CloFix WAF: 10-Stage Request Inspection Pipeline

# Behavior Analyzer Configuration
      behavior_analyzer {
        tool_velocity_threshold   120;
        tool_entropy_threshold    0.5;
        tool_timing_cv_threshold  0.20;
        tool_error_threshold      0.30;
        tool_asset_threshold      0.08;
        browser_score_threshold   85;
        learning_score_threshold  65;

        rate_limit {
          requests_per_minute 60;
          burst               100;
          action              challenge;
        }
      }

// Request Introspection
      get_method()         // GET, POST, etc.
      get_path()           // /api/v1/users
      get_header(name)     // User-Agent, X-API-Key
      get_cookie(name)     // session_id, csrf_token
      get_client_ip()      // 203.0.113.45
      get_request_body()   // Raw request payload

      // GeoIP Lookup
      get_country()        // Bangladesh
      get_country_code()   // BD
      get_city()           // Dhaka
      get_asn()            // AS24378
      get_isp()            // Grameenphone

      // Threat Intelligence
      is_tor(ip)           // 1 if Tor exit node
      is_vpn(ip)           // 1 if VPN/proxy
      get_reputation(ip)   // Score 0-100
      get_bot_score()      // ML-derived bot probability

      // Response Manipulation
      set_response_header(name, value)
      set_cookie(name, value, maxAge, secure, httpOnly)
      redirect(url)        // 302 redirect
      block_request()       // 403 with message

      // Rate Limiting & Utilities
      rate_limit_check(key, limit, window)
      sha256(data)         // Hash output
      base64_encode(data)  // Encoded string
      regex_match(str, pattern)
      contains(str, substr)
      to_lower(str) / to_upper(str)
      url_encode(str) / url_decode(str)
      now()                // Unix timestamp
      uuid()               // v4 UUID
      log(level, message)  // debug, info, warn, error

// TinyGo WASM Module
      package main

      import "encoding/json"

      type Request struct {
          Headers map[string]string `json:"headers"`
      }

      type Response struct {
          Allowed bool   `json:"allowed"`
          Message string `json:"message"`
      }

      //export wasm_alloc
      func wasm_alloc(size uint32) *byte

      //export process_request
      func process_request(ptr *byte, size uint32) uint64 {
          var req Request
          json.Unmarshal(memory[ptr:ptr+size], &req)
          
          apiKey := req.Headers["x-api-key"]
          if apiKey == "" {
              return block("API key required")
          }
          
          // 100 requests per minute
          if !clofix_rate_limit(apiKey, 100, 60) {
              return block("Rate limit exceeded")
          }
          
          return allow()
      }

# CRS Engine Configuration
      crs {
        enabled            on;
        paranoid_level     2;
        anomaly_threshold  5;
        score_critical     5;
        score_error        4;
        score_warning      3;
      }

# JS Engine Configuration
      js_engine {
        enabled            on;
        execution_timeout  2s;
        scan_interval      5m;
        decode_depth       8;
        cve_db             auto-update;
      }

local req = clofix.request

      if not req.uri:match('^/api/') then return end

      local api_key = req.headers['X-API-Key']
      if not api_key then
        return clofix.block(401, 'API key required')
      end

      local rl = clofix.rate_limit_ip(api_key, 1000, 3600)
      if not rl.allowed then
        return clofix.block(429, 'Rate limit exceeded')
      end

      local rep = clofix.ip_reputation(req.ip)
      if rep.score > 80 then
        return clofix.challenge()
      end

ai_engine {
        enabled             on;
        anomaly_threshold   0.85;
        baseline_window     7d;
      }

anomaly_scoring {
        inbound_threshold   5;
        blocking_paranoia   2;
      }

      bypass {
        paths  "/health,/metrics";
        ips    "192.168.1.0/24";
      }

allowlist {
        ips "192.168.0.0/16,10.0.0.0/8";
        bypass_waf on;
      }

      path_policy "/admin/*" {
        paranoia_level  4;
        time_allow      "09:00-18:00 Mon-Fri";
      }

js_injector {
        csrf_protection { enabled on; token_ttl 1h; }
        captcha {
          provider     clofix;
          challenge_ttl 24h;
        }
      }

backends {
        server https://origin1.example.com weight=10;
        server https://origin2.example.com weight=5;
      }

      load_balancer {
        algorithm least_conn;
        health_check {
          interval 10s;
          path     /health;
        }
      }

# Stripped headers
      strip_headers [
        Server X-Powered-By X-Backend-Server
        Via    X-Real-IP      X-Forwarded-For
      ];

      # Injected security headers
      inject_headers {
        Strict-Transport-Security "max-age=31536000";
        X-Frame-Options          "DENY";
        X-Content-Type-Options   "nosniff";
      }