| Problem | Likely Cause | Solution |
|---------|--------------|----------|
| Clients cannot check out licenses | Firewall blocking IPv6 traffic | Add explicit allow rules for TCP ports over IPv6. |
| License server shows “No IPv6 route” | IPv6 stack disabled on Windows | Enable IPv6 in network adapter properties. |
| Service fails to start | Corrupt license file or missing vendor daemon | Run lmutil lmstat to diagnose. |
Summary: It is a legitimate Microsoft system file, but it is essentially "digital clutter" for a standard user. You can delete the file without harming your system. nlm11.18.0.0-ipv4-ipv6-win64.msi
| Scenario | Behavior | |----------|----------| | IPv4 only | Works normally | | IPv6 only | Works normally | | Dual stack (IPv4+IPv6) | Listens on both; prefers IPv6 if client supports it | | IPv4-mapped IPv6 | Disabled by default (can be enabled via config) | | Problem | Likely Cause | Solution |
Note: License manager hostname resolution must resolve to both A and AAAA records for full dual-stack support. | Scenario | Behavior | |----------|----------| | IPv4
File:
nlm11.18.0.0-ipv4-ipv6-win64.msi
Type: Windows Installer package (MSI)
Version: 11.18.0.0
Architecture: 64-bit
Network Support: IPv4 + IPv6 dual stack
Primary use: [Assumed] NLM (Network License Manager) – likely from a software vendor like FlexNet, Dassault, ESRI, or similar.
Verdict: This appears to be a legitimate, albeit niche, network utility installer. It is not standard Windows software or a widely known commercial antivirus, so it should be treated with caution if found unexpectedly.
Detailed Breakdown: