Flexible License Manager

FLEXlm, or Flexible License Manager, is a software license management tool used to control and monitor the usage of software licenses. It ensures that only authorized users can access the software, helping organizations comply with licensing agreements. FLEXlm is widely used in various industries to manage licenses for software applications.

What is Flexible License Manager

FLEXlm, also known as Flexible License Manager, is a software license management solution developed by Globetrotter Software, which was later acquired by Macrovision and then Flexera Software. The primary purpose of FLEXlm is to provide a centralized system for managing software licenses, ensuring that only authorized users can access the licensed software. This helps organizations comply with licensing agreements and avoid legal issues related to software piracy.

FLEXlm operates by using a license server that distributes licenses to client machines. When a user attempts to run a licensed application, the application communicates with the license server to check out a license. If a license is available, the server grants access; otherwise, the user is denied access. This system allows organizations to optimize their software usage and reduce costs by sharing licenses among multiple users.

FLEXlm is widely used across various industries, including engineering, design, and software development, where managing multiple software licenses is crucial. The service supports a wide range of software applications, making it a versatile solution for license management. Over the years, FLEXlm has evolved to include features such as license borrowing, usage reporting, and license recovery, further enhancing its utility for organizations.

Flexible License Manager runs on TCP and UDP port 744 and is official IANA port.

Security risk

If port 744 is open and the FLEXlm service is running, unauthorized users could potentially exploit the service to gain access to software licenses. This could lead to license overuse, legal issues, and financial losses for the organization. Additionally, an open port could be a vector for cyber-attacks, compromising the security of the network.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 744. Use StackChanges to monitor if the Flexible License Manager port is closed and stays closed. StackChanges will send an alert if port 744 is open again.