{"id":209665,"date":"2025-10-23T20:07:42","date_gmt":"2025-10-23T12:07:42","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209665\/"},"modified":"2025-10-23T20:07:43","modified_gmt":"2025-10-23T12:07:43","slug":"cdn-82","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209665\/","title":{"rendered":"\u4f01\u4e1a\u4e91\u670d\u52a1\u4e2d\u7684CDN\uff1a\u6027\u80fd\u63d0\u5347\u4e0e\u5b89\u5168\u52a0\u56fa\u7684\u5229\u5668"},"content":{"rendered":"<p>\u5728\u5f53\u4eca\u4e92\u8054\u7f51\u4e1a\u52a1\u5bf9\u6027\u80fd\u4e0e\u5b89\u5168\u7684\u53cc\u91cd\u8981\u6c42\u4e0b\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u5df2\u6210\u4e3a\u4f01\u4e1a\u4e91\u670d\u52a1\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u73af\u3002\u65e0\u8bba\u662f\u9762\u5411\u5168\u7403\u7528\u6237\u7684\u7535\u5546\u5e73\u53f0\uff0c\u8fd8\u662f\u4e3a\u672c\u5730\u7528\u6237\u63d0\u4f9b\u9ad8\u53ef\u7528\u6027\u7684\u4f01\u4e1a\u7ad9\u70b9\uff0c\u5408\u7406\u8bbe\u8ba1\u4e0e\u90e8\u7f72CDN\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u54cd\u5e94\u901f\u5ea6\u3001\u964d\u4f4e\u6e90\u7ad9\u8d1f\u8f7d\u5e76\u5f3a\u5316\u5b89\u5168\u9632\u62a4\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u6df1\u5165\u5256\u6790CDN\u7684\u5de5\u4f5c\u539f\u7406\u3001\u5b9e\u9645\u5e94\u7528\u573a\u666f\u3001\u6027\u80fd\u4e0e\u5b89\u5168\u65b9\u9762\u7684\u6280\u672f\u7ec6\u8282\uff0c\u5e76\u7ed9\u51fa\u9009\u8d2d\u4e0e\u90e8\u7f72\u5efa\u8bae\u3002<\/p>\n<h2>CDN 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TTL\uff0c\u4f8b\u5982\u9759\u6001\u7248\u672c\u5316\u6587\u4ef6\u53ef\u8bbe\u7f6e\u957f\u671f\u7f13\u5b58\uff0c\u800c\u9891\u7e41\u66f4\u65b0\u7684 API \u54cd\u5e94\u5219\u91c7\u7528\u77ed TTL \u6216\u4e0d\u7f13\u5b58\u3002<\/li>\n<li>\u7f13\u5b58\u5237\u65b0\uff08Purge\uff09\u4e0e\u9884\u70ed\uff08Prefetch\uff09\uff1a\u652f\u6301\u6309 URL\u3001\u524d\u7f00\u6216\u6807\u7b7e\u8fdb\u884c\u5373\u65f6\u6e05\u9664\uff0c\u4ee5\u53ca\u57fa\u4e8e\u6d41\u91cf\u9884\u70ed\u5173\u952e\u9875\u9762\uff0c\u51cf\u5c11\u7f13\u5b58\u51b7\u542f\u52a8\u5bf9\u7528\u6237\u4f53\u9a8c\u7684\u5f71\u54cd\u3002<\/li>\n<li>\u5206\u5c42\u7f13\u5b58\uff08Hierarchical Caching\uff09\uff1a\u5728\u591a\u4e2a\u7f13\u5b58\u5c42\uff08\u672c\u5730\u3001\u533a\u57df\u3001\u4e2d\u5fc3\uff09\u4e4b\u95f4\u534f\u8c03\uff0c\u6709\u6548\u964d\u4f4e\u7f13\u5b58\u5931\u6548\u7387\u4e0e\u56de\u6e90\u5e26\u5bbd\u3002<\/li>\n<\/ul>\n<h3>\u4f20\u8f93\u4f18\u5316\u6280\u672f<\/h3>\n<ul>\n<li>TCP\/QUIC 