Architecture & Client Integration
Complete guide to the literal domain infrastructure, Mullvad-style account derivation, Shadowsocks/QUIC protocol layer, and HAPP client subscription setup.
1. Literal Domain Architecture (xxx-xxxx.eu.cc)
The domain xxx-xxxx.eu.cc is the literal, authoritative domain name of the network — not a placeholder or wildcard template. All remote client subscriptions, API routes, and proxy endpoints resolve directly under this host.
http:// schemes with "HTTP insecure scheme is forbidden!". DUPE strictly serves all subscription payloads over TLS/HTTPS with automated SSL certificate provisioning.2. Account Identifier (xxx-xxxx)
DUPE operates on a strict zero-knowledge authentication model inspired by Mullvad. There are no usernames, passwords, emails, phone numbers, or third-party OAuth providers.
[xxx] - [xxxx]
A 3-letter word strictly derived from the official 2048-word BIP39 dictionary, followed by a cryptographically random 4-digit number (0000–9999).
crypto.getRandomValues()
Generated using browser CSPRNG rather than pseudo-random generators, preventing collision and predictability.
Examples of valid accounts: act-4821, age-9037, air-1542, box-7710, cat-2846.
3. Unified Multi-Server Subscription (All-in-One)
Unlike legacy VPN providers that require downloading individual configuration files for each location, DUPE provides one single subscription link that bundles all 5 European nodes simultaneously.
4. Protocol Support: Shadowsocks & QUIC
DUPE deploys dual-stack protocols tailored for censorship resistance, low latency, and zero connection fingerprinting.
Modern Shadowsocks implementation with authenticated encryption with associated data (AEAD). Resilient against active probing and DPI inspection.
- • Cipher: 2022-blake3-aes-128-gcm
- • Fallback: chacha20-ietf-poly1305
- • Port Range: 8443, 9001-9005
UDP-based multiplexed transport protocol designed to overcome severe carrier throttling, network packet loss, and bufferbloat.
- • Transport: UDP Multiplexing
- • Congestion Control: Brutal / BBR
- • Port Range: 443 / UDP
5. HAPP Client Setup Guide
HAPP is a modern cross-platform proxy client for iOS, macOS, Android, and Windows. Follow these steps to import your DUPE subscription in under 30 seconds.
Generate or Log In to Your Account
Visit the DUPE Network Dashboard and click "Generate Account" or enter your existing xxx-xxxx account identifier via "Log In".
Import into HAPP (Choose One Method)
Connect & Verify
All 5 nodes (Austria, Denmark, Finland, Germany, Norway) will appear in your server list. Tap your preferred location and toggle the main power switch.
6. Subscription API Reference
Third-party clients and automated scripts can consume the subscription endpoint directly via standard HTTP GET requests.
# Fetch JSON multi-node configuration curl -s "https://xxx-xxxx.eu.cc/api/sub?account=act-4821&format=json" # Fetch Base64 format for standard subscription readers curl -s "https://xxx-xxxx.eu.cc/api/sub?account=act-4821&format=base64"