If you’ve used NordVPN, you’ve probably seen “NordLynx” as a protocol option. But what actually is it, and why did NordVPN build their own protocol instead of just using what already exists?
The short version: NordLynx takes the speed of WireGuard and fixes its privacy problem. Here’s the full story.
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The Problem with WireGuard
Fast but not private enough
WireGuard is a modern VPN protocol that’s incredibly fast — about 4,000 lines of code compared to OpenVPN’s hundreds of thousands. It connects quickly, uses less battery, and provides excellent speeds. Sounds perfect, right?
The problem: WireGuard was designed to keep a permanent link between your identity (public key) and your IP address. For a personal VPN between your own devices, that’s fine. For a commercial VPN service promising no-logs privacy, it’s a dealbreaker — the server would need to remember who you are.
Why NordVPN couldn’t just use WireGuard as-is
| WireGuard feature | Good for speed | Problem for privacy |
|---|---|---|
| Static IP assignment | ✅ Fast reconnection | Server remembers your IP |
| Key-to-IP mapping | ✅ Efficient routing | Could link activity to identity |
| Persistent connections | ✅ Low latency | Session data stored in memory |
How NordLynx Solves This
The double NAT system
NordVPN’s engineers built a “double NAT” (Network Address Translation) system on top of WireGuard. Here’s what it does:
- First NAT layer — Handles the connection between your device and the VPN server
- Second NAT layer — Manages the connection between the VPN server and the internet
This separation means no single component has a complete picture of your connection. Your identity and your browsing activity are kept separate at the server level — so NordVPN can maintain their no-logs policy while still using WireGuard’s speed.
NordLynx vs. Other Protocols
| Protocol | Speed | Security | Privacy for VPN use | Code size |
|---|---|---|---|---|
| NordLynx | Excellent | AES-256 equivalent (ChaCha20) | ✅ Double NAT solves privacy issue | ~4,000 lines |
| WireGuard | Excellent | ChaCha20 | ❌ Static IP mapping | ~4,000 lines |
| OpenVPN | Good | AES-256 | ✅ Dynamic IP assignment | ~600,000 lines |
| IKEv2 | Good | AES-256 | ✅ Dynamic sessions | Complex |
Real-world performance
| Metric | NordLynx | OpenVPN |
|---|---|---|
| Connection time | ~1 second | 5-15 seconds |
| Speed retention | 85-95% | 60-80% |
| Battery impact (mobile) | Minimal | Noticeable |
| Latency added | 10-30ms | 30-80ms |
Should You Use NordLynx?
When to use NordLynx (most of the time)
- Everyday browsing — Fastest option with great security
- Video calls and real-time apps — Lowest latency
- Mobile devices — Best battery efficiency
- Large downloads — Highest throughput
When to consider OpenVPN instead
- Restrictive networks — OpenVPN works on more ports and is harder to block
- Legacy systems — Older devices may not support NordLynx
- Maximum configurability — OpenVPN offers more manual tweaking options
Frequently Asked Questions
Is NordLynx as secure as OpenVPN?
Yes. NordLynx uses ChaCha20 encryption (equivalent strength to AES-256), Curve25519 for key exchange, and Poly1305 for authentication. These are modern, well-audited cryptographic standards. The smaller codebase (~4,000 lines vs. ~600,000) actually makes it easier to audit for vulnerabilities.
Is NordLynx available on all devices?
Yes — NordLynx is available on Windows, macOS, Linux, iOS, and Android. It’s the default recommended protocol on all NordVPN apps.
Can other VPN providers use NordLynx?
No. NordLynx is proprietary to NordVPN. Other providers use standard WireGuard (with their own privacy solutions) or proprietary protocols like ExpressVPN’s Lightway.
Does NordLynx use more data than other protocols?
Actually less. NordLynx’s efficient design means lower overhead per packet compared to OpenVPN. You’ll use slightly less data for the same browsing activity.
Conclusion
NordLynx exists because WireGuard was fast but not private enough for a commercial VPN. NordVPN’s double NAT system keeps WireGuard’s speed while fixing the privacy problem. For most users, NordLynx is the best protocol choice — it’s faster, uses less battery, connects quicker, and provides the same level of security and privacy as older protocols.
NordVPN with NordLynx starts at $3.39/month.
