PPP_STD_OPTIONS between " didn't help too, because now pppd treats this all as one option.
It's a bug in ppp.
Thanks to hints in bug https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=71247 this issue can be solved easily: 1) activate filtering in pppd (see also https://bugzilla.redhat.com/bugzilla/show_bug.cgi? id=71247) 2) create a file /etc/ppp/options.adsl containing e.g. active-filter 'outbound and !(udp dst port ntp || udp dst port 3740)' 3) specify usage of this file for additional options in e.g. /etc/sysconfig/network-scripts/ifcfg-ppp0 by PPPD_EXTRA="file /etc/ppp/options.adsl" Voila.