Download opFlow

Opmantek’s opFlow module allows you to break down network usage by device, user, process and more to identify the source of any performance issues.

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Quick Setup

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Please note that NMIS must be installed on the your machine before opFlow or most other Opmantek Modules. Please ensure you have installed NMIS before installing opFlow. NMIS is the underlying software required to run any of Opmantek’s individual modules, and can be installed on Linux. If you do not have a machine currently running Linux, you can download and install the Opmantek Virtual Machine, which includes NMIS and all Opmantek software modules. The following installation guide should be sufficient for most users’ needs. Advanced instructions and troubleshooting are available on the opFlow Wiki.

Download the opFlow installer

If you haven’t already, hit the download button above and download the opFlow Installer. The Installer comes as a .run file.

Run the Installer in Linux Terminal

Open the Linux Terminal. Start a Terminal instance as the root user through the following command, entering your password when prompted: sudo -i If you have not been granted access to the root user, contact your system administrator. Once your terminal session is run by the root user, run the shell command to begin the installation process

 sh /…/opFlow-<version number>.run 

Press Y or Return/Enter when the installer prompts you. Several times throughout the installation process you will be prompted to approve the various components of the opFlow Module as they are installed on your machine. Please take note of any relevant information as you approve each step. When the installation is complete, the following will print on the Terminal:

NMIS Guide 1 - 700


You’re now ready to configure opFlow.



Open opFlow

opFlow allows you to explore the details of the network which you have configured in NMIS. You can use opFlow to improve visibility and maintain consistency across your whole IT environment through advanced tracking of device and network configuration settings.

Explore Opmantek’s extensive software documentation

You’re now ready to configure opFlow to exactly your needs and to begin discovering devices on your network using the guides on the Opmantek Wiki. In no time at all, you’ll have a fuller view of your network than you’ve ever had before.


The opFlow module offers several licencing options:

  • A full-featured 30-day trial
  • Competitive pricing for larger networks of all different sizes
  • A free licence for 20-node networks

If you already have a licence key, simply enter it to activate the module. Otherwise, please follow the instructions below to acquire a trial licence.

Open the Opmantek Applications Homepage

This can be found by accessing the host machine on which you set up opFlow. If you’re accessing the software on the same machine the address will be localhost/omk. If you are using a different machine, use <IP_OR_hostname>/omk to connect. You can find your host machine’s IP address in Network Settings.

Select opFlow Module

From the list of applications on this page, select opFlow. This will open up licencing options.

Request a Trial Licence

To get a free, fully-featured trial licence, click the first option on the licencing page: Get a Free Trial License from

Log in to your Opmantek account

If you haven’t got an Opmantek account, you can also register on this page for free.

Request trial licences

Once you log in, you will be given the option to request trial licences for a number of Opmantek products. Select the modules you wish to trial in order to receive your licence keys. These keys will be long strings that you will need to copy into the Modules in order to activate them for your use.

Enter your licence key into the Module

Return to the opFlow Module and enter the licence key. You can try typing it manually, but we recommend cut-and-paste.

Begin using opFlow!

Congratulations—all being well, you should now be on the opFlow landing page. You’re ready to start using the software.