Netflow analyzer

NetFlow, developed by Cisco, is a network protocol designed for the collection of IP traffic information and the monitoring of network traffic. Analyzing flow data with NetFlow gives you comprehensive insight into network traffic flow and volume.

Bandwidth hogs, as their name suggests, are individuals hogging the bandwidth. Such misuse has the potential to result in network congestion. For instance, an application requiring a substantial amount of bandwidth to be downloaded might be considered a bandwidth hog.

Generally speaking, the two are synonymous and serve a similar purpose. Both terms refer to a reporting server collecting and analyzing traffic data, making it easier for the user to troubleshoot.

netflow analyzer

NetFlow-enabled network devices will generate records of their NetFlow, which the router exports. These records are then collected with a NetFlow collector, which processes and reformats the data, so it can be interpreted more easily by the user of the tool. This enables the analysis of traffic. NetFlow collectors can either be software-based or hardware-based. Some products may also be able to analyze these alternatives, thereby offering greater versatility.

When looking at the best free tools, I compared their advantages and disadvantages to help you find the best paid NetFlow software on the market. SolarWinds is a developer known for its network, systems, database, and application management tools.

The company is an industry leader and a popular choice for network administrators. With NTA, you can monitor your network, identify patterns in traffic, and actively avoid bandwidth hogs—all keys to making your network faster and more efficient. NetFlow analyzer insights make it easy to gain visibility into malformed or malicious flows of traffic. My favorite thing about NTA is its usability. The dashboards and user interface are clean and uncluttered, simplifying the process of data interpretation.

You can try NTA at no cost by downloading a free day trial. Together, the network management and monitoring functionalities of NPM benefits from the insights NTA provides with its NetFlow monitoring utilities, allowing you stay on top of network performance in addition to better control bandwidth issues. Due to the popularity of both of these products, you can try them out together with Network Bandwidth Analyzer Pack during a fully-functional, free day trial.

SolarWinds also offers a free Flow Tool Bundle which includes three distinct solutions to support configuring NetFlow v5 on Cisco devices, troubleshooting configurations with network flow simulations, and more. ManageEngine, another popular developer, also offers a tool for NetFlow analysis. This flow analyzer, free or paid, provides real-time visibility into the bandwidth performance on your network.

The program supplies users with a holistic view, while focusing primarily on monitoring bandwidth. It can detect a wide range of external and internal threats to security, using its built-in Continuous Stream Mining Engine technology.

Best Netflow Analyzers and Collectors for Monitoring in Real-Time

This makes it a great choice for those of you with security concerns, or who would like to prioritize the identification of network anomalies slipping past your network firewall. This includes the capacity to identify context-sensitive anomalies and zero-day intrusions. The NetFlow Analyzer free version is quite generous. However, the paid versions—Enterprise and Essential—do boast some valuable extras, including alarms and notifications, customizable dashboards, and billing functionalities.

Bear in mind it can only monitor two interfaces at any given time. You can download a day free trial of the paid versions here. PRTG is a sensor-based, one-stop monitoring solution for your network, with some noteworthy tools for analyzing NetFlow, free and paid.

The all-in-one bandwidth tracking solution detects any bandwidth overloads, and is supportive of WMI, packet sniffing, and NetFlow. Overall, this is a great tool for NetFlow analysis. It uses a unique sensor-based pricing model, which, while clever, could result in some users paying for more sensors than they need once their requirements exceed a plan threshold.

The benefit is the option to choose your sensors, thereby customizing your monitoring experience to your specific needs. The free version is limited to sensors. Alternatively, a day free trial of the paid version is available; it reverts to the free version at the end of the trial period.Download the latest product versions and hotfixes. Manage your portal account and all your products.

10 Best Free NetFlow Analyzers

Get help, be heard by us and do your job better using our products. Get practical advice on managing IT infrastructure from up-and-coming industry voices and well-known tech leaders. NetFlow analysis is also an integral part of deciding how and where to best apply Quality of Service QoS policies. It plays an important role in network security, as it can be used to detect Distributed Denial of Service or DDoS attacks, unauthorized activity, and improper network events that could be signs of a cyberattack.

NetFlow analysis and monitoring is an efficient way to collect and retain data related to network applications, communication traffic, endpoints, and users. By collecting and organizing data packets according to IP address, protocol, and transport port—creating compact record files, performing NetFlow analysis can help you more easily focus and simplify your network and security monitoring efforts.

Analyzing flow data records can also help inform many different purposes, including accounting and network forensics. Users can leverage flow data records to help identify data exfiltration, DDoS attacks, misconfigured network devices, and network scans originating from external sources. Cisco NetFlow analyzers are designed to offer more functionality than simple packet and byte aggregation solutions, which includes providing greater insights into traffic and supporting faster troubleshooting with comprehensive data correlation features.

