UDP Proxies and the QUIC Protocol: How Real IP Addresses Leak

The article addresses a critical security issue faced by users of anti-detect browsers and multi-accounting tools. The primary threat stems from improper handling of UDP traffic: if the software does not support the UDP protocol or fails to properly control network routes, the user's real IP address can be exposed. Special attention is given to the QUIC protocol, which is widely used by modern browsers and often bypasses standard proxy settings. The author explains the technical mechanisms behind these leaks and emphasizes that the lack of UDP support renders anonymization efforts ineffective. The article urges developers and users to be more diligent with network stack configurations and the selection of privacy tools to prevent de-anonymization while browsing.