{"id":167102,"date":"2026-08-04T13:09:57","date_gmt":"2026-08-04T10:09:57","guid":{"rendered":"https:\/\/www.catonetworks.com\/glossary\/%e5%b8%b8%e8%a7%81%e7%9a%84dns%e5%ae%89%e5%85%a8%e9%97%ae%e9%a2%98\/"},"modified":"2026-08-23T15:11:42","modified_gmt":"2026-08-23T12:11:42","slug":"common-dns-security-issues","status":"publish","type":"glossary","link":"https:\/\/www.catonetworks.com\/zh\/glossary\/common-dns-security-issues\/","title":{"rendered":"\u5e38\u898b\u7684 DNS \u5b89\u5168\u6027\u554f\u984c"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u7db2\u57df\u540d\u7a31\u7cfb\u7d71 (DNS) \u662f\u7db2\u969b\u7db2\u8def\u7684\u91cd\u8981\u7d44\u4ef6\u3002\u5b83\u7684\u4f5c\u7528\u662f\u5c07\u7db2\u57df\u540d\u7a31\u8f49\u63db\u70ba\u7528\u65bc\u5c07\u7db2\u7d61\u6d41\u91cf\u8def\u7531\u5230\u9810\u5b9a\u76ee\u7684\u5730\u7684 IP \u4f4d\u5740\u3002DNS \u7684\u91cd\u8981\u89d2\u8272\u548c\u9ed8\u8a8d\u60c5\u6cc1\u4e0b\u7f3a\u4e4f\u5167\u7f6e\u5b89\u5168\u6027\u4f7f\u5176\u6210\u70ba\u7db2\u7d61\u72af\u7f6a\u5206\u5b50\u7684\u5e38\u898b\u76ee\u6a19\u3002\u653b\u64ca\u8005\u53ef\u4ee5\u5229\u7528\u62d2\u7d55\u670d\u52d9 (DoS) \u653b\u64ca\u76ee\u6a19 DNS\uff0c\u4f7f\u7db2\u7ad9\u7121\u6cd5\u9023\u63a5\uff0c\u6216\u5229\u7528 DNS \u5b89\u5168\u6027\u6f0f\u6d1e\u4f86\u5be6\u73fe\u81ea\u5df1\u7684\u76ee\u6a19\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-understanding-dns-and-its-security-challenges\">\u77ad\u89e3 DNS \u53ca\u5176\u5b89\u5168\u6311\u6230<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u96fb\u8166\u7528\u4f86\u8b58\u5225\u5f7c\u6b64\u7684 IP \u4f4d\u5740\u5f88\u96e3\u8a18\u4f4f\uff0c\u9019\u5c31\u662f\u7db2\u57df\u540d\u7a31\u5b58\u5728\u7684\u539f\u56e0\u3002DNS \u7684\u4f5c\u7528\u662f\u5728\u53ef\u8a18\u61b6\u7684\u7db2\u57df\u540d\u7a31\uff08\u4f8b\u5982 catonetworks.com\uff09\u548c IP \u5730\u5740\uff08\u5982 45.60.110.90\uff09\u4e4b\u9593\u9032\u884c\u8f49\u63db\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DNS \u662f\u4e92\u806f\u7db2\u7684\u57fa\u790e\u901a\u8a0a\u5354\u5b9a\u4e4b\u4e00\uff0c\u5728\u5b89\u5168\u6027\u6210\u70ba\u8feb\u5207\u95dc\u6ce8\u4e4b\u524d\u958b\u767c\u7684\u3002\u56e0\u6b64\uff0c\u9810\u8a2d\u60c5\u6cc1\u4e0b\uff0cDNS \u67e5\u8a62\u548c\u56de\u61c9\u7f3a\u4e4f\u52a0\u5bc6\u548c\u9a57\u8b49\u3002DNS \u7684\u91cd\u8981\u4f5c\u7528\u4ee5\u53ca\u7f3a\u4e4f\u52a0\u5bc6\u548c\u8eab\u4efd\u9a57\u8b49\u4f7f\u5176\u6210\u70ba\u653b\u64ca\u8005\u7684\u4e3b\u8981\u76ee\u6a19\u3002\u7531\u65bc\u6574\u500b\u4e92\u806f\u7db2\u90fd\u4f7f\u7528\u4e26\u4fe1\u4efb DNS\uff0c\u56e0\u6b64\u5229\u7528\u5b83\u7684\u653b\u64ca\u53ef\u80fd\u6703\u7522\u751f\u91cd\u5927\u7684\u5f71\u97ff\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-common-dns-security-threats\">\u5e38\u898b\u7684 