squint

squint is a Squid proxy log analyzer that generates a detailed report of who is spending the most time and resources browsing the Internet. The top offenders in terms of data transfer, number of files transferred, and on-line time are reported

squint is useful for discovering problems with internet usage patterns. To determine on-line time, it is guesstimated that after a "hit" the person is reading the page for the following two minutes. So the measurement of on-line time is unreliable, but the system does provide a warning that investigation may be warranted