A look at Netflow
A look at Netflow (31 Aug 2005):
Netflow is a Linux or BSD based network data collection and reporting system.“Netflow provides a session-level view of network traffic, recording information about every TCP/IP transaction that occurs over your network. It might not be as complete a record of network traffic as tcpdump can provide, but it’s also much easier to manage and much more informative when aggregated.” Monitoring Network Traffic with Netflow