{"id":210169,"date":"2025-10-24T07:08:48","date_gmt":"2025-10-23T23:08:48","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210169\/"},"modified":"2025-10-24T07:08:49","modified_gmt":"2025-10-23T23:08:49","slug":"cdn-304","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210169\/","title":{"rendered":"CDN\u591a\u533a\u57df\u52a0\u901f\u65b0\u65b9\u6848\uff1a\u5b9e\u73b0\u5168\u7403\u4f4e\u5ef6\u8fdf\u4e0e\u667a\u80fd\u8c03\u5ea6"},"content":{"rendered":"<p>\u5728\u5168\u7403\u5316\u7684\u4e92\u8054\u7f51\u73af\u5883\u4e2d\uff0c\u7f51\u7ad9\u4e0e\u5e94\u7528\u5bf9\u4f4e\u5ef6\u8fdf\u3001\u9ad8\u53ef\u7528\u6027\u7684\u8981\u6c42\u4e0d\u65ad\u63d0\u5347\u3002\u4f20\u7edf\u5355\u4e00\u533a\u57df\u7684\u52a0\u901f\u7b56\u7565\u5df2\u96be\u4ee5\u6ee1\u8db3\u8de8\u533a\u57df\u8bbf\u95ee\u3001\u5b9e\u65f6\u4e92\u52a8\u4e0e\u4e1a\u52a1\u9ad8\u5cf0\u7684\u9700\u6c42\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u4e00\u79cd\u57fa\u4e8e\u591a\u533a\u57df\u8282\u70b9\u4e0e\u667a\u80fd\u8c03\u5ea6\u7684CDN\u65b0\u65b9\u6848\uff0c\u89e3\u6790\u5176\u539f\u7406\u3001\u5173\u952e\u6280\u672f\u5b9e\u73b0\u4e0e\u5178\u578b\u5e94\u7528\u573a\u666f\uff0c\u5e76\u7ed9\u51fa\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u4e0e\u5f00\u53d1\u8005\u7684\u9009\u8d2d\u548c\u90e8\u7f72\u5efa\u8bae\uff0c\u5e2e\u52a9\u60a8\u5728\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u6216\u65b0\u52a0\u5761\u670d\u52a1\u5668\u7b49\u6d77\u5916\u670d\u52a1\u5668\u8d44\u6e90\u65f6\uff0c\u6784\u5efa\u66f4\u9ad8\u6548\u7684\u5168\u7403\u4ea4\u4ed8\u4f53\u7cfb\u3002<\/p>\n<h2>\u5f15\u8a00\uff1a\u4e3a\u4ec0\u4e48\u9700\u8981\u591a\u533a\u57df\u52a0\u901f\u7684\u65b0\u65b9\u6848<\/h2>\n<p>\u968f\u7740\u6d41\u5a92\u4f53\u3001\u5728\u7ebf\u6559\u80b2\u3001\u7535\u5546\u4fc3\u9500\u53ca\u5b9e\u65f6\u4ea4\u4e92\u7c7b\u5e94\u7528\u7684\u5174\u8d77\uff0c\u5355\u4e00\u8fb9\u7f18\u8282\u70b9\u6216\u96c6\u4e2d\u5f0f\u673a\u623f\u7684\u6a21\u5f0f\u8d8a\u6765\u8d8a\u96be\u4ee5\u627f\u8f7d\u5168\u7403\u5316\u9700\u6c42\u3002\u5c24\u5176\u662f\u5728\u8de8\u5883\u8bbf\u95ee\u65f6\uff0c\u7528\u6237\u5728\u4e9a\u6d32\uff08\u5982\u9999\u6e2f\u3001\u97e9\u56fd\u3001\u65e5\u672c\u3001\u65b0\u52a0\u5761\uff09\u4e0e\u7f8e\u6d32\uff08\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u4e4b\u95f4\u7684\u7f51\u7edc\u94fe\u8def\u5dee\u5f02\uff0c\u4f1a\u5bfc\u81f4\u663e\u8457\u7684\u5ef6\u65f6\u4e0e\u4e22\u5305\u3002\u9762\u5bf9\u8fd9\u4e9b\u6311\u6218\uff0c\u73b0\u4ee3CDN\u6b63\u5728\u5411\u201c\u591a\u533a\u57df+\u667a\u80fd\u8c03\u5ea6\u201d\u7684\u65b9\u5411\u6f14\u8fdb\uff0c\u4ee5\u5b9e\u73b0\u66f4\u4f4e\u7684\u5c3e\u90e8\u5ef6\u8fdf\u548c\u66f4\u7a33\u5b9a\u7684\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<h2>\u539f\u7406\uff1a\u591a\u533a\u57df\u52a0\u901f\u7684\u6838\u5fc3\u6280\u672f\u6808<\/h2>\n<p>\u591a\u533a\u57df\u52a0\u901f\u65b9\u6848\u7684\u76ee\u6807\u662f\u5c06\u6d41\u91cf\u667a\u80fd\u5730\u5206\u914d\u5230\u6700\u4f18\u8fb9\u7f18\u6216\u533a\u57df\uff0c\u901a\u8fc7\u8def\u7531\u548c\u4f20\u8f93\u5c42\u4f18\u5316\u628a\u5ef6\u8fdf\u964d\u5230\u6700\u4f4e\u3002\u5176\u6838\u5fc3\u7ec4\u6210\u5305\u62ec\uff1a<\/p>\n<h3>1. \u5168\u7403\u8fb9\u7f18\u8282\u70b9\u4e0eAnycast