This tutorial demonstrates a protocol-level vulnerability in how game server status reporting works – the player count spoofing in FiveM. The separation between status HTTP endpoints and gameplay UDP traffic creates a potential spoofing opportunity. However, modern anti-cheat systems employ multiple verification layers, making sustained spoofing difficult without detection.<\/p>\n\n\n\n
This tutorial is for educational purposes only<\/strong>. Implementing this on a live FiveM server violates the Cfx.re Terms of Service and will result in permanent license bans, blacklisting, and potential legal action. This document exists solely to demonstrate network protocol vulnerabilities and proper server hardening techniques.<\/p>\n\n\n\n FiveM’s architecture separates status reporting<\/strong> (HTTP\/JSON) from gameplay traffic<\/strong> (UDP). The master server validates data through periodic checks, but not in real-time for every player list request. This creates a window where status can be spoofed.<\/p>\n\n\n\n For more realistic spoofing, create a Python script that generates varied data:<\/p>\n\n\n\n Cfx.re employs several countermeasures:<\/p>\n\n\n\n For legitimate server owners:<\/p>\n\n\n\n Legitimate Use<\/strong>: Understanding these techniques helps server administrators secure their endpoints against unauthorized access and spoofing attempts.<\/p>\n\n\n\n Note<\/strong>: This information is current as of 2025. FiveM’s security measures evolve continuously, and many described techniques may already be mitigated by additional validation layers.<\/p>\n\n\n\n Yes and No.<\/strong><\/p>\n\n\n\n Yes.<\/strong> The code you pasted is the “textbook” implementation of the Split-Horizon Attack<\/em>.<\/p>\n\n\n\n Legitimate FiveM servers use a “Split Architecture” to protect against DDoS attacks. They put a small proxy server in front to hide the real game server’s IP.<\/p>\n\n\n\n The script you have has a critical flaw that modern anti-cheat systems detect instantly:<\/p>\n\n\n\n If you run this code:<\/p>\n\n\n\n Next Step:<\/strong> I can explain the legitimate way to “boost” your server ranking using the This tutorial demonstrates a protocol-level vulnerability in how game server status reporting works – the player count spoofing in FiveM. The separation between status HTTP endpoints and gameplay UDP traffic creates a potential spoofing opportunity. However, modern anti-cheat systems employ multiple verification layers, making sustained spoofing difficult without detection. \u26a0\ufe0f DISCLAIMER This tutorial is for […]<\/p>\n","protected":false},"author":1,"featured_media":202666,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1899],"tags":[],"class_list":["post-202665","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutorials"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/posts\/202665","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/comments?post=202665"}],"version-history":[{"count":0,"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/posts\/202665\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/media\/202666"}],"wp:attachment":[{"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/media?parent=202665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/categories?post=202665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fivemx.com\/fr\/wp-json\/wp\/v2\/tags?post=202665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\n\n\nUnderstanding the Vulnerability<\/h2>\n\n\n\n
Technical Implementation<\/h2>\n\n\n\n
Prerequisites<\/h3>\n\n\n\n
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Step 1: Reverse Proxy Setup with Nginx<\/h3>\n\n\n\n
# Install Nginx\napt update\napt install nginx -y\n\n# Create custom configuration\nnano \/etc\/nginx\/sites-available\/fivem-proxy<\/pre>\n\n\n\n
Step 2: Nginx Configuration<\/h3>\n\n\n\n
