GrayTech Software, Inc. 


Network License Manager



Brief Description

The Network License Manager (NLM) controls the number of concurrent copies of an application (total 64 users plus three software options) that are licensed to be in use in a local area network. The NLM is a small program, runs as a service and can be installed on a server or a local department workstation.

The administrator installs the NLM as a service with a user command that also makes the required registry entries. The administrator then enters a password from the software manufacturer to secure the NLM and chooses the networks protocol and any event logging. The NLM is then all setup ready for software use. There is a separate program to monitor the number of concurrent users and options checked out.


Key Features

  • The NLM source code (C++) is provided for complete customization and integration of the NLM into your application
  • Distribution of the NLM is royalty free but you may not distribute the source code
  • All network protocols are supported (e.g. TCP/IP ... )
  • The NLM is secured by the computer's MAC address on which it runs
  • More than one NLM can be running in the same network
  • The NLM allows for three options to be checked out in addition to your base program
  • The application maintains a registry entry of the computer where the NLM is running
  • A Key Generator is provided to create an encrypted ID to deliver to the end user which contains the number of licenses and options purchased
  • For crash recovery handling, the NLM is designed to recover in three minutes (adjustable) if it needs to be restarted or unintentionally stopped and then restarted
  • The application checks periodically if it's NLM is running and if not for any reason, gracefully terminates the application.

Contact GrayTech with any questions and request a sample copy of a System Administrator's Guide for the end user.


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NLM with C++ source code 

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