About the UDP protocol

Why UDP support is needed in proxies and how it helps bypass anti-fraud systems

Contents

• How WebRTC detection works

• How to check for WebRTC leaks or WebRTC functionality

• Why a TCP proxy alone is not enough!

• Software solutions for enabling WebRTC

• Why blocking WebRTC does not protect you from detection

• Results of our field tests

• FAQ

Introductory theory

Modern anti-fraud systems are becoming increasingly persistent in identifying your real address or detecting the use of tools that hide your address. Even if you use a proxy or VPN, they can determine that you are not a “real” user by many parameters.

One of the most common detection mechanisms is WebRTC, a technology that can send requests around the proxy and therefore expose your real IP if WebRTC is not blocked by the browser.

The solution? Two-way UDP protocol support in both proxies and software products.

^{This article was inspired by Zl0yTeam_ and their article_ “Why UDP proxies are needed and what WebRTC has to do with it”.}\ ^{It helped us significantly understand how WebRTC works and write this article!}