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We know how administrators love free tools that make their life easier. Here are 20 of the best free tools for monitoring devices, services, ports or protocols and analyzing traffic on your network. Even if you may have heard of some of these tools before, we’re sure you’ll find a gem or two amongst this list. (our award-winning paid solution) People say it’s good to be modest and not to brag, but we’re so proud of our network management tool that we had to start the list with GFI LanGuard. You can use it to scan both small and large networks, in search of software vulnerabilities and unpatched or unlicensed applications. Information coming from up to 60,000 devices, running on Windows, Mac OS or Linux, will be shown in a centralized web console, so you’ll be able to see the state of your whole network at any moment and from any location. With centralized patch management and network auditing, GFI LanGuard prevents potential compliance issues, but if you’re a sysadmin the fact that all machines are patched and secured will surely seem like a more important advantage.

But, don’t take our word for it, and try it out. Microsoft Network Monitor is a packet analyzer that allows you to capture, view and analyze network traffic. This tool is handy for troubleshooting network problems and applications on the network.

Main features include support for over 300 public and Microsoft proprietary protocols, simultaneous capture sessions, a Wireless Monitor Mode and sniffing of promiscuous mode traffic, amongst others. When you launch Microsoft Network Monitor, choose which adapter to bind to from the main window and then click “New Capture” to initiate a new capture tab. Within the Capture tab, click “Capture Settings” to change filter options, adapter options, or global settings accordingly and then hit “Start” to initiate the packet capture process. Although very useful, this tool has been archived, and now Microsoft recommends using for the same purpose. Nagios is a powerful network monitoring tool that helps you to ensure that your critical systems, applications and services are always up and running.

It provides features such as alerting, event handling and reporting. The Nagios Core is the heart of the application that contains the core monitoring engine and a basic web UI. On top of the Nagios Core, you are able to implement plugins that will allow you to monitor services, applications, and metrics, a chosen frontend as well as add-ons for data visualisation, graphs, load distribution, and MySQL database support, amongst others. Tip: If you want to try out Nagios without needing to install and configure it from scratch, download Nagios XI and enable the free version. Nagios XI is the pre-configured enterprise class version built upon Nagios Core and is backed by a commercial company that offers support and additional features such as more plugins and advanced reporting. Note: The free version of is ideal for smaller environments and will monitor up to seven nodes.

Once you’ve installed and configured Nagios, launch the Web UI and begin to configure host groups and service groups. Once Nagios has had some time to monitor the status of the specified hosts and services, it can start to paint a picture of what the health of your systems look like.

OpenNMS is an open source enterprise grade network management application that offers automated discovery, event and notification management, performance measurement, and service assurance features. OpenNMS includes a client app for the iPhone, iPad or iPod Touch for on-the-go access, giving you the ability to view outages, nodes, alarms and add an interface to monitor. Once you successfully login to the OpenNMS web UI, use the dashboard to get a quick ‘snapshot view’ of any outages, alarms or notifications. You can drill down and get more information about any of these sections from the Status drop down menu. The Reports section allows you to generate reports to send by e-mail or download as a PDF.

Advanced IP Scanner is a fast and easy to use network scanner that detects any network devices (including wireless devices such as mobile phones, printers and WIFI routers) on your network. It allows you to connect to common services such as HTTP, FTP and shared folders if they are enabled on the remote machine. You are also able to wake up and shut down remote computers. The installer allows you to fully install the application on your machine or run the portable version. When you launch Advanced IP Scanner, start by going to Settings >Options to select which resources to scan and how fast/accurate you want the results to be.

You can then choose which subnet to scan and proceed with pressing the “Scan” button. Once the scan is complete, expand the results to see which resources you are able to connect to for each discovered device. Capsa Free is a network analyzer that allows you to monitor network traffic, troubleshoot network issues and analyze packets. Features include support for over 300 network protocols (including the ability to create and customize protocols), MSN and Yahoo Messenger filters, email monitor and auto-save, and customizable reports and dashboards. When you launch Capsa, choose the adapter you want it to bind to and click “Start” to initiate the capture process.

