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网站安全防护指南：防DDoS、防CC、防SQL注入_我的网站

少年四大名捕

一 |

　一键部署OpenClaw 网站上线后就会被扫描，被扫到漏洞就被打。 (ECNS) -- In Zhejiang, artificial intelligence is moving from laboratories into everyday care, offering practical support to people with disabilities, older adults and patients. At a rehabilitation center in Hangzhou’s Yuhang District, nine-year-old Xiaoyu, who developed cerebral palsy after being born prematurely, is learning to walk with the help of a robotic exoskeleton. Powered by an AI algorithm, the device adjusts training programs to patients’ movements and medical conditions. More than 5,000 people have received free rehabilitation through the center’s public welfare program, which aims to narrow the gap in access to professional therapists. AI is also bringing companionship to elderly care. At a smart nursing home in Hangzhou, emotional-support robots chat with residents and tell jokes, while intelligent wheelchairs can fetch objects, press elevator buttons and provide transportation. Other robots monitor vital signs and conduct routine rounds, easing caregivers’ workload. In the healthcare sector, Zhejiang Province has developed a provincewide shared medical AI agent named “An Zhen’er.” It provides the public with over 40 intelligent medical and health services, including smart navigation for hospital visits, accompanied patient guidance during appointments, AIpowered interpretation of medical reports, and more. The system handles more than 1 million service requests per day. (By Intern Lin Qiaochu, Zhang Dongfang) 。安全防护不是一次性工作，而是持续的基本功。先说SQL注入。最常见的攻击方式，黑客通过表单输入拼接SQL语句。防护方法很简单：用参数化查询，干掉字符串拼接。 # PHP防SQL注入写法（PDO参数化查询） // 错误写法：直接拼接字符串 $sql = "SELECT * FROM users WHERE name='" . $_POST['name'] . "'"; // 正确写法：使用PDO预处理 $stmt = $pdo->prepare("SELECT * FROM users WHERE name = :name"); $stmt->execute([':name' => $_POST['name']]); $result = $stmt->fetchAll(); 再说CC攻击。某个IP频繁请求你的页面，把服务器资源耗尽。Nginx可以限制单IP请求频率。

二 | # Nginx限制单IP请求频率（nginx.conf） http { limit_req_zone $binary_remote_addr zone=one:10m rate=10r/s; server { location / { limit_req zone=one burst=20 nodelay; # 每秒最多10个请求，突发允许20个 } } } # 封禁恶意User-Agent if ($http_user_agent ~* "bot|spider|crawler") { return 403; } DDoS防护个人站长很难自己搞，最好的办法是接CDN。Cloudflare免费版就能挡住大部分小规模DDoS。如果被打得很狠，就开CDN的“我被攻击了”模式，所有流量走CDN审查。另外几个基本操作：后台目录加密码保护、数据库定期备份、程序及时更新打补丁。