The Illusion of Safety: Why VPNs Aren't Stealth
Many users believe that turning on a software VPN makes them invisible. While a VPN is great for encrypting your traffic, it is not designed for stealth. Major platforms like Netflix, Amazon, TikTok, and Stripe can easily detect and bypass software VPNs using two hidden indicators: WebRTC leaks and MTU sizes.
Understanding WebRTC Leaks
WebRTC (Web Real-Time Communication) is a browser protocol that allows fast audio/video streaming directly inside web pages. To establish a fast connection, WebRTC is permitted to bypass standard browser proxy settings. It queries your local router and network card directly, asking for your local IP address.
If you are using a browser proxy extension or a software VPN, WebRTC will often bypass the tunnel and broadcast your actual home IP address to any website you visit. When a script on TikTok or Amazon reads your proxy IP and your real IP side-by-side, it flags your account instantly.
What is MTU, and How Does It Leak?
Maximum Transmission Unit (MTU) determines the maximum size of a packet that can be sent over a network. A standard ethernet or Wi-Fi connection uses an MTU of 1500 bytes.
When you use a VPN, it wraps your data packets inside an extra layer of encryption. To make room for this encryption header, the VPN must shrink the packet size—reducing the MTU to 1420 bytes (or even 1380 bytes). When you visit a website, the server checks the size of the packets it receives. If it sees an MTU of 1420, it knows with 99% certainty that you are using a VPN.
How Onyx Router Achieves Perfect Stealth
A hardware router like the Onyx Router eliminates both of these leaks by managing the network packets before they leave your home:
- Hardware-Layer Masking: Because the router routes traffic directly, the browser on your phone or computer has no knowledge of any proxy software. WebRTC queries the browser, which simply reports the local router address, keeping your real home IP secure.
- Full MTU Packet Optimization: The Onyx Router optimizes network packets to maintain a standard 1500 MTU size, matching a normal mobile device connected to a home or cellular hotspot. There are no tell-tale packet shrinkage indicators.
By shifting the routing from your device to a physical hardware gateway, you achieve true, undetectable digital stealth.