![]() ![]() Although OpManager doesn’t do auto-discover of individual devices, it’s possible to add those devices via SSH authentication and SNMP, so it can take some time to add all of your devices. OpManager includes alarms volume management, monitoring for CPU utilization monitoring and applications, and even offers network policy violation summaries. This take on the network manager can be installed on Linux and Windows and uses a web-based interface for access, so you can install the platform on a centrally located server (either on bare metal in your data center or a third-party cloud host) and access the interface from anywhere. OpManager can keep tabs on servers, networks, virtual servers, storage and nearly all types of network equipment. ManageEngine OpManager is a very powerful monitoring tool that does far more than the average monitor. ManageEngine OpManager Image: ManageEngine Wireshark is free and can be installed on Linux, macOS and Windows. It offers a handy three-pane packet browser, but setting up and running a capture does require some skill. The one caveat to using Wireshark is the UI does have a bit of a learning curve. You can set up a capture-the-flag challenge to test possible candidates. This tool is also a very solid option for IT recruiting. The second you see unusual activity from within Wireshark, you can act on it to mitigate the issue. You can filter on specific ports or protocols and even capture a specific packet and view the entire stream associated with the packet. Simply put, if there’s something you’re searching for on your network, Wireshark can help you find it. One of the most powerful features of Wireshark is its extensive filtering capabilities. You can capture traffic and view it in real-time or save it for later analysis. ![]() With Wireshark, you can easily analyze both incoming and outgoing traffic to troubleshoot your network. Not only is this tool free to use, but it’s also open-source, incredibly powerful and does a remarkable job of giving you insights into what’s happening within your network. When I need to monitor a network, Wireshark is always the first tool I grab. You’ll probably find one or more of these winds up in your regular toolkit for network admin duties. I want to offer my five favorite network monitoring tools. Some network monitors do too little, some too much and some offer the perfect blend of features and ease of use. These tools range from the simplistic to the overly complicated, from open-source and free to proprietary and costly. One tool that’s instrumental in keeping you apprised of issues is the network monitor. SEE: 5 programming languages network architects should learn (free PDF) (TechRepublic) Or, if you’ve not already had to go through the nightmare that is a problematic network … you eventually will. Your network is either constantly under the threat of attack or suffering from bottlenecks caused by misconfigured or compromised systems. For more info, visit our Terms of Use page. This may influence how and where their products appear on our site, but vendors cannot pay to influence the content of our reviews. We may be compensated by vendors who appear on this page through methods such as affiliate links or sponsored partnerships. But which tool, out of the thousands, should you consider for your tool kit? Jack Wallen offers up his five favorites. Network monitors are an absolute must-have for any network administrator. Network monitoring tools every admin should know
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