DNS \u5b89\u5168\u5a01\u8105<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNS \u7684\u653b\u64ca\u662f\u4e00\u7a2e\u5e38\u898b\u7684<a href=\"https:\/\/www.catonetworks.com\/network-security\/network-security-threats\/\">\u7db2\u7d61\u5b89\u5168\u5a01\u8105<\/a>\uff0c\u56e0\u70ba\u5b83\u7684\u91cd\u8981\u4f5c\u7528\u548c\u5b89\u5168\u6027\u8f03\u5f31\u3002\u8207 DNS \u76f8\u95dc\u7684\u4e00\u4e9b\u6700\u5e38\u898b\u7684\u5b89\u5168\u5a01\u8105\u5305\u62ec\u4ee5\u4e0b\u5167\u5bb9\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dns-cache-poisoning\">DNS \u7de9\u5b58\u4e2d\u6bd2<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DNS \u89e3\u6790\u7a0b\u5f0f\u901a\u5e38\u5feb\u53d6\u5e38\u5b58\u53d6\u7684 DNS \u8a18\u9304\uff0c\u63d0\u9ad8\u901f\u5ea6\u4e26\u964d\u4f4e DNS \u4f3a\u670d\u5668\u7684\u8ca0\u8f09\u3002\u5728 DNS \u5feb\u53d6\u4e2d\u6bd2\u653b\u64ca\u4e2d\uff0c\u653b\u64ca\u8005\u5229\u7528\u7f3a\u5c11 DNS \u52a0\u5bc6\u548c\u9a57\u8b49\uff0c\u5c07\u5047 DNS 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class=\"wp-block-paragraph\">\u7db2\u57df\u9670\u5f71\u5c07\u5728\u53d7\u5230\u653b\u64ca\u8005\u5165\u4fb5\u7684\u5408\u6cd5\u6839\u7db2\u57df\u4e0b\u5efa\u7acb\u60e1\u610f\u5b50\u7db2\u57df\u3002\u9019\u6a23\u505a\uff0c\u653b\u64ca\u8005\u6703\u5efa\u7acb\u4e00\u500b\u96e3\u4ee5\u5075\u6e2c\u7684\u5b50\u7db2\u57df\uff0c\u4ee5\u5229\u7528\u5408\u6cd5\u6839\u7db2\u57df\u7684\u4fe1\u8b7d\u3002\u7136\u5f8c\uff0c\u9019\u500b\u5b50\u7db2\u57df\u53ef\u4ee5\u7528\u65bc\u7db2\u8def\u91e3\u9b5a\u653b\u64ca\uff0c\u6216\u4f5c\u70ba\u60e1\u610f\u8edf\u9ad4\u547d\u4ee4\u548c\u63a7\u5236 (C2) \u57fa\u790e\u67b6\u69cb\uff0c\u964d\u4f4e\u5075\u6e2c\u6216\u88ab\u7d44\u7e54\u5c01\u9396\u7684\u98a8\u96aa\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-nxdomain-attacks-phantom-domain-attacks\">NXDOMAIN \u653b\u64ca\uff08\u5e7b\u5f71\u7db2\u57df\u653b\u64ca\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">NXDOMAIN \u653b\u64ca\u662f\u4e00\u7a2e\u985e\u578b\u7684 DoS 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\u89e3\u6790\u7a0b\u5f0f\u53ef\u80fd\u6703\u76e3\u63a7\u4f7f\u7528\u8005\u7684 DNS \u8981\u6c42\uff0c\u4e26\u63d0\u4f9b\u4e0d\u6b63\u78ba\u7684\u8cc7\u8a0a\uff0c\u4ee5\u5c07\u4f7f\u7528\u8005\u50b3\u9001\u5230\u7db2\u8def\u91e3\u9b5a\u9801\u9762\u3002\u4f7f\u7528\u8005\u53ef\u80fd\u6703\u900f\u904e DHCP \u4e2d\u6bd2\u6216\u60e1\u610f\u7a0b\u5f0f\u50b3\u9001\u5230\u60e1\u610f DNS \u89e3\u6790\u5668\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dns-rebinding\">DNS \u91cd\u65b0\u9023\u63a5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 DNS \u91cd\u65b0\u7e6b\u7d50\u653b\u64ca\u4e2d\uff0c\u653b\u64ca\u8005\u63a7\u5236\u7684 DNS \u4f3a\u670d\u5668\u6700\u521d\u6703\u4f7f\u7528\u63d0\u4f9b\u60e1\u610f\u7a0b\u5f0f\u78bc\u7684\u7db2\u7ad9\u7684 IP \u4f4d\u5740\u56de\u61c9 DNS \u8acb\u6c42\uff0c\u4f46\u6307\u5b9a\u975e\u5e38\u77ed\u7684\u751f\u5b58\u6642\u9593 (TTL) \u503c\u3002\u7576 TTL \u5230\u671f\u6642\uff0c\u7528\u6236\u7684\u700f\u89bd\u5668\u5c07\u63d0\u51fa\u53e6\u4e00\u500b\u8acb\u6c42\uff0c\u60e1\u610f DNS \u670d\u52d9\u5668\u5c07\u4f7f\u7528\u5167\u90e8\u8cc7\u6e90\u7684 IP \u5730\u5740\u56de\u7b54\u8a72\u8acb\u6c42\u3002\u56e0\u6b64\uff0c\u7db2\u57df\u53ef\u80fd\u88ab\u8996\u70ba\u5167\u90e8\u7db2\u8def\u7684\u4e00\u90e8\u5206\uff0c\u5141\u8a31\u60e1\u610f\u7a0b\u5f0f\u78bc\u7e5e\u904e\u76f8\u540c\u4f86\u6e90\u653f\u7b56 (SOP) \u4e26\u5b58\u53d6\u5167\u90e8\u8cc7\u6e90\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-typosquatting-and-homograph-attacks\">\u5b57\u578b\u7de8\u5beb\u548c\u540c\u5f62\u653b\u64ca<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u578b\u7de8\u5beb\u548c\u540c\u985e\u578b\u653b\u64ca\u6d89\u53ca\u5efa\u7acb\u8207\u5408\u6cd5\u7db2\u57df\u975e\u5e38\u76f8\u4f3c\u7684\u60e1\u610f\u7db2\u57df\u3002\u5982\u679c\u7528\u6236\u8f38\u5165\u932f\u8aa4\u7684 URL \u6216\u9ede\u64ca\u7db2\u7d61\u91e3\u9b5a\u96fb\u5b50\u90f5\u4ef6\u4e2d\u7684\u93c8\u63a5\uff0c\u4ed6\u5011\u5c07\u88ab\u5c0e\u5411\u5230\u653b\u64ca\u8005\u63a7\u5236\u7684\u7db2\u7ad9\u3002\u901a\u5e38\uff0c\u5982\u679c\u7528\u6236\u5728\u7db2\u8def\u91e3\u9b5a\u7db2\u7ad9\u4e2d\u8f38\u5165\u5176\u8a8d\u8b49\uff0c\u5247\u6b64\u529f\u80fd\u6703\u7528\u65bc\u6191\u8b49\u6536\u96c6\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-best-practices-for-dns-security\">DNS \u5b89\u5168\u6027\u7684\u6700\u4f73\u505a\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9632\u7bc4\u5e38\u898b DNS <a href=\"https:\/\/www.catonetworks.com\/network-security\/best-practices\/\">\u5a01\u8105\u7684\u4e00\u4e9b\u7db2\u8def\u5b89\u5168<\/a>\u6700\u4f73\u505a\u6cd5\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5be6\u65bd DNSSEC\uff1a<\/strong>DNS \u5b89\u5168\u6027\u64f4\u5145\u529f\u80fd (DNSSEC) \u5be6\u4f5c DNS \u67e5\u8a62\u7684\u9a57\u8b49\u3002\u5728\u7d44\u7e54\u7684\u7db2\u57df\u4e0a\u555f\u7528\u5b83\u6709\u52a9\u65bc\u9632\u6b62\u5b83\u5011\u5728 DNS \u653b\u64ca\u4e2d\u4f7f\u7528\u3002<\/li>\n\n\n\n<li><strong>\u76e3\u63a7 DNS \u6d41\u91cf\uff1a<\/strong>\u8a31\u591a DNS \u653b\u64ca\u90fd\u6d89\u53ca\u4e0d\u5c0b\u5e38\u7684 DNS \u67e5\u8a62\u548c\u56de\u61c9\u3002\u76e3\u63a7 DNS \u6d41\u91cf\u662f\u5426\u5b58\u5728\u7570\u5e38\u72c0\u6cc1\uff0c\u53ef\u5354\u52a9\u5075\u6e2c\u6f5b\u5728\u7684\u653b\u64ca\u3002<\/li>\n\n\n\n<li><strong>\u8a18\u9304 DNS \u8acb\u6c42\uff1a<\/strong>DNS \u8acb\u6c42\u63d0\u4f9b\u96fb\u8166\u6240\u9020\u8a2a\u7684\u7db2\u7ad9\u4ee5\u53ca\u9023\u7d61\u7db2\u57df\u7684\u8a18\u9304\u3002\u8a18\u9304\u9019\u9805\u8cc7\u6599\u5c0d\u65bc\u7db2\u8def\u91e3\u9b5a\u653b\u64ca\u3001\u60e1\u610f\u8edf\u9ad4\u611f\u67d3\u6216\u5176\u4ed6\u5b89\u5168\u4e8b\u4ef6\u7684\u9451\u8b58\u8abf\u67e5\u4f86\u8aaa\u662f\u5bf6\u8cb4\u7684\u3002<\/li>\n\n\n\n<li><strong>\u4f7f\u7528\u4fe1\u8b7d\u826f\u597d\u7684 DNS \u670d\u52d9\uff1a<\/strong>\u7d44\u7e54\u53ef\u4ee5\u9078\u53d6\u7528\u4f86\u89e3\u6c7a\u5176\u8acb\u6c42\u7684 DNS \u63d0\u4f9b\u8005\u3002\u9078\u64c7\u77e5\u540d\u7684 DNS \u4f3a\u670d\u5668\u53ef\u964d\u4f4e\u60e1\u610f\u91cd\u65b0\u5c0e\u5411\u6216\u9593\u8adc\u6d3b\u52d5\u7684\u6f5b\u5728\u98a8\u96aa\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-integrating-dns-security-into-a-sase-framework\">\u5c07 DNS \u5b89\u5168\u6574\u5408\u5230 SASE \u6846\u67b6\u4e2d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.catonetworks.com\/sase\/\">\u5b89\u5168\u5b58\u53d6\u670d\u52d9\u908a\u7de3 (SASE)<\/a> \u67b6\u69cb\u5c07\u5404\u7a2e\u5b89\u5168\u6027\u548c\u7db2\u8def\u529f\u80fd\u6574\u5408\u5230\u4e00\u500b\u89e3\u6c7a\u65b9\u6848\u4e2d\u3002\u4f7f\u7528\u63d0\u4f9b DNS \u5373\u670d\u52d9 (DaaS) \u7684 SASE \u5e73\u53f0\u53ef\u4ee5\u5e6b\u52a9\u4fdd\u8b77\u7d44\u7e54\u514d\u53d7\u5404\u7a2e\u5a01\u8105\u7684\u4fb5\u5bb3\u3002\u900f\u904e\u5167\u5efa\u65bc\u7d44\u7e54\u7684 SASE \u5e73\u53f0\u4e2d\u7684 DNS\uff0c\u8a72\u516c\u53f8\u53d7\u5230\u4fdd\u8b77\u514d\u53d7\u60e1\u610f DNS \u4f3a\u670d\u5668\u7684\u4fb5\u5bb3\uff0c\u4e26\u4e14\u53ef\u4ee5\u57f7\u884c DNS \u7be9\u9078\u4ee5\u8b58\u5225\u4e26\u5c01\u9396\u901a\u5f80\u5df2\u77e5\u60e1\u610f\u7db2\u57df\u7684\u6d41\u91cf\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faqs-about-common-dns-security-issues\">\u5e38\u898b DNS \u5b89\u5168\u6027\u554f\u984c\u7684\u5e38\u898b\u554f\u984c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-is-dns-cache-poisoning\">\u4ec0\u9ebc\u662f DNS \u7de9\u5b58\u4e2d\u6bd2\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DNS \u5feb\u53d6\u4e2d\u6bd2\u6703\u5c0e\u81f4\u60e1\u610f DNS \u9805\u76ee\u9032\u5165 DNS \u89e3\u6790\u5668\u7684\u5feb\u53d6\u3002\u56e0\u6b64\uff0c\u8981\u6c42\u8a72\u7db2\u57df\u7684\u7528\u6236\u5c07\u88ab\u91cd\u5b9a\u5411\u5230\u653b\u64ca\u8005\u63a7\u5236\u7684\u7db2\u7ad9\uff0c\u4ee5\u9032\u884c\u8a8d\u8b49\u6536\u96c6\u6216\u767c\u4f48\u60e1\u610f\u8edf\u4ef6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-does-dns-tunneling-pose-a-security-risk\">DNS \u96a7\u9053\u5982\u4f55\u69cb\u6210\u5b89\u5168\u98a8\u96aa\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DNS \u96a7\u9053\u5141\u8a31\u653b\u64ca\u8005\u5728 DNS \u67e5\u8a62\u548c\u56de\u61c9\u4e2d\u96b1\u85cf\u5176\u901a\u8a0a\u3002\u9019\u6703\u589e\u52a0\u7d44\u7e54\u8b58\u5225\u8cc7\u6599\u5916\u6d29\u6216\u60e1\u610f\u7a0b\u5f0f\u547d\u4ee4\u8207\u63a7\u5236 (C2) \u8a0a\u606f\u7684\u96e3\u5ea6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-are-dangling-dns-records\">\u4ec0\u9ebc\u662f\u61f8\u639b\u5f0f DNS \u8a18\u9304\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7576\u7d44\u7e54\u5df2\u505c\u7528\u96f2\u7aef\u8cc7\u7522\u4f46\u6c92\u6709\u95dc\u806f\u7684 DNS \u8a18\u9304\u6642\uff0c\u6703\u5b58\u5728\u61f8\u639b\u5f0f DNS \u8a18\u9304\u3002\u8072\u7a31\u8207\u6b64\u8a18\u9304\u76f8\u95dc\u806f\u7684 IP \u4f4d\u5740\u6216\u5b8c\u5168\u5408\u683c\u7db2\u57df\u540d\u7a31 (FQDN) \u7684\u653b\u64ca\u8005\u53ef\u80fd\u6703\u5c07\u8a72\u5b50\u7db2\u57df\u9810\u5b9a\u7684\u6240\u6709\u6d41\u91cf\u91cd\u65b0\u5c0e\u5411\u5230\u60e1\u610f\u7db2\u7ad9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-can-integrating-dns-security-into-a-sase-framework-benefit-organizations\">\u5c07 DNS \u5b89\u5168\u6574\u5408\u5230 SASE \u6846\u67b6\u4e2d\u5982\u4f55\u4f7f\u7d44\u7e54\u53d7\u76ca\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c07 DNS \u6574\u5408\u5230 SASE \u6846\u67b6\u4e2d\u53ef\u9632\u6b62\u60e1\u610f DNS \u4f3a\u670d\u5668\uff0c\u4e26\u63d0\u4f9b DNS \u6d41\u91cf\u7684\u53ef\u898b\u6027\u3002\u56e0\u6b64\uff0c\u7d44\u7e54\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u5c01\u9396\u6307\u5411\u5df2\u77e5\u4e0d\u6b63\u78ba\u7db2\u57df\u7684\u6d41\u91cf\uff0c\u4e26\u5f37\u5236\u57f7\u884c\u516c\u53f8\u5b89\u5168\u6027\u539f\u5247\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-dns-security-needs-to-be-part-of-your-sase-strategy\">\u70ba\u4ec0\u9ebc DNS \u5b89\u5168\u6027\u9700\u8981\u6210\u70ba SASE \u7b56\u7565\u7684\u4e00\u90e8\u5206<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNS \u662f\u4e92\u806f\u7db2\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\uff0c\u4f46\u5b83\u4e26\u975e\u70ba\u4e86\u5b89\u5168\u800c\u8a2d\u8a08\u3002\u56e0\u6b64\uff0c\u653b\u64ca\u8005\u4ee5\u5404\u7a2e\u65b9\u5f0f\u5229\u7528 DNS \u4f86\u9032\u4e00\u6b65\u9032\u884c\u653b\u64ca\u6d3b\u52d5\u3002\u5c07 DNS \u5efa\u7f6e\u5230 SASE \u67b6\u69cb\u4e2d\uff0c\u53ef\u8b93\u7d44\u7e54\u5be6\u4f5c\u5f37\u5927\u7684 DNS \u5b89\u5168\u6027\u548c\u539f\u5247\u5f37\u5236\u57f7\u884c\uff0c\u4f5c\u70ba\u6574\u9ad4\u3001\u878d\u5408\u5f0f\u5b89\u5168\u6027\u67b6\u69cb\u7684\u4e00\u90e8\u5206\u3002\u9019\u53ef\u589e\u5f37\u5b89\u5168\u80fd\u898b\u5ea6\u3001\u7c21\u5316\u7b56\u7565\u57f7\u884c\uff0c\u4e26\u6539\u5584\u5a01\u8105\u5075\u6e2c\u548c\u56de\u61c9\u3002<br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u77ad\u89e3 Cato Networks \u5982\u4f55\u63d0\u4f9b DNS \u5c64\u5a01\u8105\u9632\u8b77\u4f5c\u70ba\u5b8c\u6574 SASE \u7b56\u7565\u7684\u4e00\u90e8\u5206\u3002<a 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