<\/span><\/h3>\n\n\n\nDNS \u8b93\u4f7f\u7528\u8005\u53ea\u9700\u8a18\u4f4f example.com \u9019\u985e\u6613\u8b80\u7684\u7db2\u5740\uff0c\u800c\u4e0d\u5fc5\u8f38\u5165\u96e3\u4ee5\u8a18\u61b6\u7684\u6578\u5b57 IP \u4f4d\u5740\uff08\u5982 192.0.2.1\uff09\u3002\u9019\u9805\u6280\u8853\u5927\u5e45\u7c21\u5316\u4e86\u4f7f\u7528\u6d41\u7a0b\uff0c\u8b93\u7db2\u8def\u6210\u70ba\u4eba\u4eba\u90fd\u80fd\u8f15\u9b06\u4e0a\u624b\u7684\u5de5\u5177\u3002<\/p>\n\n\n\n
\u6b64\u5916\uff0cDNS \u5feb\u53d6\u8207\u9ad8\u6548\u7684 DNS \u4f3a\u670d\u5668\u4e5f\u80fd\u7e2e\u77ed\u7db2\u9801\u8f09\u5165\u6642\u9593\uff0c\u63d0\u5347\u7db2\u7ad9\u9023\u7dda\u901f\u5ea6\u8207\u6574\u9ad4\u9ad4\u9a57<\/strong>\u3002\u82e5\u9078\u7528\u512a\u8cea\u7684 DNS \u670d\u52d9\uff0c\u80fd\u9032\u4e00\u6b65\u512a\u5316\u5168\u7403\u4f7f\u7528\u8005\u7684\u9023\u7dda\u6548\u80fd\u3002<\/p>\n\n\n\n<\/span>2. \u7db2\u7ad9\u8207\u670d\u52d9\u7ba1\u7406\u7684\u4e2d\u6a1e<\/strong><\/span><\/h3>\n\n\n\n\u5c0d\u4f01\u696d\u8207\u958b\u767c\u8005\u800c\u8a00\uff0cDNS \u4e0d\u53ea\u662f\u5c0e\u822a\u5de5\u5177\uff0c\u66f4\u662f\u6574\u5408\u8207\u7ba1\u7406\u7db2\u7ad9\u670d\u52d9\u7684\u6838\u5fc3\u5de5\u5177<\/strong>\uff1a<\/p>\n\n\n\n\n- \u8a2d\u5b9a\u5b50\u7db2\u57df\uff08Subdomain\uff09<\/strong>\uff1a\u53ef\u900f\u904e DNS \u5c07 shop.example.com\u3001blog.example.com \u7b49\u6307\u5411\u4e0d\u540c\u4e3b\u6a5f\u6216\u61c9\u7528\u7cfb\u7d71\u3002
<\/li>\n\n\n\n- \u90f5\u4ef6\u4f3a\u670d\u5668\u7ba1\u7406<\/strong>\uff1a\u900f\u904e MX \u7d00\u9304\uff08Mail Exchanger\uff09\uff0c\u4f01\u696d\u80fd\u5920\u6307\u5b9a\u90f5\u4ef6\u8655\u7406\u7684\u4f3a\u670d\u5668\u4f4d\u7f6e\uff0c\u662f\u5efa\u7f6e\u4f01\u696d\u4fe1\u7bb1\u4e0d\u53ef\u6216\u7f3a\u7684\u8a2d\u5b9a\u4e4b\u4e00\u3002
<\/li>\n\n\n\n- \u61c9\u7528\u5c0e\u5411\u8a2d\u5b9a<\/strong>\uff1a\u50cf\u662f CNAME\u3001TXT \u7b49\u7d00\u9304\u80fd\u652f\u63f4\u591a\u7a2e\u61c9\u7528\u670d\u52d9\uff0c\u4f8b\u5982\u7db2\u57df\u9a57\u8b49\uff08Google\u3001Facebook\uff09\u3001Email \u9632\u507d\u6a5f\u5236\uff08SPF\u3001DKIM\uff09\u7b49\u3002
<\/li>\n<\/ul>\n\n\n\n<\/span>3. \u8cc7\u5b89\u9632\u8b77\u7684\u91cd\u8981\u4e00\u74b0<\/strong><\/span><\/h3>\n\n\n\n\u96a8\u8457\u8cc7\u5b89\u5a01\u8105\u5347\u9ad8\uff0cDNS \u4e5f\u6210\u70ba\u4fdd\u8b77\u4f01\u696d\u8207\u7528\u6236\u5b89\u5168\u7684\u7b2c\u4e00\u9053\u9632\u7dda\u3002\u900f\u904e\u5148\u9032\u7684 DNS \u5b89\u5168\u6280\u8853\uff0c\u53ef\u4ee5\u964d\u4f4e\u4e0b\u5217\u98a8\u96aa\uff1a<\/p>\n\n\n\n
\n- \u9632\u6b62 DNS Spoofing \/ Poisoning<\/strong>\uff1a\u5229\u7528 DNSSEC\uff08DNS Security Extensions\uff09\u53ef\u9a57\u8b49 DNS \u8cc7\u6599\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u99ed\u5ba2\u5c07\u7db2\u7ad9\u5c0e\u5411\u5047\u5192 IP\u3002