BGP<\/h3>\n<p>\u901a\u8fc7\u5728\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u9996\u5c14\u3001\u65b0\u52a0\u5761\u4ee5\u53ca\u5317\u7f8e\u7b49\u5730\u90e8\u7f72\u5927\u91cf\u8fb9\u7f18\u8282\u70b9\uff0c\u7ed3\u5408<strong>Anycast BGP<\/strong>\uff0c\u4f7f\u5f97\u5355\u4e00IP\u5730\u5740\u5728\u5730\u7406\u4e0a\u88ab\u591a\u4e2a\u673a\u623f\u627f\u8f7d\u3002\u8def\u7531\u5668\u5c06\u6d41\u91cf\u5f15\u5bfc\u81f3\u6700\u8fd1\u6216\u5f53\u524d\u6700\u4f18\u7684\u5b9e\u4f8b\uff0c\u51cf\u5c11DNS\u89e3\u6790\u4e0e\u9996\u6b21\u8fde\u63a5\u5ef6\u8fdf\u3002<\/p>\n<h3>2. 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\u4f20\u8f93\u5c42\u4f18\u5316\uff1aTCP\u3001QUIC\u3001HTTP\/2\/3<\/h3>\n<p>\u51cf\u5c11\u63e1\u624b\u4e0e\u6392\u961f\u5ef6\u8fdf\u662f\u5173\u952e\u3002\u652f\u6301TCP\u5feb\u901f\u6253\u5f00\u3001TLS 1.3\u3001HTTP\/2\u591a\u8def\u590d\u7528\u4ee5\u53ca\u57fa\u4e8eUDP\u7684QUIC\/HTTP\/3\uff0c\u4f7f\u5f97\u77ed\u8fde\u63a5\u548c\u591a\u5c0f\u6587\u4ef6\u573a\u666f\u6027\u80fd\u5927\u5e45\u63d0\u5347\u3002\u6b64\u5916\uff0c\u5bf9\u957f\u8fde\u63a5\u91c7\u7528\u8fde\u63a5\u6c60\u4e0e\u8fde\u63a5\u590d\u7528\u7b56\u7565\uff0c\u51cf\u5c11\u8de8\u8282\u70b9\u56de\u6e90\u65f6\u7684\u5f00\u9500\u3002<\/p>\n<h3>4. \u667a\u80fd\u7f13\u5b58\u4e0e\u7f13\u5b58\u4e00\u81f4\u6027<\/h3>\n<p>\u591a\u533a\u57df\u573a\u666f\u4e0b\uff0c\u7f13\u5b58\u7b56\u7565\u6bd4\u5355\u4e00\u533a\u57df\u590d\u6742\u5f97\u591a\u3002\u65b9\u6848\u901a\u5e38\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u5206\u5c42\u7f13\u5b58\uff1a\u8fb9\u7f18\u7f13\u5b58 + \u533a\u57df\u4e2d\u95f4\u7f13\u5b58\uff08Origin Shield\uff09\uff0c\u51cf\u5c11\u5bf9\u6e90\u7ad9\u7684\u538b\u529b\u3002<\/li>\n<li>\u7f13\u5b58\u952e\u4e0eCache-Control\u7cbe\u7ec6\u5316\uff1a\u652f\u6301\u57fa\u4e8eURL\u3001Query\u3001Cookie\u3001Header\u7684\u81ea\u5b9a\u4e49cache key\u3002<\/li>\n<li>\u9884\u70ed\u4e0e\u9884\u53d6\uff1a\u5728\u70ed\u70b9\u4ea7\u751f\u524d\u5c06\u8d44\u6e90\u4e0b\u53d1\u5230\u6307\u5b9a\u533a\u57df\uff0c\u63d0\u9ad8\u7f13\u5b58\u547d\u4e2d\u7387\u3002<\/li>\n<li>\u5373\u65f6\u5931\u6548\u4e0e\u5206\u5e03\u5f0fPurge\uff1a\u5b9e\u73b0\u8de8\u533a\u57df\u5feb\u901f\u6e05\u7406\u7f13\u5b58\u3002<\/li>\n<\/ul>\n<h3>5. \u667a\u80fd\u56de\u6e90\u4e0e\u5206\u7247\u56de\u6e90\uff08Origin