file is a protected system file located deep in your Windows directory. In Notepad, go to File > Open Paste the following path into the address bar at the top: C:\Windows\System32\drivers\etc\
Change the file type filter in the bottom-right corner from "Text Documents ( .txt)" to **All Files ( .*)** to see the file named Select the file named (ensure it is NOT ) and click Step 3: Remove Lumion Entries
Lumion checks for specific domain redirects that are often used to bypass official license checks. Scan the text for any lines containing the word Example of a problematic entry: 127.0.0.1 backup.lumion3d.net Delete all lines that mention Lumion. File > Save
If you cannot save directly, save the file to your desktop as (with no extension), then manually move it into the folder to replace the original. Step 4: Configure Antivirus & Firewall Exclusions After cleaning the
file, ensure your security software isn't still blocking the connection. Antivirus: Lumion 2023 Host File Entries Detected
Add an exclusion for the Lumion installation folder (usually C:\Program Files\Lumion 2023 Lumion.exe Lumion.exe is allowed through the Windows Defender Firewall and has access to ports Restart your computer
after these changes to ensure all network configurations are refreshed. graphics card meets the requirements for Lumion 2023 after these fixes? How do you resolve antivirus and firewall problems?
Here’s a sample content piece you can use for a knowledge base article, error alert, or support message regarding "Lumion 2023 Host File Entries Detected."
To understand the error, you must first understand the Windows "Hosts" file. file is a protected system file located deep
The Hosts file is a local text file on your computer that maps hostnames (like www.lumion.com) to IP addresses. It acts as a local directory that your computer checks before asking a public DNS server on the internet.
The error message implies that the Lumion installer or launcher has found entries inside your Hosts file that block Lumion from connecting to its license validation servers.
Warning: Editing system files carries a small risk. Proceed carefully. Additionally, if you are in a corporate environment, consult your IT administrator before making changes.
If the error persists after editing:
ipconfig /flushdns to clear any cached network data.A standard Windows Hosts file usually looks mostly empty (lines starting with # are comments).
Look for lines that do not start with a # and contain keywords like Lumion, Act-3D, or License.
They will typically look like this:
127.0.0.1 lumion.com
127.0.0.1 www.lumion.com
127.0.0.1 activation.lumion.com
127.0.0.1 backend.lumion.com
Action: Delete these specific lines. If you are unsure, you can compare your file to a default Windows Hosts file template found online. What Does This Mean