哪些服务器必须保持外网开放,关键业务场景与安全防护解析,外网开放服务器安全解析,关键业务场景与防护策略
Which servers must remain open to the external network, key business scenarios and security protection analysis, security analysis of external network open servers, key business scenarios and protection strategies
以上为机器翻译结果，长、整句建议使用 人工翻译 。