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POP\uff0c\u80fd\u591f\u4e3a\u4e0d\u540c\u533a\u57df\u7528\u6237\u63d0\u4f9b\u8f83\u4e3a\u4e00\u81f4\u7684\u8bbf\u95ee\u4f53\u9a8c\u3002<\/p>\n<h3>\u591a\u4e91\u4e0e\u6df7\u5408\u4e91\u90e8\u7f72<\/h3>\n<p>\u4f01\u4e1a\u5f80\u5f80\u5c06\u4e0d\u540c\u4e1a\u52a1\u90e8\u7f72\u5728\u4e0d\u540c\u5730\u533a\uff08\u5982\u9999\u6e2fVPS \u505a\u672c\u5730 CDN \u7f13\u5b58\u8282\u70b9\uff0c\u7f8e\u56fdVPS \u5904\u7406\u5317\u7f8e\u4e1a\u52a1\uff09\uff0cCDN \u53ef\u4f5c\u4e3a\u7edf\u4e00\u7684\u6d41\u91cf\u5165\u53e3\uff0c\u5c4f\u853d\u5e95\u5c42\u7f51\u7edc\u5dee\u5f02\uff0c\u5b9e\u73b0\u7edf\u4e00\u7684\u5b89\u5168\u4e0e\u7f13\u5b58\u7b56\u7565\u3002<\/p>\n<h3>\u52a8\u6001\u4e0e\u9759\u6001\u5185\u5bb9\u6df7\u5408\u52a0\u901f<\/h3>\n<p>\u73b0\u4ee3\u5e94\u7528\u4e2d\u5927\u91cf API \u8bf7\u6c42\u9700\u8981\u52a8\u6001\u5904\u7406\uff0c\u7eaf\u7cb9\u7684\u9759\u6001\u7f13\u5b58\u65e0\u6cd5\u6ee1\u8db3\u9700\u6c42\u3002\u8fb9\u7f18\u8ba1\u7b97\uff08Edge Computing\uff09\u4e0e\u8fb9\u7f18\u811a\u672c\uff08\u5982\u8fb9\u7f18\u51fd\u6570\uff09\u80fd\u591f\u5728 CDN \u8282\u70b9\u6267\u884c\u5c0f\u91cf\u4e1a\u52a1\u903b\u8f91\uff0c\u5b9e\u73b0\u8ba4\u8bc1\u3001A\/B \u6d4b\u8bd5\u6216\u4e2a\u6027\u5316\u6e32\u67d3\uff0c\u4ece\u800c\u51cf\u5c11\u540e\u7aef\u54cd\u5e94\u538b\u529b\u3002<\/p>\n<h3>\u4fdd\u62a4\u6e90\u7ad9\u4e0e\u6297 DDoS<\/h3>\n<p>CDN \u5e38\u914d\u5408 WAF\uff08Web \u5e94\u7528\u9632\u706b\u5899\uff09\u4e0e DDoS \u7f13\u89e3\u673a\u5236\u4f7f\u7528\uff0c\u4ee5\u8fb9\u7f18\u8282\u70b9\u4f5c\u4e3a\u7b2c\u4e00\u9632\u7ebf\u3002\u901a\u8fc7\u6d41\u91cf\u6e05\u6d17\u3001\u901f\u7387\u9650\u5236\u3001IP 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\u6d4b\u8bd5\u3001\u56fd\u9645\u5316\u9875\u9762\u6e32\u67d3\u6216\u8f7b\u91cf\u8ba4\u8bc1\uff0c\u51cf\u5c11\u8de8\u5730\u57df\u56de\u6e90\u3002<\/li>\n<li><strong>\u76d1\u63a7\u4e0e\u94fe\u8def\u4f18\u5316\uff1a<\/strong>\u901a\u8fc7\u5b9e\u65f6\u76d1\u63a7 CDN \u547d\u4e2d\u7387\u3001\u56de\u6e90\u5ef6\u8fdf\u548c\u5404\u8282\u70b9\u8d1f\u8f7d\uff0c\u81ea\u52a8\u89e6\u53d1\u8c03\u5ea6\u4e0e\u6269\u5bb9\u7b56\u7565\u3002<\/li>\n<\/ul>\n<h3>\u5b89\u5168\u52a0\u56fa\u5b9e\u8df5<\/h3>\n<ul>\n<li><strong>\u524d\u7f6e WAF \u4e0e Bot \u7ba1\u7406\uff1a<\/strong>\u5728\u8fb9\u7f18\u62e6\u622a\u5e38\u89c1\u6ce8\u5165\u3001XSS\u3001\u722c\u866b\u53ca\u574f Bot \u7684\u6076\u610f\u8bf7\u6c42\u3002<\/li>\n<li><strong>\u8bc1\u4e66\u4e0e\u52a0\u5bc6\uff1a<\/strong>\u652f\u6301\u81ea\u52a8\u5316\u8bc1\u4e66\u7ba1\u7406\uff08Let&#8217;s Encrypt \u6216\u81ea\u6709 CA\uff09\uff0c\u5168\u94fe\u8def\u542f\u7528 TLS\uff0c\u4f7f\u7528 HSTS \u5f3a\u5236 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