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.

This list is intended to supplement 101 Free SysAdmin Tools.

Even if you may have heard of some of these tools before, Im confident that youll find a gem or two amongst this list.

GFI LanGuard (our award-winning paid solution) People say its good to be modest and not to brag, but were so proud of our network management tool that we had to start the list with GFI LanGuard.

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You can use it to scan both small and large networks, in search of software vulnerabilities and unpatched or unlicensed applications.

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Information coming from up to 60,000 devices, running on Windows, Mac OS or Linux, will be shown in a centralized web console, so youll 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 youre a sysadmin the fact that all machines are patched and secured will surely seem like a more important advantage.

But, dont take our word for it, download the free 30-day trial and try it out.

By adding Color Rules to different protocol traffic, you can make scanning through areas of interest easier and faster.

Some of its highlighted features include automated data capture (using PowerShell cmdlets to start or stop traces based on a particular trigger), TLSSSL decryption support and customizable filter expressions.

Microsoft Message Analyzer allows you to assess multiple log data sources from a single pane of glass.

You can capture, view and analyze network protocol traffic side-by-side with other system or application events (e.g., Event Logs or SQL Tables), making it a valuable addition to your network toolkit.

When you launch Microsoft Message Analyzer, click Start Local Trace to immediately start capturing traffic from the local machine, or New Session to add a Data Source to capture.

Nagios 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.

Nagios Core is the heart of the application that contains the core monitoring engine and a basic web UI.

On top of Nagios Core, you can implement plugins that will allow you to monitor services, applications, and metrics, a chosen frontend as well as add-ons for data visualization, graphs, load distribution, and MySQL database support, amongst others.

Once youve 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 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 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.

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 fastaccurate you want the results.

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 can connect to for each discovered device or export your results to XMLHTMLCSV.

Capsa Free Capsa Free is a network analyzer that allows you to monitor network traffic, troubleshoot network issues and analyze packets.

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