Lumion 12 Is Being Prevented From Contacting The License Server Here

Open Command Prompt as Admin and type ipconfig /flushdns , then hit Enter. This clears old connection data.

If you use Norton, McAfee, or Bitdefender, you must manually add the Lumion installation folder to the "White List" or "Exclusions" list. Open Command Prompt as Admin and type ipconfig

Change the file type filter (bottom right) from .txt to . Open the file named hosts . Open Command Prompt as Admin and type ipconfig

Ensure that Port 80 (HTTP) and Port 443 (HTTPS) are open, as these are required for license validation. 🌐 Step 3: Network and Proxy Settings Open Command Prompt as Admin and type ipconfig