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 What is NMIS?

NMIS (acronym for Network Management Information System) is an open-source network management system that was first released in 1998. Originally written by Keith Sinclair and with later substantial input from Eric Greenwood, the intellectual property for NMIS was purchased by commercial open source software company Opmantek in early 2011 under a stated commitment to keep "NMIS free and lead the community to rapidly advance the product". NMISv8 was released by Opmantek shortly after and remains free and open source. NMISv9 is currently (as at April, 2020) in the final stages of development. NMIS s a complete network management system which assists with fault, performance and configuration management, providing performance graphs and threshold alerting as well as highly granular notification policies with many types of notification methods.

Additional modules and support provided by Opmantek are available to extend the capabilities of NMIS.

What does NMIS do?

NMIS monitors the status and performance of an organization's IT environment, assists in rectification and identification of faults and provides valuable information for IT departments to plan expenditure and IT changes.


Blog Posts



NMIS is available as a stand-alone download or part of the Opmantek virtual appliance.

Release Notes.


NMIS 8 Installation Guide

NMIS 9 Installation Guide

Getting Started

NMIS8 - A Quick Getting Started Guide

NMIS8 Common Settings to Consider Adjusting

Getting Started with Opmantek Applications

Opmantek Virtual Appliance: Installation and Getting Started



What is NMIS?

More information about Opmantek and our products and services available on our website.


These detailed guides, webinars, and blogs break down configuring NMIS into manageable tasks and sub-tasks. These guides are designed to be followed after you have installed NMIS and confirmed it is operating.


Building upon the success of NMIS 8, Opmantek’s NMIS 9 will be released in July 2020. We’re just going through the finalisation of the product right now.

Some of the enhancements include:

  • open data using MongoDB
  • improved I/O
  • improved scheduling
  • handling a larger node count
  • more responsive interface

Perfect for your Network Engineering needs.

To build Opmantek's Automated Network Management Platform, add the latest commercial modules to leverage and enable access to even more functionality. To list a few: complete scalability through multi-server architecture, centralised node management, complete flexibility, centralised poller configuration management, improved charts, Improved inventory reports, new maps library, JSON APIs and more. All via a single platform.

We're excited to bring this product to you.

And a HAT TIP to all who participated in the beta program - thanks guys!

NMIS v8 Documentation

Current NMIS v8 documentation is listed below.

NMIS in Depth

Why does NMIS do that, how does it work?

NMIS Troubleshooting & Micro FAQ

NMIS Training

Opmantek has training material available for NMIS, this is available in PDF format, and includes a movie which is about an hour long for the NMIS Device Modelling Training.  All this downloadable:

NMIS Support

Old patching

NMIS4 Documentation

Other Resources for NMIS Users

Opmantek Modules to Extend NMIS8

  • opFlow - Application level visibility using NetFlow information, providing incredible visibility into bandwidth usage, by user and application.
  • opReports - Expert reporting, with traffic lights and actions.
  • opMaps - Geographical mapping of your Organisation, from NMIS information.
  • opSLA - Enhanced IPSLA engine for 10000's of IPSLA probes on a single server.
  • opHA - High availability for NMIS through Master/Poller and Multi-Master configurations.
  • opConfig - Automatically track and back up configurations. Compare configurations.
  • opCharts - Modern, dynamic, interactive charting, custom dashboards and a RESTful API for all NMIS data and more. 

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