Routing\uff09<\/h3>\n<p>\u5f53\u8fb9\u7f18\u8282\u70b9\u672a\u547d\u4e2d\u7f13\u5b58\u65f6\uff0c\u56de\u6e90\u7b56\u7565\u51b3\u5b9a\u6027\u80fd\u4e0e\u6210\u672c\u3002\u591a\u533a\u57df\u52a0\u901f\u65b9\u6848\u901a\u5e38\u5305\u542b\uff1a<\/p>\n<ul>\n<li>\u5c31\u8fd1\u56de\u6e90\u5230\u533a\u57df\u5185\u7684Origin\u6216\u4e2d\u95f4\u673a\u623f\uff08\u5982\u9999\u6e2fVPS\u6216\u7f8e\u56fdVPS\u627f\u8f7d\u7684\u56de\u6e90\u8282\u70b9\uff09\uff0c\u907f\u514d\u8de8\u6d0b\u56de\u6e90\u3002<\/li>\n<li>\u52a8\u6001\u5206\u7247\u56de\u6e90\uff0c\u5bf9\u4e8e\u5927\u6587\u4ef6\u91c7\u7528\u591a\u7ebf\u7a0b\u5206\u6bb5\u4e0b\u8f7d\u3001\u5e76\u884c\u56de\u6e90\u5230\u591a\u4e2a\u8fb9\u7f18\u8282\u70b9\uff0c\u63d0\u9ad8\u541e\u5410\u4e0e\u7a33\u5b9a\u6027\u3002<\/li>\n<\/ul>\n<h3>6. \u5b89\u5168\u4e0e\u5408\u89c4\uff08WAF\u3001DDoS\u3001TLS\u7ba1\u7406\uff09<\/h3>\n<p>\u591a\u533a\u57df\u66b4\u9732\u66f4\u591a\u8fb9\u7f18IP\uff0c\u56e0\u800c\u9700\u8981\u7edf\u4e00\u7684\u5b89\u5168\u7b56\u7565\uff1a\u5168\u7403WAF\u7b56\u7565\u4e0b\u53d1\u3001DDoS\u8fb9\u7f18\u5438\u6536\u3001\u7edf\u4e00\u7684\u8bc1\u4e66\u7ba1\u7406\uff08\u652f\u6301SNI\u3001\u81ea\u52a8\u5316\u8bc1\u4e66\u7eed\u671f\u3001OCSP Stapling\uff09\u4ee5\u53ca\u5408\u89c4\u6027\u7684\u5730\u57df\u8bbf\u95ee\u63a7\u5236\u3002<\/p>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u8df5\u793a\u4f8b<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u5bf9CDN\u7684\u9700\u6c42\u5404\u4e0d\u76f8\u540c\uff0c\u4e0b\u9762\u5217\u4e3e\u51e0\u4e2a\u5178\u578b\u573a\u666f\u53ca\u5bf9\u5e94\u5b9e\u73b0\u7b56\u7565\uff1a<\/p>\n<h3>1. \u56fd\u9645\u7535\u5546\u4e0e\u8425\u9500\u6d3b\u52a8<\/h3>\n<p>\u7279\u70b9\uff1a\u5927\u91cf\u9759\u6001\u8d44\u6e90\u3001\u7a81\u53d1\u6027\u6d41\u91cf\u3002\u5b9e\u8df5\u8981\u70b9\uff1a<\/p>\n<ul>\n<li>\u63d0\u524d\u5c06\u9759\u6001\u8d44\u6e90\uff08\u56fe\u7247\u3001JS\u3001CSS\uff09\u9884\u70ed\u5230\u91cd\u70b9\u533a\u57df\uff08\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u6d1b\u6749\u77f6\u7b49\uff09\uff0c\u5e76\u8bbe\u7f6e\u5408\u7406\u7684Cache-Control\u4e0eETag\u3002<\/li>\n<li>\u4f7f\u7528GSLB\u5b9e\u73b0\u5c31\u8fd1\u8bbf\u95ee\uff0c\u8282\u7701\u8de8\u5883\u5e26\u5bbd\u4e0e\u964d\u4f4e\u9875\u9762\u9996\u5c4f\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<h3>2. \u6e38\u620f\u4e0e\u5b9e\u65f6\u4e92\u52a8\u5e94\u7528<\/h3>\n<p>\u7279\u70b9\uff1a\u5bf9RTT\u6781\u5176\u654f\u611f\u3001\u9700\u8981\u5927\u5e26\u5bbd\u4e0e\u4f4e\u6296\u52a8\u3002\u5b9e\u8df5\u8981\u70b9\uff1a<\/p>\n<ul>\n<li>\u4f18\u5148\u91c7\u7528QUIC\/HTTP3\u53caUDP\u52a0\u901f\u3001\u957f\u8fde\u63a5\u4fdd\u6301\u4e0e\u8fde\u63a5\u8fc1\u79fb\u652f\u6301\u3002<\/li>\n<li>\u90e8\u7f72\u8fb9\u7f18\u903b\u8f91\uff08Edge Compute\uff09\u4ee5\u5728\u8fb9\u7f18\u5b8c\u6210\u90e8\u5206\u6e38\u620f\u903b\u8f91\u6216\u4e2d\u95f4\u5c42\u8ba1\u7b97\uff0c\u51cf\u5c11\u56de\u6e90\u6b21\u6570\u3002<\/li>\n<\/ul>\n<h3>3. 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