How WebRTC Leaks Your IP
To facilitate direct P2P connections, WebRTC must discover your network’s public and local IP addresses. It uses three main mechanisms that can lead to leaks:1. STUN Servers (Session Traversal Utilities for NAT)
STUN servers are used to discover your public IP address and the type of NAT (Network Address Translation) you are behind. When a browser makes a request to a STUN server, the server sends back the IP address it sees. This process often completely bypasses your proxy or VPN setup, communicating directly through your ISP’s gateway.2. TURN Servers (Traversal Using Relays around NAT)
If a direct P2P connection cannot be established, TURN servers act as a relay. While safer than STUN, the initial negotiation phase can still inadvertently expose network details if not handled by a specialized browser like Misubi.3. ICE Candidates (Interactive Connectivity Establishment)
WebRTC collects all possible “candidates” for a connection:- Host candidates: Your local network IP (e.g., 192.168.1.15).
- Server reflexive candidates: Your public IP discovered via STUN.
- Relay candidates: IP addresses of TURN servers.
Why a WebRTC Leak is a “Death Sentence” for Accounts
Modern anti-fraud systems (used by Facebook/Meta, Google, TikTok, and Amazon) don’t just look at your IP; they look for inconsistencies.- The Proxy Mismatch: If your browser IP is from a high-quality residential proxy in New York, but WebRTC reveals a local IP associated with a provider in Berlin, your “Trust Score” drops to zero instantly.
- Hardware Correlation: Local IPs (like 192.168.x.x) might seem generic, but combined with other fingerprint data, they become unique identifiers that link supposedly “separate” profiles.
- The “Stealth” Flag: Websites can detect if you are trying to hide your IP. A WebRTC leak is the most common way they prove a user is using a proxy, which often leads to immediate “Shadow Banning.”
Misubi’s Advanced Protection Levels
Misubi doesn’t just “block” WebRTC (which can itself be a suspicious signal). Instead, it gives you granular control over how the browser presents itself to the world.1. Advanced Masking (Altered Mode)
This is the recommended setting for most users. Misubi intercepts WebRTC API calls and:- Injects Proxy IP: It replaces your real public IP with the IP of your assigned proxy.
- Spoofs Local IP: It generates a plausible, non-conflicting local IP address that matches the expected network environment of your proxy.
- Consistent ICE Candidates: It ensures the ICE candidate list only contains data that matches your spoofed identity.
2. Complete Disabling (Disabled Mode)
For maximum security where voice/video is not required, Misubi can completely strip WebRTC capabilities from the browser engine. To external scripts, it appears as if the browser simply doesn’t support the technology (common in some older or ultra-secure browser builds).3. Manual Configuration
For power users, Misubi allows manually defining which IPs should be reported, allowing for complex network setups or specific testing environments.Comparison: Standard Browser vs. Misubi
| Feature | Standard Browser + Proxy | Misubi (Altered Mode) |
|---|---|---|
| Public IP Detection | Proxy IP | Proxy IP |
| WebRTC STUN Leak | Real IP Exposed | Proxy IP Reported |
| Local IP Exposure | Real Local IP Exposed | Spoofed Local IP |
| Anti-Fraud Detection | High Risk (Mismatch) | Low Risk (Consistent) |
| Ease of Use | Requires complex extensions | Built-in, per-profile |
Best Practices for Users
- Always use “Altered” mode: If you are using proxies, this is the best balance between anonymity and looking like a “normal” user.
- Check your leaks: Use tools like
browserleaks.netorwhoer.netwithin your Misubi profiles to verify that the WebRTC IP matches your Proxy IP. - Consistency is Key: Ensure your Timezone and WebGL metadata also match the location of your proxy for a flawless digital fingerprint.