Use the tabs in the main window to view the dashboard, a summary of the traffic statistics, the TCP/UDP conversations, as well as packet analysis. Fiddler is a web debugging tool that captures HTTP traffic between chosen computers and the Internet. It allows you to analyze incoming and outgoing data to monitor and modify requests and responses before they hit the browser.

Fiddler gives you extremely detailed information about HTTP traffic and can be used for testing the performance of your websites or security testing of your web applications (e.g. Fiddler can decrypt HTTPS traffic). When you launch Fiddler, HTTP traffic will start to be captured automatically.

To toggle traffic capturing, hit F12. You can choose which processes you wish to capture HTTP traffic for by clicking on “All Processes” in the bottom status bar, or by dragging the “Any Process” icon from the top menu bar onto an open application. NetworkMiner captures network packets and then parses the data to extract files and images, helping you to reconstruct events that a user has taken on the network – it can also do this by parsing a pre-captured PCAP file. You can enter keywords which will be highlighted as network packets are being captured. NetworkMiner is classed as a Network Forensic Analysis Tool (NFAT) that can obtain information such as hostname, operating system and open ports from hosts. In the example above, I set NetworkMiner to capture packets, opened a web browser and searched for “soccer” as a keyword on Google Images.

The images displayed in the Images tab are what I saw during my browser session. When you load NetworkMiner, choose a network adapter to bind to and hit the “Start” button to initiate the packet capture process. Pandora FMS is a performance monitoring, network monitoring and availability management tool that keeps an eye on servers, applications and communications. It has an advanced event correlation system that allows you to create alerts based on events from different sources and notify administrators before an issue escalates. When you login to the Pandora FMS Web UI, start by going to the ‘Agent detail’ and ‘Services’ node from the left hand navigation pane.

From here, you can configure monitoring agents and services. Zenoss Core is a powerful open source IT monitoring platform that monitors applications, servers, storage, networking and virtualization to provide availability and performance statistics. It also has a high performance event handling system and an advanced notification system. Once you login to Zenoss Core Web UI for the first time, you are presented with a two-step wizard that asks you to create user accounts and add your first few devices / hosts to monitor. You are then taken directly to the Dashboard tab.

Use the Dashboard, Events, Infrastructure, Reports and Advanced tabs to configure Zenoss Core and review reports and events that need attention. PRTG Network Monitor monitors network availability and network usage using a variety of protocols including SNMP, Netflow and WMI. It is a powerful tool that offers an easy to use web-based interface and apps for iOS and Android. Amongst others, PRTG Network Monitor’s key features include: (1) Comprehensive Network Monitoring which offers more than 170 sensor types for application monitoring, virtual server monitoring, SLA monitoring, QoS monitoring (2) Flexible Alerting, including 9 different notification methods, status alerts, limit alerts, threshold alerts, conditional alerts, and alert scheduling (3) In-Depth Reporting, including the ability to create reports in HTML/PDF format, scheduled reports, as well as pre-defined reports (e.g. Top 100 Ping Times) and report templates. Note: The Freeware version of PRTG Network Monitor is limited to 10 sensors. When you launch PRTG Network Monitor, head straight to the configuration wizard to get started.

This wizard will run you through the main configuration settings required to get the application up and running, including the adding of servers to monitors and which sensors to use. The Dude is a network monitoring tool that monitors devices and alerts you when there is a problem. It can also automatically scan all devices on a given subnet and then draw and layout a map of your network. When you launch The Dude, you first choose to connect to a local or remote network and specify credentials accordingly. Click ‘Settings’ to configure options for SNMP, Polling, Syslog and Reports.

