VLESS-Reality-Vision:
The 2026 Secure Standard

1. Quick Summary — What Is This?

2. How Does Reality-Vision Work?

The release of Xray-core v26.2.4 in February 2026 introduced the "Reality-Vision" framework — a major architectural overhaul designed to defeat the GFW's AI-driven TLS fingerprinting.

The "Reality" Layer: Certificate Stealing

Unlike standard proxies that present a detectable certificate, a REALITY server acts as a sophisticated man-in-the-middle for a legitimate, high-reputation target website. When the GFW's censor probes the server, the server fetches a genuine "Server Hello" from the target (e.g., Apple.com) and passes it to the prober. The circumvention client authenticates via a private key embedded in modified handshake fields that remain invisible to the prober.

The "Vision" Layer: Killing TLS-in-TLS

The xtls-rprx-vision flow control addresses a subtler problem. AI-driven models in 2026 look for the specific packet length distributions and timing intervals associated with nested TLS tunnels — the "TLS-in-TLS" problem. Vision mitigates this through dynamic padding and automatic adaptation to network conditions, ensuring packet sizes don't follow the predictable patterns of encapsulated protocol handshakes.

3. What Infrastructure Do You Need?

The success of a REALITY deployment depends on your VPS's network reputation and hardware. In February 2026, the preference has shifted toward high-performance AMD EPYC or Ryzen architectures to handle the cryptographic intensity of TLS 1.3 handshakes.

4. How Do You Configure X-UI?

The following JSON configuration is designed for X-UI (or 3x-ui) panels, integrating the latest REALITY and Vision settings. Replace the placeholder values with your own credentials.

{
  "port": 443,
  "protocol": "vless",
  "settings": {
    "clients": [
      {
        "id": "YOUR-UUID-HERE",
        "flow": "xtls-rprx-vision",
        "email": "[email protected]"
      }
    ],
    "decryption": "none"
  },
  "streamSettings": {
    "network": "tcp",
    "security": "reality",
    "realitySettings": {
      "show": false,
      "dest": "www.apple.com:443",
      "xver": 0,
      "serverNames": [
        "www.apple.com",
        "apple.com"
      ],
      "privateKey": "YOUR_PRIVATE_KEY",
      "shortIds": [""]
    }
  },
  "sniffing": {
    "enabled": true,
    "destOverride": ["http", "tls", "quic"]
  }
}

4.5. Complete Server Installation (Copy-Paste Ready)

Step 1: Install Xray-core

# SSH into your VPS
ssh root@your-vps-ip

# Install Xray-core (official script)
bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ install

# Verify installation
xray version
# Should show: Xray 1.8.x (Xray, Penetrates Everything.) or newer

Step 2: Generate X25519 Keys

# Generate private/public key pair
xray x25519

# Output will look like:
# Private key: gKFJqmBjRWRlQjg5N0M4M2U3NjQwNzE4MWU3NTY0NzA=
# Public key: yN0M3U1M2E3NjQwNzE4MWU3NTY0NzBnKFJqbUJqUldSb=

# SAVE BOTH - you'll need them in config

Step 3: Generate Client UUID

# Generate UUID for client authentication
cat /proc/sys/kernel/random/uuid

# Example output: 7f8e6d9c-4a3b-2e1f-9c8d-7e6f5a4b3c2d
# SAVE THIS - it's your client ID

Step 4: Create Server Config

Edit /usr/local/etc/xray/config.json with this complete configuration:

{
  "log": {
    "loglevel": "warning"
  },
  "inbounds": [{
    "port": 443,
    "protocol": "vless",
    "settings": {
      "clients": [{
        "id": "7f8e6d9c-4a3b-2e1f-9c8d-7e6f5a4b3c2d",  // Replace with YOUR UUID
        "flow": "xtls-rprx-vision",
        "email": "[email protected]"
      }],
      "decryption": "none"
    },
    "streamSettings": {
      "network": "tcp",
      "security": "reality",
      "realitySettings": {
        "show": false,
        "dest": "www.apple.com:443",  // Target website (apple, microsoft, cloudflare work best)
        "xver": 0,
        "serverNames": [
          "apple.com",
          "www.apple.com"
        ],
        "privateKey": "gKFJqmBjRWRlQjg1N0M4M2U3NjQwNzE4MWU3NTY0NzA=",  // Replace with YOUR private key
        "shortIds": [""]  // Leave empty or add 2-8 character hex
      }
    },
    "sniffing": {
      "enabled": true,
      "destOverride": ["http", "tls", "quic"]
    }
  }],
  "outbounds": [{
    "protocol": "freedom",
    "tag": "direct"
  }, {
    "protocol": "blackhole",
    "tag": "block"
  }],
  "routing": {
    "rules": [{
      "type": "field",
      "ip": ["geoip:private"],
      "outboundTag": "block"
    }]
  }
}

Step 5: Start Xray Service

# Test config syntax
xray run -c /usr/local/etc/xray/config.json -test

# If no errors, start service
systemctl start xray
systemctl enable xray  # Auto-start on boot

# Check status
systemctl status xray
# Should show: active (running)

# View logs if needed
journalctl -u xray -f

Step 6: Client Configuration (V2RayN / Hiddify)

