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I've found the simple enclosed perl script useful to use mrtg to graph
traffic through our IP-Filter firewall. The script may need some
fiddling with the regular expressions to graph what you need at your
site; our if-filter configuration blocks everything on the WAN
interface by default and allows specific protocols in with `pass in
quick' and `block in quick' rules on groups from 100-190; hence the
simple regular expressions.
The usage in mrtg.cfg here is:
# firewall
Target[firewall]: `./fw.pl`
Options[firewall]: growright, noinfo, perhour
MaxBytes[firewall]: 50000
Title[firewall]: IP-Filter
PageTop[firewall]: <center>
<h1><font color=red>Firewall Traffic Analysis</font></h1>
<h3>Syn/Ack Packets Passed (Connections) on le1 (24.7.4.75)</h3>
</center>
YLegend[firewall]: Packets per Hour
ShortLegend[firewall]: pkts/hr
Legend1[firewall]: Inbound connections per hour
Legend2[firewall]: Outbound connections per hour
--
Ronald Florence http://members.home.net/18james
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