Splunk is a data collection and analysis platform that allows you to monitor, gather and analyze data from different sources on your network (e.g. Event logs, devices, services, TCP/UDP traffic, etc). You can set up alerts to notify you when something is wrong or use Splunk’s extensive search, reporting and dashboard features to make the most of the collected data. Splunk also allows you to install ‘Apps’ to extend system functionality.

Note: When you first download and install Splunk, it automatically installs the Enterprise version for you to trial for 60 days before switching to the Free version. To switch to the Free version straight away, go to Manager >Licensing. When you login to the Splunk web UI for the first time, add a data source and configure your indexes to get started. Once you do this you can then create reports, build dashboards, and search and analyze data. Angry IP Scanner is standalone application that facilitates IP address and port scanning.

It is used to scan a range of IP addresses to find hosts that are alive and obtain information about them (including MAC address, open ports, hostname, ping time, NetBios information, etc). When you execute the application, go to Tools >Preferences to configure Scanning and Port options, then go to Tools >Fetchers to choose what information to gather from each scanned IP address.

Icigna is a Linux based fully open source monitoring application which checks the availability of network resources and immediately notifies users when something goes down. Icigna provides business intelligence data for in depth analysis and a powerful command line interface. When you first launch the Icigna web UI, you are prompted for credentials. Once you’ve authenticated, use the navigation menu on the left hand side to manage the configuration of hosts, view the dashboard, reports, see a history of events, and more. Total Network Monitor continuously monitors hosts and services on the local network, notifying you of any issues that require attention via a detailed report of the problem. The result of each probe is classified using green, red, or black colors to quickly show whether the probe was successful, had a negative result or wasn’t able to complete. When you launch Total Network Monitor, go to Tools >Scan Wizard to have the wizard scan a specified network range automatically and assign the discovered hosts to a group.

Alternatively, create a new group manually to start adding devices/hosts individually. NetXMS is a multi-platform network management and monitoring system that offers event management, performance monitoring, alerting, reporting and graphing for the entire IT infrastructure model. NetXMS’s main features include support for multiple operating systems and database engines, distributed network monitoring, auto-discovery, and business impact analysis tools, amongst others.

NetXMS gives you the option to run a web-based interface or a management console. Once you login to NetXMS you need to first go to the “Server Configuration” window to change a few settings that are dependent on your network requirements (e.g.

Changing the number of data collection handlers or enabling network discovery). You can then run the Network Discovery option for NetXMS to automatically discover devices on your network, or add new nodes by right clicking on “Infrastructure Services” and selecting Tools >Create Node. WirelessNetView is a lightweight utility (available as a standalone executable or installation package) that monitors the activity of reachable wireless networks and displays information related to them, such as SSID, Signal Quality, MAC Address, Channel Number, Cipher Algorithm, etc. As soon as you execute WirelessNetView, it automatically populates a list of all reachable Wi-Fi networks in the area and displays information relevant to them (all columns are enabled by default). Note: is a small utility that goes hand in hand with WirelessNetView. It scans your wireless network and displays a list of all computers and devices that are currently connected, showing information such as IP adddress, MAC address, computer name and NIC card manufacturer – all of which can be exported to a html/xml/csv/txt file.

Xirrus Wi-Fi Inspector can be used to search for Wi-Fi networks, manage and troubleshoot connections, verify Wi-Fi coverage, locate Wi-Fi devices and detect rogue Access Points. Xirrus Wi-Fi Inspector comes with built-in connection, quality and speed tests.

Once you launch Wi-Fi Inspector and choose an adapter, a list of available Wi-Fi connections is displayed in the “Networks” pane. Details related to your current Wi-Fi connection are displayed in the top right hand corner.

Everything pretty much happens from the top ribbon bar – you can run a test, change the layout, edit settings, refresh connections, etc. This list wouldn’t be complete without the ever popular WireShark. WireShark is an interactive network protocol analyzer and capture utility. It provides for in-depth inspection of hundreds of protocols and runs on multiple platforms. When you launch Wireshark, choose which interface you want to bind to and click the green shark fin icon to get going.

