Monitorování síťových zařízení pomocí NetFlow

Abstract

The aim of this thesis is to propose a solution for monitoring network traffic using NetFlow, and its subsequent rendering using RRDTool. The first part describes NetFlow protocol itself, specifically its mode of operation, versions and topologies. There are also mentioned NetFlow analyzers and the tool for drawing graphs - RRDTool. In other parts are detailed NetFlow configurations on computers running Linux and Cisko routers. There are also described the configurations of packet generators, a database for storing values and a script that automatically processes the collected NetFlow data from which then creates graphs in the program RRDTool.