Show HN: 404 – a localhost proxy that substitutes your device fingerprint

Category: security

Tags: privacy, fingerprinting, proxy, rust, ebpf, tls

Score: 6.8/10 (Innovation: 7, Technical: 8, Documentation: 7, Utility: 5)

404 is a privacy-focused localhost proxy that provides granular control over device and browser fingerprinting by manipulating TCP/IP options, TLS parameters, HTTP headers, and browser APIs. It combines a Rust-based TLS-terminating proxy with a Linux eBPF kernel module for low-level network packet mutation, offering a technically sophisticated approach to online anonymity.

Target audience: security researchers, privacy-conscious users, developers testing fingerprinting resistance

Repository: https://404privacy.com/ · Rust · AGPL-3.0 · 79 stars

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