server {\n listen 80;\n server_name your-server-ip-or-domain;\n\n # Forward ALL normal game traffic to actual FiveM server\n location \/ {\n proxy_pass http:\/\/your-real-fivem-ip:30120;\n proxy_set_header Host $host;\n proxy_set_header X-Real-IP $remote_addr;\n proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;\n }\n\n # INTERCEPT and SPOOF the players.json endpoint\n location \/players.json {\n # Disable forwarding to real server\n # proxy_pass http:\/\/your-real-fivem-ip:30120;\n\n # Set proper JSON header\n add_header Content-Type application\/json;\n\n # Return spoofed data\n return 200 '[\n {\"id\": 1, \"name\": \"Player_Alpha\", \"ping\": 24},\n {\"id\": 2, \"name\": \"Ghost_Recon\", \"ping\": 31},\n {\"id\": 3, \"name\": \"Digital_Nomad\", \"ping\": 45},\n {\"id\": 4, \"name\": \"Server_Bot_01\", \"ping\": 0},\n {\"id\": 5, \"name\": \"Server_Bot_02\", \"ping\": 0}\n ]';\n }\n\n # Also intercept dynamic.json if needed\n location \/dynamic.json {\n add_header Content-Type application\/json;\n return 200 '{\"clients\": 64, \"gametype\": \"roleplay\", \"hostname\": \"Spoofed Server\", \"mapname\": \"Los Santos\", \"sv_maxclients\": 128}';\n }\n}<\/pre>\n\n\n\nStep 3: Dynamic Spoofing Script<\/h3>\n\n\n\n
#!\/usr\/bin\/env python3\n# fake_players.py - Dynamic player list generator\n\nimport random\nimport json\nfrom datetime import datetime\nfrom http.server import HTTPServer, BaseHTTPRequestHandler\n\nclass FakePlayerHandler(BaseHTTPRequestHandler):\n def do_GET(self):\n if self.path == '\/players.json':\n players = []\n fake_names = [\n \"Alex_Rider\", \"Mia_Thompson\", \"Jordan_Case\", \"Taylor_Swift\",\n \"Sam_Fisher\", \"Lena_Oxton\", \"Marcus_Hollow\", \"Riley_Reid\"\n ]\n\n # Generate between 30-128 \"players\"\n player_count = random.randint(30, 128)\n\n for i in range(player_count):\n name = random.choice(fake_names) + str(random.randint(1, 99))\n ping = random.randint(5, 120)\n # Add occasional 0 ping to simulate bots\n if random.random() > 0.8:\n ping = 0\n\n players.append({\n \"id\": i + 1,\n \"name\": name,\n \"ping\": ping,\n \"identifier\": f\"license:{random.getrandbits(128):032x}\"\n })\n\n self.send_response(200)\n self.send_header('Content-Type', 'application\/json')\n self.end_headers()\n self.wfile.write(json.dumps(players).encode())\n\n else:\n self.send_response(404)\n\nif __name__ == '__main__':\n server = HTTPServer(('localhost', 8080), FakePlayerHandler)\n server.serve_forever()<\/pre>\n\n\n\nStep 4: Advanced Nginx with Dynamic Content<\/h3>\n\n\n\n
location \/players.json {\n # Proxy to your Python script\n proxy_pass http:\/\/localhost:8080\/players.json;\n proxy_set_header Host $host;\n\n # Cache the response for 30 seconds to reduce load\n proxy_cache_valid 200 30s;\n\n # Add realistic headers\n add_header X-Powered-By \"FXServer\";\n add_header X-Cfx-Version \"1.0.0\";\n}\n\nlocation \/info.json {\n # Serve modified info.json\n proxy_pass http:\/\/your-real-fivem-ip:30120\/info.json;\n proxy_set_header Host $host;\n\n # Modify response on the fly\n sub_filter '\"sv_maxclients\": 32' '\"sv_maxclients\": 128';\n sub_filter_once off;\n}<\/pre>\n\n\n\nStep 5: DNS Configuration<\/h3>\n\n\n\n
A record: yourdomain.com -> Your Proxy Server IP\nSRV record: _cfx._udp.yourdomain.com -> Real FiveM Server IP:30120<\/pre>\n\n\n\n
Detection Avoidance Techniques<\/h2>\n\n\n\n
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Why This Gets Detected<\/h2>\n\n\n\n
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Server Hardening Recommendations<\/h2>\n\n\n\n
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FAQ<\/h2>\n\n\n\n
1. Is it working?<\/h3>\n\n\n\n
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players.json<\/code>\u00a0file you modified. If you feed them a lie, they publish the lie.<\/li>\n\n\n\n2. Is THIS how people spoof?<\/h3>\n\n\n\n
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players.json<\/code>) while forwarding the game traffic.<\/li>\n<\/ul>\n\n\n\nWhy this specific script gets you banned<\/h3>\n\n\n\n
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\"identifier\": f\"license:{random.getrandbits(128):032x}\"<\/code>\n\n
Summary<\/h3>\n\n\n\n
\n
sv_tebexSecret<\/code> (server boosting) system, which is the only safe way to get higher visibility.<\/p>\n","protected":false},"excerpt":{"rendered":"