Zabbix supports agent-less monitoring using technologies such as SNMP, ICMP, Telnet, SSH, etc., and agent-based monitoring for all Linux® distros, Windows® OS, and Solaris®. Zabbix is probably the most widely used open-source network monitoring tool after NagiosĬomplex to set up, Zabbix® comes with a simple and clean GUI that makes it easy to manage, once you get the hang of it. We especially like its device support and graphing capabilities. Cacti also allows you to add multiple users and give them access with or without edit permissions, which is perfect for service providers and enterprises with a large NOC team.Ĭacti’s strength lies in its community of developers who have contributed many plug-ins, scripts, and templates that can be used to monitor almost every type of device. Cacti leveraging on RRDTool has the ability to generate any type of graph for any data set, and the graphing used in Cacti is the standard used by many open-source and commercial tools. RRDTool’s data consolidation lets you store collected data forever, and is limited only by the size your storage. Cacti leverages the power of RRDTool, which is an open-source data logging and graphing system for storing polled data in the database, and creating graphs from the stored data sets. You can also extend Cacti’s capabilities to use scripts, queries, or commands for data collection, and save it as a template to use for polling other devices for similar data sets. If you have a device, it’s possible that Cacti’s active community of developers has created a monitoring template for it.Ĭacti supports SNMP polling, which itself covers a wide range of network devices. CACTIĬacti® is a network monitoring tool that allows you to collect data from almost any network element, including routing and switching systems, firewalls, load balancers, and servers, and put that data into robust graphs. If you have the time to invest in learning and mastering this tool, Nagios Core offers good network monitoring capabilities.
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Quality NOC can provide support for installation, configuration and development of new features to check software and hardware. For support, users can always get help from the Nagios community, or opt for a commercial support package from Nagios Enterprise. Nagios can be overwhelming for beginners and enterprises that do not have enough IT support staff, but it provides good monitoring powers. There are plugins that provide an easier and better GUI, address many limitations in the Core®, and support features, such as auto discovery, extended graphing, notification escalation, and more. You can create and use external plugins in the form of executable files or Perl® and shell scripts to monitor and collect metrics from every hardware and software used in a network. Nagios is popular due to its active development community and external plug-in support. Nagios Core is open source and free, and Nagios XI is a commercial tool based on the Nagios Core but with added features. Whatever it doesn’t have can be built, or has been built by the Nagios community.
Network admins like Nagios because it does everything.
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Nagios® is one of the most popular and widely used free network monitoring tools. Many companies used NAGIOS for years and now have migrated to Icinga2. If you have NAGIOS clients already in your systems, the migration is very easy you can continue using same NAGIOS clients as they are like Nagios NRPE, NSClient, etc. Scalable and extensible, Icinga 2 can monitor large, complex environments across multiple locations. Icinga 2 is an open source monitoring system which checks the availability of your network resources, notifies users of outages, and generates performance data for reporting. Or there could be instances when major security flaws aren’t discovered in the auditing process. Immediate custom fixes may not be available unless you spend time developing them.
The second consideration is security, which becomes an issue if your enterprise has strict security guidelines. Features may have to be built with the help of community support or an in-house IT team. Open source requires a significant investment in time and resources to learn, install, configure, and use. Open-source choices are good and can even match commercial tools, but you should know that using open-source monitoring requires a high level of involvement with the tool, which may not suit your needs.
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