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Nlm11.18.0.0-ipv4-ipv6-win64.msi [portable] May 2026

nlm11.18.0.0-ipv4-ipv6-win64.msi is the installer for Autodesk Network License Manager (NLM)

for 64-bit Windows systems. This utility, based on Flexera's FlexNet Publisher technology, manages product licenses across a network, allowing multiple users to share a pool of licenses. Key Features & Updates Dual-Stack Support

: The "ipv4-ipv6" in the filename indicates this version supports both IPv4 and IPv6 network environments simultaneously. Required for New Software

: Version 11.18 is often a prerequisite for newer Autodesk products (like Civil 3D 2025) or when using the Desktop Licensing Service v12.2

and above. Using an older NLM version can result in "Network License Not Available" errors. Lightweight Performance

: It is a low-resource utility designed to run on a central server without impacting overall server performance. Security Advisory

: Autodesk has previously advised against using the client-server encryption capability in version 11.18 due to identified occasional issues. Components Included The installer sets up the utility, which includes several critical executable files: : The main license daemon. adskflex.exe : The Autodesk-specific vendor daemon. lmtools.exe nlm11.18.0.0-ipv4-ipv6-win64.msi

: The graphical interface for configuring and managing the license service. lmutil.exe

: A command-line utility for license status and troubleshooting. Installation Best Practices Clean Upgrade

: You must uninstall any previous version of the Network License Manager before installing 11.18.0.0. Local Installation

recommends installing the NLM tools on a local drive of the server rather than a network-mapped drive Service Configuration

: For proper operation, ensure "Start Server at Power Up" and "Use Services" are both checked within the LMTOOLS "Config Services" tab.

For more technical details or to find the download, you can visit the Autodesk Network License Manager support page Are you currently encountering a license error or are you planning a server migration for your Autodesk products? To install the Autodesk Network License Manager go to Properties &gt

The file nlm11.18.0.0-ipv4-ipv6-win64.msi is the installer for version 11.18 of the Autodesk Network License Manager (NLM) for 64-bit Windows systems. What is the Network License Manager?

The NLM is a utility used by network administrators to manage software licenses for Autodesk products (such as AutoCAD, Revit, or Maya) within a multi-user environment. It allows a central server to "float" licenses to workstations as needed, rather than assigning a permanent license to each individual computer. Key Features of Version 11.18

Dual Protocol Support: The "ipv4-ipv6" in the filename indicates that the manager supports both IPv4 and IPv6 network protocols.

Windows 64-bit Architecture: Specifically designed for modern 64-bit operating systems, including Windows 10, Windows 11, and various versions of Windows Server.

FlexNet Publisher Core: The NLM is built on Revenera's FlexNet Publisher technology. This version includes critical security updates and bug fixes for the licensing service. Installation and Best Practices

Remove Previous Versions: It is highly recommended to uninstall any older versions of the Network License Manager before running this MSI installer. consider the following:

System Requirements: Ensure your server meets the requirements for Windows 10/11 or Windows Server 2019/2022/2025.

Firewall Configuration: Since this manages network traffic, you must ensure that ports 27000-27009 and 2080 are open to allow communication between the client workstations and the license server.

Download Source: Official downloads should always be obtained directly from the Autodesk Network License Manager Support Page to ensure the file is secure and authentic. Autodesk Network License Manager for Windows

7. Comparison with Previous Versions

| Version | IPv6 Support | Windows 11/2022 | Security Patches | |---------|--------------|----------------|------------------| | 11.14.x | Limited (manual) | No | Outdated | | 11.16.x | Partial | Partial | Some | | 11.18.0.0 | Full dual-stack | Yes | Latest | | 11.19+ (beta) | Full | Yes | Experimental |

Thus, nlm11.18.0.0 represents a stable, production-ready bridge between legacy IPv4 networks and modern IPv6 deployments.

Step 3: Choose Installation Type

File Identity & Version

Security & Safety Check

If you found this file on your computer and do not remember installing it, or if you are an administrator verifying its authenticity, consider the following:

  1. Digital Signature: A "good piece" of advice is to check the digital signature. Right-click the .msi file, go to Properties > Digital Signatures. If it is signed by a legitimate entity (like a corporation or software vendor you recognize), it is safe. If it is unsigned or the signature is invalid, it is suspicious.
  2. False Positives: Because this software interacts deeply with network adapters (to detect location changes), it may sometimes trigger "heuristic" alerts in antivirus software. This does not mean it is a virus, but it does mean the antivirus is being cautious about a program that changes network settings.
  3. Hash Verification: To ensure the file has not been tampered with, you can run the following command in PowerShell to get its unique hash and compare it against a known good source: 
    Get-FileHash "nlm11.18.0.0-ipv4-ipv6-win64.msi"

Summary: If this file was deployed by your IT department or you downloaded it to manage network profiles, it is likely a safe and functional utility. If it appeared out of nowhere, scan it with VirusTotal before running.

6. Common Configuration (Post-install)

To force IPv4-only mode (if issues with IPv6):
Add environment variable: NLM_IPV4_ONLY=1