Manually performing traffic analysis across different data types can be a time-consuming process typically requiring multiple tools to gain different metrics, normalize this data, and create a consolidate view. There are three primary components to a Cisco NetFlow analyzer monitoring system. These include a flow exporter, a flow collectorand an analysis application. A flow exporter is responsible for aggregating data packets into flows and exporting records of those flows towards flow collectors.

Flow collectors are responsible for receiving, storing, and preparing flow data from flow exporters for processing. Analysis applications are responsible for analyzing the flow data received from flow collectors for signs of intrusion or malicious traffic profiles. Using a NetFlow analyzer to understand traffic flow data can help you better determine causes of bottlenecks and overall traffic volume, both of which play an important role in capacity planning and ensuring resources are adequately provisioned and properly allocated as an organization scales.

NTA helps make network monitoring easier and accessible by centralizing a comprehensive view of multiple data streams and traffic metrics into a single user dashboard. NTA is built to grant critical visibility into bandwidth utilization and offers a powerful alerting system to keep admins up to date on overall network usage.

NTA can instantly send alerts when interfaces exceed utilization thresholds and will also provide information on top talkers, so you can catch the applications using the most bandwidth. For even deeper visibility, NPM can be included in the Orion Platformwhich is a common technology platform supporting several SolarWinds products to provide a centralized view and experience for monitoring and managing your network, storage, systems, and virtualization environments all from a single dashboard.

You can try both products free for 30 days by downloading Network Bandwidth Analyzer Pack. With NetFlow analysis, you can get insight over months, days, or minutes by drilling down into any network element.After 30 days, PRTG reverts to a free version. Or, you can upgrade to a paid license anytime. NetFlow data provide a more granular view of how bandwidth and network traffic are being used than other monitoring solutions, such as SNMP. Read more. NetFlow Analyzer PRTG lets you check and monitor your bandwidth and determine, for example, the amount of network traffic caused by IP addressesprotocols, or programs.

In order to carry out such an analysis, you'll configure your routers such that flow packets are sent to a computer with a PRTG probe. NetFlow technology puts little strain on your CPU and is especially adapted for networks with heavy data traffic and bandwidth.

NetFlow protocol is mainly supported by Cisco routers and switches. With the PRTG NetFlow Analyzer you can get a holistic view about your networkkeep an eye on your network traffic and what your bandwidth is being used for.

One sensor usually monitors one measured value in your network, e. On average you need about sensors per device or one sensor per switch port. PRTG is an all-in-one tool! The monitoring tool requires no additional upgrade or tool to analyze your bandwidth using Cisco NetFlow. With PRTG, you get one central software solution for all of your monitoring topics — and a complete overview. The need for a combination of many different tools is a thing of the past.

And can be used as a professional NetFlow Analyzer software, as well. PRTG uses an intelligent Auto Discovery to automatically set up comprehensive monitoring, and creates all the sensors you need. NetFlow version 5 is in widespread use. NetFlow version 9 is an advanced form of NetFlow technology. PRTG lets you recognize if your switches are not equipped to handle the quantity of data of your backup solution, before they become completely overloaded.

Individual sources often use disproportionately high amounts of network bandwidth. These sources may be individual users, but also applications or specific data. Many companies experience fluctuations in access to various websites or internally-used applications. Define your own thresholds with PRTG NetFlow Analyzer so you can be informed early: ideally, before the performance of your system takes a hit. Thorough backups can lead to problems for the entire network.

Such problems are frequently the result of individual routers or switches which overload during the backup and thwart the entire network. Administrators must therefore find out beforehand which NetFlow version is supported by their routers and switches.

PRTG simplifies your day Our monitoring software works for you and promptly notifies you of potential issues. It frees you to concentrate on your day-to-day tasks with peace of mind. With PRTG, you get one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app. Customizing PRTG is a breeze. Getting started or switching from another network monitoring tool is easy thanks to the PRTG auto-discovery and pre-configured device templates.

The experience shows that the costs for licenses have paid for themselves within a matter of weeks. Trusted by Simply the best available. Read more reviews. Meets all needs and requirements, This is a must have solution if you are needing any form of monitoring.Download the latest product versions and hotfixes.

Manage your portal account and all your products. Get help, be heard by us and do your job better using our products. Get practical advice on managing IT infrastructure from up-and-coming industry voices and well-known tech leaders. Fully Functional for 30 Days. By analyzing flow data, a picture of traffic flow and volume can be built.

Capture data from continuous streams of network traffic with NetFlow Analyzer. Faster troubleshooting, increased efficiency, and greater visibility into malicious or malformed traffic flows with NetFlow analyzer insights. View both IPv4 and IPv6 flow records. You can also set alerts to be notified if a device stops sending flow data, so you can efficiently remediate the problem. NetFlow Traffic Analyzer collects traffic data, correlates it into a useable format, and presents it to the user in a web-based interface for monitoring network traffic.

