Topic
VLESS
Understanding Russia's TSPU: How DPI Filtering, DNS Manipulation and Traffic Throttling Work
Privacy & SurveillanceFollowing the White Rabbit: Developer Builds Custom Rust VPN PAYPHONE Using QUIC and Obfuscation to Evade Detection
Privacy & SurveillanceHydrat Project Builds Automated WireGuard Gateway for Resilient VLESS and Tor Routing
Privacy & SurveillanceAmnezia VPN Survives Coordinated Russian Censorship Campaign Targeting AmneziaWG Protocol Fingerprints
Amnezia VPN has published a detailed post-mortem on the multi-wave blocking campaign conducted by Russian authorities against its Amnezia Free and Amnezia Premium services during June and July. The company describes a shift from simple protocol blocking to sophisticated fingerprinting of AmneziaWG traffic combined with infrastructure DDoS attacks and automated IP-subnet blacklisting. Engineers closed multiple detection vectors including zero-length UDP packets, fixed-size keepalive messages, handshake timing patterns, and nonce zero bytes. The incident forced accelerated migration to AmneziaWG 2.0, discontinuation of legacy client support, and development of AmneziaWG 3.0 while expanding VLESS infrastructure as a backup. Self-hosted users largely avoided direct protocol blocks but still faced subnet-level restrictions. The report highlights how Roskomnadzor now applies cumulative scoring across multiple traffic features rather than single definitive markers.
VPN Encryption Alone Cannot Hide Traffic from Network Detection Systems
A Habr user known as mr_tom detailed why encrypted VPN connections remain detectable despite their encryption. Observers can identify connections through visible metadata such as server IP addresses, ports, transport protocols, handshake patterns, packet sizes, timing intervals, and overall flow behavior. Simple DPI systems block traffic by restricting known IPs or ports, while advanced filters build traffic fingerprints and use active probing to verify suspicious endpoints. The popular combination of VLESS, XHTTP, and REALITY operates across different layers rather than functioning as three equivalent VPN protocols. Even traffic on port 443 can be distinguished from standard HTTPS by analyzing handshake details and subsequent packet behavior. The core conclusion is that no universally unblockable VPN exists, as detection can rely on IP blocking, new signatures, or active verification regardless of encryption strength.
Configuration Drift Silently Breaks Multi-Hop Chains in sing-box Reality Fleet
A post-mortem analysis of a censorship circumvention network using sing-box and Reality revealed that four out of seven nodes were unreachable due to outdated allowlists, even though all monitoring reported green status. The fleet consisted of 14 endpoints across seven machines and four providers, with traffic routed in two hops where entry nodes only knew client identities and exit nodes only knew destinations. White-list rules on entry nodes permitted only five addresses instead of all required relays, causing urltest to silently discard most chains without logging failures. Canary checks, external probes, and the relay-lockdown.sh script all passed because none compared the allowlist against the full signed configuration. Two private paid nodes lacked any route section entirely, exposing them to potential abuse. The issue stemmed from configuration drift over time, with no single person maintaining an overview of the entire system. Automated fixes were implemented with safeguards to prevent fleet-wide lockouts.