NFSChina NFSCNS 4.0 G340 Trusted Server OS Official ISO Download with Verified SHA-256
If you’re looking for a clean, unmodified, official NFSCNS 4.0 G340 ISO, you’ve come to the right place.
NFSChina (National Fundamental Software of China) is a veteran domestic infrastructure software vendor. Its trusted server operating system (NFSCNS) has long served mission-critical government/enterprise workloads and IT-innovation infrastructure, with deep expertise in security hardening, stability, and the domestic hardware/software ecosystem. 4.0 G340 is an iterative release in this product line. Original images of server systems built for critical business are hard to find through public channels, so a genuine source plus a verifiable hash is the baseline for production deployment.
This post provides the NFSCNS-4.0-G340-x86_64-251205.iso (built 2025-12-05), with a PowerShell-verified SHA-256 hash to guarantee the file you download matches the official release byte-for-byte.
Who Is This Version For?
NFSCNS 4.0 is an enterprise-grade server OS for mission-critical government and enterprise scenarios. Key highlights:
- Developed by NFSChina, deeply rooted in the enterprise and IT-innovation (Xinchuang) market for years
- “Trusted computing” positioning: targeting workloads with high security and stability requirements
- Adapted to domestic databases, middleware, and other infrastructure software ecosystems
- Supports x86 and multiple domestic CPU platforms (this image is x86_64)
- Standard DVD image ships the full package set for offline deployment
Typical use cases:
| Scenario | Description |
|---|---|
| Mission-critical business | Base OS for government, energy, and transportation systems |
| IT-innovation infrastructure | Server OS for integrated domestic hardware/software projects |
| CentOS migration | Smooth replacement for EOL CentOS servers |
| Learning enterprise Linux | Understanding the domestic trusted server ecosystem for ops roles |
File Details
| Item | Details |
|---|---|
| File Name | NFSCNS-4.0-G340-x86_64-251205.iso |
| File Size | 4.12 GB |
| Architecture | x86_64 (64-bit) |
| Version | 4.0 G340 (built 2025-12-05) |
| Image Type | Standard DVD (full package set) |
| Language | Simplified Chinese |
Verified SHA-256 Hash
The following hash was generated locally using PowerShell Get-FileHash on the complete file — not copied from a website. This ensures every byte of your download is identical to the official release:
68050891CB24DD82FECBDA47FC0DD78259C3DFE1198875804691453A22FDB1B2The verified MD5 is:
7F34FF4330CD5E7721BABCA54FD1CD58To verify your download, open PowerShell in the folder containing the ISO and run:
Get-FileHash .\NFSCNS-4.0-G340-x86_64-251205.iso -Algorithm SHA256If the output matches the hash above, your file is intact. If it doesn’t, delete the file and download again.
Download Links
Quark Cloud Drive
Xunlei Cloud Drive
Additional Mirrors
More download mirrors (Baidu Netdisk, Aliyun Drive, Tianyi Cloud, OneDrive) will be added soon. Bookmark this page to get notified when new links are available.
| Platform | Status |
|---|---|
| Baidu Netdisk | Coming soon |
| Aliyun Drive | Coming soon |
| Tianyi Cloud | Coming soon |
| OneDrive | Coming soon |
Before You Install
- Always verify the hash: File corruption during a 4+ GB download is more common than you think. Two minutes of verification saves hours of troubleshooting.
- Check your architecture: This image is for x86_64. For domestic CPU platforms, confirm the corresponding build separately.
- Create a bootable USB: Use Rufus (DD mode) or Ventoy. On server hardware, you can also mount the ISO via BMC / iBMC virtual media.
- Works fully offline: The DVD image ships a complete package repository — a standard installation plus common server components requires no internet connection.
- Production support: As a commercial distribution for critical business, consider NFSChina’s official channels for technical support and updates.
Why “Official Untouched” Matters
A server OS is the foundation of your business. Images from unknown sources may:
- Contain backdoors or hidden remote-access tooling
- Alter package repository configs, poisoning every future update
- Strip security components, failing compliance baselines
- Bundle untrusted preinstalled software
For production environments carrying mission-critical workloads, these risks cost far more than the time saved on a random download. Official ISO + hash verification is always the most reliable path.
Looking for NFSChina Desktop, Kylin, UOS, openEuler, or other official domestic OS ISOs? Leave a comment and we’ll prioritize adding them with verified hashes.