Packets will immediately start to be captured. Once you’ve collected what you need, you can export the data to a file for analysis in another application or use the in-built filter to drill down and analyze the captured packets at a deeper level from within Wireshark itself. KM November 17, 2015 at 6:02 pm An update, after trying several complicated tools that did not help whatsoever, I discovered Little Snitch. Be forewarned, it’s an active filtering service, notifying you of anything trying to access the Internet.

Also, the free version will run this service and then deactivate after a few hours. Since I wasn’t interested in the filter, I just turned it off, and it continued to monitor general app Internet usage. From there, I could sort by highest use, and later that day I could see the culprit. My screensaver was constantly streaming HD video!

This put my usage from about 1 GB a day to over 30 GB a day! Now I run the free app Bandwith+ (In the App Store) to keep an eye on overall band with use.

Hope this helps! KM November 17, 2015 at 6:10 pm Sorry, I forgot to note the most important thing.

I was able to narrow the problem down to one of my Mac systems, and from there I could zero in on what was draining my bandwidth, using Little Snitch. In order to narrow it down, I finally realized I was going to have to monitor activity at the router. If yours doesn’t do this, you will have to hack it like I did. I settled on an open source project called Asuswrt-Merlin: It is apparently a safe modification of the factory firmware that provides more functionality, like real time or logged monitoring of data usage BY DEVICE.

So I could see there was only one data hog out of the 20+ devices connected to my network. I know most people won’t have an Asus router but perhaps there is something equivalent for your router, or if you are desperate enough, you might want to upgrade to Asus!

Harold Krause October 12, 2015 at 5:57 pm We are looking for a way to continuously monitor our security video servers (have about 40 total in the Ga. Region) like our other critical servers out there, in order to ensure the OS is running and we have network connectivity to them in order to minimize downtime. As a possible alternative I would be interested in getting an application we could run that would automatically run through a list of IP addresses of our devices, pinging each one periodically and popping up some kind of alert to tell us if I have a server no longer responding to ping.

Paul Ferrill The Best Network Monitoring Software of 2018 Poor bandwidth and network utilization can affect the productivity of every user connected to your corporate network. We test 10 network monitoring solutions that can help you keep your company's network running reliably. What Is Network Monitoring? Network monitoring services are a critical component to keeping a company's data center healthy and functioning. These services detect, monitor, and analyze your network, examining applications and devices in real time, which can help you quickly respond to warning alerts.

Because of this, it's imperative that IT organizations properly manage these services. Years ago, unreliable networks used to result in delays in email or something else for which it was easy to find a workaround. Today, however, an unreliable data network can literally bring a business to a standstill. For instance, if the systems attached to your network can't get an IP address by using (DHCP), then they won't be able to communicate with any other system.

Similarly, if (DNS) isn't functioning properly, then your systems won't be able to look up the address of any system on the internet. The way in which you manage bandwidth and network utilization will directly affect the productivity of all users connected to your corporate network. To help you, we've tested and compared 10 of the top network monitoring software solutions available today. Most are cloud-based and all of them can help you keep your users connected and your network pipes safe. Some of those services cross over into the category of infrastructure due to the criticality of the service. Monitoring services such as DNS then becomes more of an issue as opposed to a network consideration. DHCP probably fits the same description, although the managing of a DHCP service would be something for which a network administrator would typically be responsible.

(SNMP) was first introduced in 1998 under (RFCs) 1065, 1066, and 1067. SNMPv2 and SNMPv3 have, for the most part, replaced the initial version and have seen widespread adoption across a variety of platforms. While SNMP is most frequently associated with networking, you can also configure operating systems (OSes), to include Microsoft Windows, to respond to SNMP commands. A key consideration for network management tools should be how they use SNMP to accomplish their tasks. If you really want to know what's happening on your network, then you'll need to learn something about network flows. Was originally introduced for Cisco routers, providing the ability to analyze IP network traffic entering or exiting a specific interface. Flow data is sent to a collection point (typically a system running a database) to make query-based analysis easier.

Other switch manufacturers followed suit, along with other similar sampling tools such as. A large number of including Arista Networks, Brocade Communications Systems, Hewlett-Packard, and others provide native sFlow support. You can find a full description of sFlow under. Important Features A number of key features stand out as specific needs to adequately fulfill the role of network management.

For one, from an administrator's perspective, it's nice to have visual graphics that give you a quick overview of the current system status. Having the ability to tweak the arrangement of graphical elements on a dashboard is an added plus. Movie Dubbing Software English To Hindi Converter Free Download there. Providing a mechanism to alert someone of a problem is necessary across the board. (IPAM) has become a vital capability for many large organizations.

Keeping track of statically assigned addresses, along with a large number of DHCP pools, can't be adequately managed with a manual system. Integrating IPAM with a network management tool just makes sense as the same person quite frequently handles both functions. Automation is the key to managing large numbers of devices. The more you can automate small administration tasks, the more efficient the process becomes. Automated alerting and repair fall into this category and represent a key differentiator between products.

Add to that the ability to remotely connect to your monitoring system, and you have the makings of a solid product. (SDN) is a hot topic and not without a significant level of confusion—unless you happen to be either a vendor or a technologist with a vested interest. At a very high level, the term SDN is used to describe the functional separation of the network control plane and the forwarding plane, making it possible to dynamically configure data paths for optimum performance. None of these products really get into SDN, except at the top level of monitoring the performance of a switch. How We Tested In this roundup, we call out several areas to help focus the evaluation.

While installation and setup is something you really only do once, it's still an area of interest. For the network management category, the initial configuration may include making changes to your switches in order to enable the transmission of NetFlow or sFlow data. Changes to production switches typically require a significant amount of justification and approval prior to implementation. It would be prudent to prove any of these test methods on a small test network before moving onto any larger environment.

That being said, we used an managed switch as the primary sFlow source. Enabling sFlow on the switch required the entry of a number of commands at the switch (CLI) over an connection. We also had to upgrade the switch firmware to the latest version for everything to work correctly. At least one product (ManageEngine OpManager) provided a script to enable sFlow along with a one-page 'how-to' document to do that for you. From an administrator's perspective, the user interface (UI) must be easy to navigate and customize.

It should quickly present any problem areas and allow an operator to drill down for more specifics without a huge number of clicks. The customization of the UI and management of features must not require a programmer to make it properly work.

Alerting is a basic requirement, with the ability to customize the priority and delivery an equally important feature. Reporting should be equally as easy to administer. Creating a new report with a query specific to the information of interest should not require a database administrator.

Extra points are given here for useful graphics and multiple export formats. Role-based access may not be a big deal for a small organization but it would be for a group with multiple IT administrators. The bottom line with network management is to keep the network smoothly functioning, with an eye on overall usage. Having the ability to see trends and potential problems can help stave off any future problems and add value to any product.

How to Buy The first step for any IT project is to define the requirements. For network management tools, the foundational pieces include the ability to see detailed information about key pieces of hardware such as switches and routers. Many organizations don't have the staff to monitor computer screens 24/7. Automated alerting and remediation would be a key requirement in that case to help reduce the administrative manpower required. Trend-based reporting and monitoring help determine utilization levels and identify potential bottlenecks before they become a problem. Good reporting tools would be another requirement, to include the ability to create customized reports and queries. Once you have that list of essential requirements, you should be able to look at each one of these products and determine if they meet those requirements or not.

If more than one product qualifies, you'll need to do some testing on your own to see which one best suits your needs. Pricing varies, starting with free, then from a low-end, per-server, per-month of $1.24 up to a purchase price of $1,995 for up to 50 devices.