![]() ![]() 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. 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. The Nagios Core is the heart of the application that contains the core monitoring engine and a basic web UI. ![]() It provides features such as alerting, event handling and reporting. Nagios is a powerful network monitoring tool that helps you to ensure that your critical systems, applications and services are always up and running. Although very useful, this tool has been archived, and now Microsoft recommends using Message Analyzer for the same purpose. 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. ![]() 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. 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. This tool is handy for troubleshooting network problems and applications on the network. Microsoft Network Monitor is a packet analyzer that allows you to capture, view and analyze network traffic. But, don’t take our word for it, download the free trialand try it out. 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. 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. You can use it to scan both small and large networks, in search of software vulnerabilities and unpatched or unlicensed applications. 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. GFI LanGuard (our award-winning paid solution) 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. Here are 20 of the best free tools for monitoring devices, services, ports or protocols and analyzing traffic on your network. We know how administrators love free tools that make their life easier. ![]()
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