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NI License Manager Not Letting Me Login, Needs Internet Access

Updated Jul 25, 2023

Reported In


  • NI License Manager

Issue Details

My personal firewall software keeps detecting that the NI License Manager server (lmgrd.exe and nilm.exe) needs internet access. Why does it need this access? This prevents NI License Manager from letting me log in and activate my software.


If you want to use NI applications or software features that require licensing, such as remote front panels in LabVIEW, the license server must be running because those features are explicitly licensed through the NI License Manager.

If you also run personal firewall software on your computer, you must configure the firewall so the programs nilm.exelmgrd.exe, and lmreread.exe can have access to TCP/IP. These programs do not communicate across the network as they only communicate with each other within the scope of your local computer. More information on this can be found in the Configuring Software and Hardware Firewalls to Support National Instruments Products article. 

If you do not use any NI applications or software features that require licensing, you can stop the NI License Manager from loading when you start your computer. Refer to How to Disable NI Services and Startup Apps article.

Additional Information

If you are using FlexNet to manage your license you will also need to allow lmdown.exe to have TCP/IP access.