If you are running multiple accounts, a 'green' status on
an IP checking
site isn't enough. You need to understand what is leaking and why.
1. What is WebRTC Leak?
WebRTC is a browser protocol for real-time communication (voice/video).
- Impact: Websites see two different IPs—your Proxy IP and your Real IP.
- The Giveaway: It reveals you are masking your identity. Instant flag for platforms like eBay, Etsy, or Facebook.
2. What is DNS Leak?
What it is: DNS (Domain Name System) translates a URL (https://www.google.com/search?q=google.com) into an IP address.
The Leak: By default, your computer asks your ISP’s DNS servers for this translation. When you use a proxy/VPN, your traffic might go through the proxy, but the DNS request still goes to your
Local ISP.
- Impact: The website might see your Proxy IP (e.g., US), but the DNS requests are coming from your home country (e.g., Vietnam).
- The Giveaway: It reveals your true geographic location.
3. WebRTC Leak vs DNS Leak: Key differences
| Feature | WebRTC Leak | DNS Leak |
| Origin | Browser-level (API/Protocol) | System-level (Network settings) |
| Protocol | Mostly UDP | DNS queries (Port 53) |
| Information | Reveals Local & Public IP | Reveals ISP & Country |
| Detection | JavaScript can trigger this | Checked by monitoring DNS requests |
4. How to Fix them?
4.1. For WebRTC Leaks
To fix a WebRTC leak, you can refer to the following three methods:
- Using antidetect browser: Modern anti-detect browsers all feature capabilities that allow you to spoof your WebRTC IP to perfectly match your proxy IP.
- Disable WebRTC: (Not recommended for high-stealth) Turning it off completely in Chrome/Firefox flags makes you look like a bot.
- Use UDP proxies: Most cheap SOCKS5 proxies don't support UDP, which is why WebRTC leaks occur. Use high-quality providers that support full UDP tunneling.
4.2. For DNS Leaks
To fix a DNS leak, you can refer to the following three methods:
- Hardcode DNS: Change your network adapter settings to use Public DNS (Google 8.8.8.8 or Cloudflare 1.1.1.1) instead of your ISP's.
- Force DNS through Proxy: Ensure your browser/tool is configured to resolve DNS remotely (on the proxy side) rather than locally.
- VPN Killswitch: If using a VPN, ensure "DNS Leak Protection" is toggled on.
In conclusion:
- WebRTC Leaks reveal WHO you are (your exact IP).
- DNS Leaks reveal WHERE you are (your ISP/Location).
I hope this insight helps. DNS leaks and WebRTC leaks can seriously impact your accounts, especially if you’re managing multiple accounts on the same device. Taking the time to understand how they work and how to fix them will give you a much stronger setup and reduce the risk of detection.