If you're unsure about which entries are causing the issue, you can reset your host file to its default state. This will remove all custom entries, so use this method with caution.
Lumion 2023, developed by Act-3D B.V., includes sophisticated anti-piracy and license validation mechanisms. When Lumion starts, it performs a routine check of your system’s hosts file.
The error appears because Lumion has scanned the hosts file and found entries that block Lumion’s official license validation servers.
Specifically, Lumion looks for lines that redirect its activation servers (like license.lumion3d.com or backup.lumion3d.com) to a dead IP address, typically 127.0.0.1 (localhost) or 0.0.0.0. Lumion 2023 Host File Entries Detected
Less commonly, aggressive firewall rules or anti-malware tools may add entries to your hosts file to "quarantine" suspicious domains. If a security program mistakenly flags Lumion’s activation servers as malicious, it might redirect them to localhost.
| User Type | Verdict | |-----------|---------| | Paying customer | Minor annoyance if you’ve edited hosts for other reasons. Easy fix. | | Trial user | Should not appear unless you tampered with hosts. | | User of cracked version | The message is working as intended — it blocks the crack method. No legitimate workaround exists. |
Overall rating as an anti-piracy measure: ⭐⭐⭐⭐ (4/5) – Effective, minimally intrusive for legit users, but could offer more detailed guidance on which entries to remove. If you're unsure about which entries are causing
If you encountered this message unexpectedly and do own a valid license, check if any third-party software (like an ad blocker or security suite) modified your hosts file automatically.
Here’s a ready-to-use post for forums, community boards, or internal IT documentation regarding the “Lumion 2023 Host File Entries Detected” message.
This typically occurs if:
A standard Windows hosts file usually looks like this (with # symbols at the start of active lines):
# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# localhost name resolution is handled within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost
If you see lines that do not start with a # and reference "Lumion," they must be removed. Look for entries that look like this:
127.0.0.1 lumion.com
127.0.0.1 backend.lumion.com
127.0.0.1 license.lumion.com
0.0.0.0 www.lumion.com
Action: Delete any lines that contain the word "Lumion." This typically occurs if: A standard Windows hosts