[root@pf-dev pf]# service packetfence restart
Restarting PacketFence...service|command
pfdhcplistener|stop
pfmon|stop
pfdetect|stop
httpd|stop
snmptrapd|stop
pfsetvlan|stop
snort|stop
Checking configuration sanity...
Uncaught exception from user code:
        monitor interface not defined, please disable trapping.dectection or set an interface type=...,monitor 
in pf.conf at /usr/lib/perl5/vendor_perl/5.8.8/Log/Log4perl/Logger.pm line 884
 at /usr/local/pf/bin/pfcmd line 2225
        main::sanity_check('pfdhcplistener', 'pfmon', 'pfdetect', 'httpd', 'snmptrapd', 'pfsetvlan', 
'snort') called at /usr/local/pf/bin/pfcmd line 1022
        main::service() called at /usr/local/pf/bin/pfcmd line 997
        main::service() called at /usr/local/pf/bin/pfcmd line 172
        main::__ANON__() called at /usr/local/pf/bin/pfcmd line 186

[root@pf-dev pf]# bin/pfcmd service httpd start
Checking configuration sanity...
Uncaught exception from user code:
        monitor interface not defined, please disable trapping.dectection or set an interface type=...,monitor 
in pf.conf at /usr/lib/perl5/vendor_perl/5.8.8/Log/Log4perl/Logger.pm line 884
 at bin/pfcmd line 2225
        main::sanity_check('httpd') called at bin/pfcmd line 1022
        main::service() called at bin/pfcmd line 172
        main::__ANON__() called at bin/pfcmd line 186

Nov 16 12:30:34 pfcmd(0) FATAL: monitor interface not defined, please disable trapping.dectection or 
set an interface type=...,monitor in pf.conf (main::sanity_check)