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Traffic Control is a Linux toolbox to control squid, NAT, and other
services traffic limits. TF uses Linux iptables to count traffic.
This utility consists of two parts. The first is server side
(written in Perl) and the second part is the interface.
IPFWstats is a suite of shell, perl and PHP scripts to count network traffic on
a per user basis on a server using the FreeBSD IPFW firewall. Statistics are imported into a MySQL database daily and can
then be viewed using a PHP script in a web browser
Loggrep greps kernel logfiles on ipchains and iptables firewall log entries and features the ability to filter against given entries (date, IP, port, ..).
It also features quasi-detection of protscanning, line count
and html output.