About the UDP protocol

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

Contents

• How detection via WebRTC works

• What can be used to check for a leak or the functionality of WebRTC

• Why a simple TCP proxy is not enough!

• Software solutions for enabling WebRTC

• Why blocking WebRTC does not protect against detection

• Results of our field tests

• FAQ (Frequently Asked Questions)

Introductory theory

Modern anti-fraud systems are becoming increasingly insistent about determining your real address or detecting the use of tools to 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 has become WebRTC, a technology that can send requests bypassing the proxy and thereby “reveal” your real IP if it is not blocked WebRTC by the browser.

The solution? Two-way support for the protocol UDP on the proxy and in software products

^{The source of inspiration was an article by Zl0yTeam. The article “Why proxies with UDP are needed and what WebRTC has to do with it”.}\ ^{It helped us greatly understand how WebRTC works and write this article!}