Nagios is an open source computer system monitoring, network monitoring and infrastructure monitoringsoftware application. Nagios offers monitoring and alerting services for servers, switches, applications, and services. It alerts the users when things go wrong and alerts them a second time when the problem has been resolved.

 

Network Management

 

Nagios  is an open source computer system monitoring, network monitoring and infrastructure monitoringsoftware application. Nagios offers monitoring and alerting services for servers, switches, applications, and services. It alerts the users when things go wrong and alerts them a second time when the problem has been resolved.

Nagios, originally created under the name NetSaint, was written and is currently maintained by Ethan Galstad along with a group of developers who are actively maintaining both the official and unofficial plugins. Nagios is a recursive acronym: "Nagios Ain't Gonna Insist On Sainthood",[3] 'Sainthood' being a reference to the original name NetSaint, which was changed in response to a legal challenge by owners of a similar trademark.[4] 'Agios' is also a transliteration of the Greek word άγιος which means 'saint'.

Nagios was originally designed to run under Linux but also runs well on other Unix variants. It is a free softwarelicensed under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

In 2006, a survey among the nmap-hackers mailing list asked people what their favorite network security tools were. In the survey 3243 people voted; Nagios came in 67th overall and 5th among traffic monitoring tools. Nmap itself was excluded from the list. Another survey, in 2011, placed Nagios at 69th place.[5]

 

 

Nagios is open source software licensed under the GNU GPL V2. It provides:

  • Monitoring of network services (SMTP, POP3, HTTP, NNTP, ICMP, SNMP, FTP, SSH)
  • Monitoring of host resources (processor load, disk usage, system logs) on a majority of network operating systems, including Microsoft Windows with the NSClient++ plugin or Check MK.
  • Monitoring of anything else like probes (temperature, alarms,etc.) which have the ability to send collected data via a network to specifically written plugins
  • Monitoring via remotely run scripts via Nagios Remote Plugin Executor
  • Remote monitoring supported through SSH or SSL encrypted tunnels.
  • A simple plugin design that allows users to easily develop their own service checks depending on needs, by using their tools of choice (shell scripts, C++, Perl, Ruby, Python, PHP, C#, etc.)
  • Available data graphing plugins
  • Parallelized service checks
  • The ability to define network host hierarchies using 'parent' hosts, allowing the detection of and distinction between hosts that are down or unreachable
  • Contact notifications when service or host problems occur and get resolved (via e-mail, pager, SMS, or any user-defined method through plugin system)
  • The ability to define event handlers to be run during service or host events for proactive problem resolution
  • Automatic log file rotation
  • Support for implementing redundant monitoring hosts
  • An optional web-interface for viewing current network status, notifications, problem history, log files, etc.
  • Data storage via text files rather than database

 

 

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