Accelerate identification of root cause by dragging-and-dropping network performance metrics on a common timeline for immediate visual correlation across all your network data and NetFlow analytics. Don't spend money on additional bandwidth if it's not needed. In today's mobile world, it's important to keep your wireless network running smoothly. With WLC network traffic analysis, you can easily see what's using your wireless bandwidth.

Visualize the traffic flows on your Cisco Meraki MX and Z series interfaces for better monitoring of the bandwidth use in your Cisco Meraki wireless environment. UDT provides user contact info and switch port location — allowing you to tell the user to reduce their bandwidth usage or to remove them from the network. NTA does that for us, efficiently, effectively, and with beautiful graphs and reports that we can share with management and the site's users, which show the cause of WAN congestion.

The Success Center is your home for onboarding, training, new user information, the product knowledge base, and official product documentation.

The customer portal is where you can submit a help desk ticket, find all of the information about the products you own, and see available hotfixes and upgrades as well as training opportunities for your products.For some time, NetFlow analysis has been one of the core strategies relied on by IT administrators to conduct real-time network monitoring. It is in this area that NetFlow analyzers are worth their weight in gold.

With a NetFlow analysis tool, an administrator can see how efficiently data is transferred across a network without relying on the large volumes of stored data that regular packet capture procedures create. From a glimpse, you can identify whether your network is performing as it should be or whether an underlying issue is decreasing the standard of service.

In a nutshell, deploying a NetFlow analyzer helps determine whether a network is experiencing poor performance, and it conducts troubleshooting if a problem is found. NetFlow is the term given to a network protocol designed by Cisco to collect IP traffic and conduct network monitoring. NetFlow analyzers collect data generated by devices throughout the network and allow the user to view historic and real-time perspectives of the network.

When viewed with a NetFlow analyzer, the data obtained from network devices reveals key details like port numbers and IP addresses. More importantly, it allows you to view the source and destination of all NetFlow traffic. Each device must enable NetFlow in order to see NetFlow data. A NetFlow analyzer offers you one of the best tools to take stock of what is happening on your network. It allows you to interpret real-time and stored traffic data from your network and look for causes of poor connectivity.

The main reasons why administrators use Netflow Analyzers are listed below:. SolarWinds is a big name in the world of network monitoring, and Real-Time NetFlow Analyzer is perhaps the most competitive packet monitoring solution available. This product allows the user to monitor their real-time network and bandwidth usage.

netflow analyzer

You can view your network usage and also packet capture data through a web-based application. These graphs allow you to quickly determine which devices and applications consume the most bandwidth.

You can tell in a matter of seconds if your network experiences poor quality of service. This tool pack includes a simple interface to turn the NetFlow capabilities of your Cisco routers on and off. It also has a tool that replays stored traffic data so you can watch the performance of your network. A third utility will generate extra traffic so you can test your infrastructure in preparation for a planned increase in load on the network.

Network Monitor has become a popular platform on account of its user interface. The navigation tree is very simple so that you can cut straight down to the minutiae of your network traffic.In simple terms, NetFlow Analyzer collects flow information, correlates them and presents the traffic statistics in more representable and understandable form. It offers real-time traffic graphs and reports to know about your traffic behavior and usage by applications, users, and their conversations.

With NetFlow Analyzer you can monitor network traffic in an interface specific level with one minute granularity. The selectable graph allows you to zoom in on the spikes.

NetFlow analyzer also shows the data points, which gives the traffic IN and traffic OUT details such as speed, volume, packets and utilization off the total bandwidth. Not only can you view the last hour to last quarter reports, you can also custom select the time period for which you want to view network traffic report.

These reports can be quite useful when you are presenting to the top management. This helps NetFlow Analyzer to be effectively used as network traffic analyzer. NetFlow Analyzer is a simple, unified network traffic analysis tool, that is easy to deploy and start working with. You can install NetFlow Analyzer on a Windows or Linux machine, and use just a web browser to access the client interface.

Within minutes, graphs are plotted based on detailed network traffic analysis and reports are automatically generated by NetFlow Analyzer. As soon as NetFlow data is received, graphs are generated showing details on incoming and outgoing traffic on the link for the last 10 minutes. From dashboard you can identify which interface, applications, users, ports and protocols are consuming your maximum bandwidth.

NetFlow Analyzer Dashboard allows you to customize your widgets and add them to get a glance of top information that you want to focus in your network. You can start analyzing your traffic data with most intuitive bandwidth reports in Network Traffic Analyzer.