Save this as client-config.json or paste into V2RayN:

{
  "log": {
    "loglevel": "warning"
  },
  "inbounds": [{
    "port": 10808,
    "protocol": "socks",
    "settings": {
      "udp": true
    }
  }],
  "outbounds": [{
    "protocol": "vless",
    "settings": {
      "vnext": [{
        "address": "YOUR-VPS-IP",  // Replace with your VPS IP address
        "port": 443,
        "users": [{
          "id": "7f8e6d9c-4a3b-2e1f-9c8d-7e6f5a4b3c2d",  // Same UUID as server
          "encryption": "none",
          "flow": "xtls-rprx-vision"
        }]
      }]
    },
    "streamSettings": {
      "network": "tcp",
      "security": "reality",
      "realitySettings": {
        "fingerprint": "chrome",  // Mimic Chrome browser TLS fingerprint
        "serverName": "www.apple.com",  // Must match server config
        "publicKey": "yN0M3U1M2E3NjQwNzE4MWU3NTY0NzBnKFJqbUJqUldSb=",  // Server's PUBLIC key
        "shortId": "",
        "spiderX": "/"
      }
    }
  }],
  "routing": {
    "rules": [{
      "type": "field",
      "ip": ["geoip:private"],
      "outboundTag": "direct"
    }]
  }
}

Step 7: Test Connection from China

# Test with curl (assuming client running on localhost:10808)
curl -x socks5h://127.0.0.1:10808 https://www.google.com -I

# Should return: HTTP/2 200
# If you see this, congratulations - you've bypassed the GFW!

# Test latency
ping -c 5 YOUR-VPS-IP
# Should be 50-200ms depending on VPS location (HK best for China)

5. How Do You Set Up the Client?

Your client must mirror a standard browser to pass AI-driven DPI. As of February 2026, the updated uTLS library allows precise fingerprinting of modern browsers.

Recommended Client Apps

uTLS Browser Fingerprints

6. What Is the 5G Optimization Hack?

On 5G networks, the GFW often intentionally disrupts Path MTU Discovery (PMTUD), leading to packet fragmentation and drops. This creates the "infinite loading" loop that plagues mobile VPN users.

# Apply kernel-level TCP window scaling
sysctl -w net.ipv4.tcp_window_scaling=1

# Adjust tunnel MTU on client (critical for 5G)
ip link set dev tun0 mtu 1350

# For IPv6 networks, use 1280 instead
ip link set dev tun0 mtu 1280

7. How Does the Handshake Beat the GFW?

The following diagram shows the difference between a VLESS-Reality handshake (which passes inspection) and a standard VPN handshake (which gets blocked).

sequenceDiagram
    participant Client as 📱 Client (V2RayN)
    participant GFW as 🔥 GFW Inspector
    participant Server as 🖥️ VLESS Server
    participant Apple as 🍎 apple.com

    Note over Client,Apple: VLESS-Reality Handshake

    Client->>Server: ClientHello (SNI: apple.com)
    GFW->>GFW: Inspect SNI → "apple.com" ✓
    Server->>Apple: Fetch ServerHello
    Apple-->>Server: Real TLS Certificate
    Server-->>Client: ServerHello (apple.com cert)
    GFW->>GFW: Valid cert chain ✓

    Note over Client,Server: Secret key auth in modified fields
    Client->>Server: Authenticated tunnel established
    GFW->>GFW: Looks like normal HTTPS ✓

    Note over GFW: GFW sees: legitimate Apple traffic
    Note over Client,Server: User sees: unrestricted internet

    rect rgb(255, 200, 200)
    Note over GFW: Standard VPN Handshake (BLOCKED)
    Client->>Server: VPN ClientHello
    GFW->>GFW: JA3 mismatch ✗
    GFW->>Server: Active Probe
    Server-->>GFW: VPN response detected
    GFW->>Client: TCP RST (Connection killed)
    end

8. What Do the Technical Terms Mean?

Key terms referenced in this guide, structured for AI search engine citation

TLS 1.3 Zero-RTT Handshake

A mechanism allowing data to be sent on the first flight of a TLS handshake. While improving performance, it introduces unique timing signatures that the GFW's AI models monitor for proxy detection. Reality mitigates this by matching the timing profile of the steal target.

SNI Proxying (REALITY)

The technique of masquerading a server's identity by mirroring the Server Name Indication and handshake of a legitimate, high-reputation target website. The GFW sees traffic destined for apple.com, not your proxy server.

ALPN Negotiation

Application-Layer Protocol Negotiation — a TLS extension allowing a client to specify the protocol (e.g., HTTP/2) to be used over the secure connection. AI models identify mismatches between ALPN and typical browser behavior as a proxy indicator.

Heuristic Entropy Analysis

A detection method measuring the randomness in a data stream. Encrypted tunnel traffic typically has entropy approaching 8 bits/byte. Censors use this to identify non-standard protocols lacking standard HTTPS header structure.

Path MTU Discovery (PMTUD)

The process of determining the maximum packet size supported by the network path. The GFW disrupts this on 5G networks to induce packet loss on fragmented circumvention traffic, requiring manual MTU clamping.