NetFlow is a feature that was introduced on Cisco routers around 1996 that provides the ability to collect IP network traffic as it enters or exits an interface. By analyzing the data provided by NetFlow, a network administrator can determine things such as the source and destination of traffic, class of service, and the causes of congestion. A typical flow monitoring setup (using NetFlow) consists of three main components:[1]
Flow exporter: aggregates packets into flows and exports flow records towards one or more flow collectors.
Flow collector: responsible for reception, storage and pre-processing of flow data received from a flow exporter.
Analysis application: analyzes received flow data in the context of intrusion detection or traffic profiling, for example.
^Hofstede, Rick; Čeleda, Pavel; Trammell, Brian; Drago, Idilio; Sadre, Ramin; Sperotto, Anna; Pras, Aiko (2014). "Flow Monitoring Explained: From Packet Capture to Data Analysis with NetFlow and IPFIX". IEEE Communications Surveys & Tutorials. 16 (4): 2037–2064. doi:10.1109/COMST.2014.2321898. S2CID 14042725.
subsequently analysed). NetFlow and IPFIX are flow export protocols that aim at aggregating packets into flows. After that, flow records are sent to a collection...
A flownet is a graphical representation of two-dimensional steady-state groundwater flow through aquifers. Construction of a flownet is often used for...
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the total cash flow of a company. The net cash flow only provides a limited amount of information. Compare, for instance, the cash flows over three years...
which consists of the NetFlow analysis tools NfSen and NfDump and the Flowmon appliance. Network traffic measurement IP Flow Information Export NetFlow...
watchdogging. NFSen/NFDump, used to collect and analyze NetFlow information. FProbe, used to generate NetFlow data from captured traffic. Nagios, used to monitor...
the flow. Mass continuity (conservation of mass) The rate of change of fluid mass inside a control volume must be equal to the net rate of fluid flow into...
flow, or just a flow, is a pseudo-flow that, for all v ∈ V \{s, t}, satisfies the additional constraint: Flow conservation constraint: The total net flow...
hypotonic solution resulting in a lower external osmotic pressure and a netflow of water into the cell. Through observation of plasmolysis and deplasmolysis...
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web server, creating a HTML dump of the network status. It supports a NetFlow-sFlow emitter-collector, a Hypertext Transfer Protocol (HTTP) based client...
while supporting standard management interfaces and protocols such as NetFlow, sFlow, SPAN, RSPAN, CLI, LACP and 802.1ag. In addition, Open vSwitch is designed...
Two physical systems are in thermal equilibrium if there is no netflow of thermal energy between them when they are connected by a path permeable to heat...
hallmark of an evanescent field is that there is no net energy flow in that region. Since the netflow of electromagnetic energy is given by the average...
information from traffic flow. Its Flowmon product series consists of network monitoring probes, collectors for flow data (NetFlow, IPFIX and other standards)...
of zero. Applying an electric field adds to this random motion a small netflow in one direction; this is the drift. Drift velocity is proportional to...
DNS forwarding, TFTP server, web proxy, PPPoE access concentrator, NetFlow/sFlow sensor, QoS. VRRP for IPv4 and IPv6, ability to execute custom health...
Net capital outflow (NCO) is the netflow of funds being invested abroad by a country during a certain period of time (usually a year). A positive NCO...
made to try to eliminate distortions. Free cash flow may be different from net income, as free cash flow takes into account the purchase of capital goods...
Java SE 7 Erlang/OTP The following applications implement SCTP: WebRTC NetFlow In the absence of native SCTP support in operating systems, it is possible...
communication protocols. Typical protocols are ICMP, SNMP, WMI, NetFlow, jFlow, sFlow, but also communication via DCOM or the RESTful API is possible...
In financial accounting, a cash flow statement, also known as statement of cash flows, is a financial statement that shows how changes in balance sheet...
decreasing values of the netflow scores. According to the definition of the multicriteria preference degree, the multicriteria netflow can be disaggregated...
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