Cacti & iptables

#!/usr/bin/perl # # This is a quick perl script to  # pull bandwidth usage from iptables chains # # If you use/optimize this script, please let me know. # Brian Stanback : brian [at] stanback [dot] net  # Example iptables rule for web bandwidth usage: # > iptables -N WWW # > iptables -A WWW -j ACCEPT # > iptables -A INPUT -p tcp -m tcp --dport 80 -j WWW # > iptables -A OUTPUT -p tcp -m tcp --sport 80 -j WWW # # Run "iptables.pl WWW" as root to test, note that you can  # combine more than one protocol into a single chain. # # Sudo Configuration (/etc/sudoers) # > www-data    ALL = NOPASSWD: /usr/share/cacti/scripts/iptables.pl # # The Input String should be set to "sudo <path_cacti>/scripts/iptables.pl <chain>" # and you will need to setup an input field so that the <chain> argument can be passwd. # # The data input type should be set to COUNTER #  if ($ARGV[0]) {         $chains = `/sbin/iptables -xnvL | grep -A 2 'Chain $ARGV[0]'`;         @chains = split(/\n/, $chains);         $chains[2] =~ /[\W+]?[0-9]+\W+([0-9]+)\W+/;         print $1; } else {         print "Usage: $0 Chain\n"; } 

http://rodotelmi.rebstech.com/2008/06/30/cacti-with-iptablesipfw-traffic-monitoring/