Traffic Grapher monitors network traffic and classifies it by IP address, protocol and other parameters. It acquires traffic information through SNMP, LAN and WLAN packet sniffing and Cisco’s NetFlow. It can also monitor latency by measuring PING times. Graphs show live data (for the past five minutes to an hour), averages for up to 48 hours, hourly averages for up to 60, daily average for up to a year, and more. An internal database can export results as CSV files and zip and purge old data. Reports are available in HTML, PDF, Excel and other formats. An internal Web server offers public or authenticated access to the monitoring results.

There’s a freeware version for up to 10 sensors, a 30-day trial of the commercial version, and the full commercial version, all available here. If you download this software and find it useful, come back and rate it. And if you’ve got links to useful downloads, e-mail ’em to us using the the e-mail link.

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Dave Webb
Dave Webb is a freelance editor and writer. A veteran journalist of more than 20 years' experience (15 of them in technology), he has held senior editorial positions with a number of technology publications. He was honoured with an Andersen Consulting Award for Excellence in Business Journalism in 2000, and several Canadian Online Publishing Awards as part of the ComputerWorld Canada team.