Though Icinga started out just as a fork to Nagios, the developers completely rewrote the Icinga core to increase its responsiveness, reduce complicated setups, and ease of use. Features of Icinga include but not limited to monitoring all the network services and components, even handlers, customizable template-based reports, and plugin support. Just like Cacti, Icinga can create detailed graphs for analysis and data manipulation. Though Icinga still uses text files for configurations, the process is much more improved when compared to Nagios.
Zabbix is a very popular and industry-leading network monitoring tool that is mostly used by the big guys like Salesforce, Dell, etc. One of the best things about Zabbix is that it not only has one of the best and easy to use user interface, but it allows you to do almost all the configuration stuff via the web interface. Which simply means that the learning curve is not as steep as Nagios.
Additionally, Zabbix supports automatic discovery of the connected network and its components. Keep in mind that Zabbix comes in client and server architecture. Which means that you need to install the Zabbix agent on the client machine to properly monitor its activities.
Other features of Zabbix include self-protection against unwanted configuration changes and brute-force attacks, script automation, ability to integrate with other industry management tools like bcfg2 and Puppet.
Other features include provisioning, event management, service monitoring, ability to self-clear problems, detailed performance reports and help desk ticketing support. To get started as quickly and efficiently as possible, OpenNMS has detailed documentation and educational video tutorials. Which means that you can use LibreNMS on almost any router to gather the data as extensively as possible. One of the neat features of LibreNMS is its alerting system.
You can configure alerts based on a variety of events and when triggered, it can send notifications to you via different channels like SMS, Slack, Email, etc. The user interface of LibreNMS is pretty straightforward and clutter free. This makes it easy for the beginner to get started easily. Of course, there is detailed documentation of each and every feature, if you ever need help. Of all the network monitoring tools listed here, Pandora FMS is the most versatile one when it comes to features.
The free version of PRTG Network Monitor provides a well-stocked toolbox for monitoring a small network, download the free trial here.
For more details, see The best free NetFlow analyzers and collectors for Windows. But in the category of bandwidth monitoring, there are many tools that go in the other direction, monitoring the bandwidth of a single PC. NetWorx is a clean tool that will monitor the bandwidth usage on one or more PCs, or a single Mac or Linux machine; and it can also monitor bandwidth on your router to the Internet via SNMP. Besides graphing bandwidth, NetWorx provides several tools like a speed meter and a per-user usage report.
ManageEngine produces a full network management suite and offers free versions of some of their tools. In our article on the best free NetFlow analyzers and collectors for Windows , we looked at the ManageEngine NetFlow Analyzer which provides real-time visibility into network bandwidth and traffic patterns, when you have devices that support NetFlow. The NetFlow Analyzer displays traffic by applications, conversations, protocols, etc; it can alert you to problems and has a range of report-generation options.
It runs on Windows or Linux. The free edition supports monitoring 10 devices and their interfaces. Setting up the OpManager is a multi-step process but not overly complex. You can view graphs and tables of network usage, speed, and bandwidth, as well as device hardware metrics, either rolled up at the device level or drilling down to a particular interface.
At the interface level, you can generate reports showing bandwidth from the past 12 hours up to the past month. You can also set thresholds to receive automated alert email or SMS messages. By monitoring the gateway to your ISP, you can check your internet traffic usage and how much bandwidth you actually receive. The Bandwidth Monitoring tool, combined with the other features of the free version of ManageEngine OpManager, provides you with a well-rounded suite of capabilities for monitoring 10 or fewer devices on a small network.
The community version of ntopng is free; the professional small business and enterprise versions require buying a license. All versions do packet capture; the enterprise version also uses SNMP. To receive flow data ntopng depends on nProbe ; a fully-functioning version of nProbe requires a paid license.
Licenses are free to educational and nonprofit organizations. The tool first traces all of your devices and lists them in a left-hand menu panel in the interface. You can switch between devices just by selecting a different IP address in the list. The main panel of the screen shows live traffic and distinguishes the applications sourcing each traffic flow with different colors.
With this display, you can see all of the applications operating on the network simultaneously. That segmentation of traffic can also be switched to show the endpoints, domain or protocol that generates the traffic instead of the applications. It can also compress the display to identify each active exchange, or conversation, being carried out on the network.
The tool runs on Windows and it is only intended for quick checks. WhatsUp monitors network traffic, servers, virtual servers, cloud services, and applications. The free version is a free five-point license for monitoring up to five resources eg, five servers. WhatsUp must be installed on Windows. Setup is simple and uses auto-discovery. The user interface provides multiple views with an interactive network map and the ability to drill down to investigate issues.
Dashboards are customizable. WhatsUp provides many canned reports, including reports for bandwidth and utilization; you can design customized reports, too. You can configure alerts to notify you when senders or receivers exceed bandwidth thresholds when interfaces exceed utilization thresholds, etc.
There are multiple possible methods for notification, including email and SMS. Triggered actions give the ability to execute actions automatically as responses to alerts. The free edition of WhatsUp Gold is a straightforward and fully featured tool for monitoring and managing a small shop.
Graduating to the for-cost version lets you move up to covering large networks. Several good free options are available to monitor the bandwidth of your network. Picking the appropriate one will depend on your installed network hardware, the size and sophistication of your network, and how you expect it to grow. Many network monitoring tools are able to cover WANs, allowing one central network management team to monitor the networks at many sites.
Cloud-based network monitoring tools all operate a remote monitoring system. In order to get around network security, these remote monitoring tools usually require an agent service to be installed on the remote network. Description: ntopng is an open source network traffic analysis tool that also features network monitoring capabilities. The tool is a network traffic probe that sorts network traffic into different criteria, including IP addresses and throughput.
By characterizing network traffic, your enterprise can easily determine different network statistics that are affecting your network. The Observium network monitoring platform features automatic discovery of connected devices, ensuring that the map of your network is up to date. This way, users can account for any new devices as they connect to the network. Description: Opmantek Network Management Information System is an open source network management solution for scalable network performance and device status monitoring.
NMIS has support for 10, vendors and classifies network events based on their business impact. Pandora FMS. It not only features network monitoring capabilities, but also Windows and Unix servers and virtual interfaces. You can also install agents on devices to observe factors like device temperature and overheating, as well as logfile occurrences. Description: Paessler is a network monitoring provider that offers a free version of their solution: PRTG Paessler offers this tier of their monitoring program that supports devices on a single network.
PRTG monitoring features include tracking network traffic, applications, data packets, and bandwidth. Description: Prometheus is an open source monitoring solution focused on data collection and analysis. It allows users to set up network monitoring capabilities using the native toolset. The tool is able to collect information on devices using SNMP pings and examine network bandwidth usage from the device perspective, among other functinos.
The PromQL system analyzes data and allows for the program to generate graphs, tables, and other visuals on the systems it monitors. Description: Spiceworks Network Monitoring is a free tool offered as a part of a Spiceworks monitoring and management solution suite. Their monitoring solution offers real-time monitoring capabilities for networks and devices.
You can perform ping checks to verify that your network and all connected nodes are currently functional.
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