If you are using Windows Defender, you should see a pop up which will ask if LightBurn can use the port. Please refer to your routers documentation for further details. If you have a hardware based router firewall, you will have to set it as a port forward in the hardware exception list. If you are on a school network, please forward a link to this page to your IT department and ask that they whitelist the above.

If you receive an alert when attempting to enter your license key stating LightBurn was unable to connect to the server, please ensure the following is set up on your network Whitelist for port 443 On some systems/networks (particularly school networks) there can be firewall/security settings preventing applications from connection to the network. In order to validate your license, LightBurn needs to connect to the LightBurn license server. Lightburn is unable to connect to the license server: Note: The Command Line / Terminal steps listed allow LightBurn to retain and validate the license automatically each time this is required. This can occur if you have a ‘floating’ type license (non-standard) but have not performed the correct license installation steps, which can be found here: LightBurn Software: How to Install a Floating Licence If it’s not already set, turn on the ‘ Set time automatically‘ switch also.Īsked to enter key each time LightBurn is opened:.In the Date & Time window, click the button to make sure your computer time match network time.Right-click the T ime/D ate on the task bar.To resolve this on a Windows machine, please follow the steps below:.If your computers time and/or date have not been synced, you may encounter the following error: Your clock is wrong or the TIME has been tampered with. Using a computer not connected to the Internet.LightBurn is unable to connect to the license server.Asked to enter the license each time LightBurn is opened.This article contains the following sections: If you are experiencing an error when you enter your LightBurn license key, or are being asked for your key each time you open LightBurn, please check the relevant steps below:

Lightburn license key