Consolidated reports show you overall traffic statistics for each WAN link.

netflow analyzer

You can view current traffic patterns, along with details on hosts, applications, and conversations generating traffic. Also, with reporting you can analyze network traffic trends to identify peak usage hours, link utilization metrics, and more. NetFlow analyzer also performs in-depth network packet analysis to give you a holistic view of application usage, protocol usage, and other utilization trends.

Incoming and outgoing traffic is analyzed to find out the top applications generating traffic on the network. From here you can drill down to see the top hosts and conversations for each application that is listed.

Before categorizing it as an attack there could be some unusual behaviour in your network. Analyze your network with security reports to follow the unusual behavior and categorize them as either malformed TCP packets or invalid TOS flows or invalid Src-Dest flows or others. Get in-depth traffic insights with our network traffic analysis tool. Complete visibility into: Identify the top talkers in network along with the total traffic usage. Follow monthly traffic trend to know your bandwidth capacity.

All-in-one NetFlow Analyzer PRTG

Fix problems faster with conversation details. Detect any internal or external security threats in the network. Download Free Trial. Download day free trial of NetFlow Analyzer! NetFlow Analyzer provides centralized traffic analysis for our customer's networks with more than interfaces spread geographically. It enables easy troubleshooting of traffic bottlenecks and helps us in capacity planning.

The information provided is user-friendly and enables us to take informed business decisions. Benefits Related Products.As Network engineers and Administrators, many of us are consistently dealing with issues that aren't always as apparent as they seem. So the question then comes: what is NetFlow and what are Network Analyzers? NetFlow software collects and analyzes this flow data generated by routers, and presents it in a user-friendly format.

A few other network vendors have their own protocols for network traffic data monitoring and collecting. Even though Flow data has different names, they all provide mostly the same information and work in similar ways. There are many analyzers and collectors available, and in this article, we will discuss 10 commercial and free NetFlow analyzers and collectors available for Windows.

This tool allows you to sort, graph, and display data in various ways that allow you to visualize and analyze your network traffic. It is great for tasks such as seeing network traffic by type and for specified periods of time, and running tests to see how much bandwidth various applications consume.

This free tool limits you to one NetFlow interface monitoring and keeps only 60 minutes of data. This Netflow Analyzer from SolarWinds is a powerful tool that is definitely worth the download.

Download Now. It includes email monitoring and a TCP timing sequence chart, all combined into you own customized dashboard. You will need NDIS 3 or higher compatible Ethernet, Fast Ethernet, or Gigabit with promiscuous mode driver- this mode lets it passively capture all packets on an Ethernet wire.

It operates by simply pinging each IP address and can resolve host-name, determine MAC address, scan ports, provide NetBIOS information, determine logged-in user on Windows systems, web server detection, and more. Its capabilities can be expanded with Java plugins. A very useful, portable network scanner. It is a powerful piece of software, with a full range of analysis and collection capabilities.

They include real-time bandwidth monitoring and threshold alarms for set bandwidth usage, usage summaries, application and protocol monitoring, and much more.

The free version includes days of unlimited monitoring, and after that it allows for monitoring of only two interfaces. At a minimum, for a flow rate of 0 to flows per second, the recommended requirements are a 2. It automatically scans all devices and draws a map of the network. It monitors servers running on devices and alerts you in case of a problem.

Other features include auto-discovery and mapping of new devices, the ability for you to draw your own maps, provides you access to tools to remotely manage your devices, and more. It lets you view logged-on users, identify bandwidth usage by machine and user, promptly locate and troubleshoot errors before they become major problems, and gives you the ability to do live data capture and analysis. The application includes the capability to create highly detailed graphs and tables that let administrators view traffic anomalies, data filtering to help sift through the large amounts of data, and much, much more.

A tool for the entry-level network technician as well as the hardened administrator, JDSU allows you to fully take control of your network. With Scrutinizer, you can filter and drill down in nearly any way you can imagine, including time frame, host, application, protocol, and much more. The free version allows you to monitor an unlimited amount of interfaces and store up to 24 hours of data. The Freeware version gives you 30 days of unlimited sensors, then sensors free after that.

Although it may not have as many of the visual bells-and-whistles like those of other applications on this list, that does not mean it is lacking in any features or capabilities. The executable binary installation file limits data capture to packets. It is completely free for universities, education users, and non-profit and research organizations.

This comprehensive list of 10 free NetFlow analyzers and collectors should give you the ability to quickly begin monitoring and troubleshooting your networkfrom a small office LAN to a large, multi-site enterprise WAN.

netflow analyzer

If your looking for an open-source variation, see our list of some here. Each application gives you the ability to monitor and analyze traffic on your network, key to finding small errors before they turn into big ones, pinpoint bandwidth anomalies that can be indicative of security threats, visualize your network and its traffic flow, and much, much more. What you can do with the data these Network Analyzers give you is limitless.

A must-have piece of software for all network administrators. Editors Rating. Reviews Tutorials hardware Software Search for:.


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