Firewall settings for Lightning licenses

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When Lightning starts up, it connects to our license provider to see if you can use the product. This happens when you:

  • Request a trial license
  • Activate a license
  • Check out / check in a license

If you get an error message about your internet connection, that could mean two things:

  1. You really have no internet connection.
  2. A firewall blocks the request to our license provider.

If your internet connection works correctly, you need to add a few exceptions to your firewall. Please allow connections over port 443 to these IP addresses:


If adding these exceptions does not fix your issue, please check out How to fix license issues.