<\/li>\n\n\n\n- \u9632\u79a6\u60e1\u610f\u7db2\u57df\u9023\u7dda<\/strong>\uff1a\u7d50\u5408 DNS \u9632\u706b\u7246\uff08\u5982 Umbrella\u3001Quad9\uff09\u53ef\u963b\u64cb\u5b58\u53d6\u5df2\u77e5\u7684\u60e1\u610f\u7db2\u7ad9\uff0c\u6e1b\u5c11\u54e1\u5de5\u8aa4\u9ede\u91e3\u9b5a\u9023\u7d50\u7684\u98a8\u96aa\u3002
<\/li>\n\n\n\n- DDoS \u4fdd\u8b77<\/strong>\uff1a\u9ad8\u54c1\u8cea\u7684 DNS \u4ee3\u7ba1\u670d\u52d9\uff08\u5982 Cloudflare DNS\u3001AWS Route 53\uff09\u5177\u5099\u9632 DDoS \u80fd\u529b\uff0c\u4fdd\u969c\u7db2\u7ad9\u7a69\u5b9a\u6027\u8207\u53ef\u7528\u6027\u3002
<\/li>\n<\/ul>\n\n\n\n<\/span>4. \u591a\u88dd\u7f6e\u8207\u5206\u6563\u5f0f\u67b6\u69cb\u7684\u652f\u6490\u57fa\u790e<\/strong><\/span><\/h3>\n\n\n\n\u5728\u73fe\u4ee3\u7db2\u8def\u67b6\u69cb\u4e2d\uff0c\u4f01\u696d\u7d93\u5e38\u4f7f\u7528\u591a\u5340\u57df\u4f3a\u670d\u5668\u3001CDN \u5167\u5bb9\u52a0\u901f\u3001\u96f2\u7aef\u90e8\u7f72\u7b49\u65b9\u5f0f\u4f86\u512a\u5316\u670d\u52d9\u3002\u800c DNS \u5c31\u662f\u5f48\u6027\u90e8\u7f72\u8207\u5feb\u901f\u5207\u63db\u7684\u6838\u5fc3\u5de5\u5177<\/strong>\uff1a<\/p>\n\n\n\n\n- \u53ef\u4f9d\u64da\u8a2a\u5ba2\u6240\u5728\u5340\u57df\uff0c\u900f\u904e GeoDNS \u5c07\u5176\u5c0e\u5411\u6700\u8fd1\u7684\u7bc0\u9ede\uff0c\u52a0\u901f\u5b58\u53d6\u3002
<\/li>\n\n\n\n - \u7576\u67d0\u500b\u4f3a\u670d\u5668\u6545\u969c\u6642\uff0c\u53ef\u5373\u6642\u66f4\u65b0 DNS \u6307\u5411\u65b0\u7684\u4e3b\u6a5f\uff0c\u63d0\u9ad8\u670d\u52d9\u53ef\u9760\u6027\u3002
<\/li>\n\n\n\n - \u53ef\u900f\u904e DNS \u5c0e\u5165 A\/B \u6e2c\u8a66\u6d41\u91cf\u3001\u8ca0\u8f09\u5e73\u8861\u8207\u5bb9\u932f\u8a2d\u8a08\u3002<\/li>\n<\/ul>\n\n\n\n
<\/span>\u4e94\u3001DNS \u81ea\u7ba1\u548c\u4ee3\u7ba1\u5dee\u7570<\/strong><\/span><\/h2>\n\n\n\n\u5728\u5efa\u7f6e\u7db2\u7ad9\u6216\u7db2\u8def\u670d\u52d9\u6642\uff0c\u4f60\u53ef\u4ee5\u9078\u64c7\u300c\u81ea\u884c\u7ba1\u7406 DNS\uff08\u81ea\u7ba1\uff09\u300d\u6216\u300c\u59d4\u8a17\u7b2c\u4e09\u65b9\u4ee3\u7ba1 DNS\uff08\u4ee3\u7ba1\uff09\u300d\u3002\u9019\u5169\u7a2e\u65b9\u5f0f\u5404\u6709\u512a\u7f3a\u9ede\uff0c\u4ee5\u4e0b\u8aaa\u660e\u80fd\u5e6b\u52a9\u4f60\u8a55\u4f30\u54ea\u7a2e\u6700\u9069\u5408\u4f60\u7684\u9700\u6c42\u3002<\/p>\n\n\n\n
<\/span>1. DNS \u81ea\u7ba1\uff08Self-Hosted DNS\uff09<\/strong><\/span><\/h3>\n\n\n\nDNS \u81ea\u7ba1\u662f\u6307\u81ea\u884c\u5728\u4f3a\u670d\u5668\u4e0a\u5efa\u7f6e\u4e26\u7dad\u8b77 DNS \u7cfb\u7d71\u3002\u901a\u5e38\u4f01\u696d\u6216\u5927\u578b\u7d44\u7e54\u6703\u63a1\u7528\u9019\u7a2e\u65b9\u5f0f\uff0c\u64c1\u6709\u66f4\u9ad8\u7684\u63a7\u5236\u6b0a\u8207\u81ea\u8a02\u6027\u3002<\/p>\n\n\n\n
\u512a\u9ede\uff1a<\/strong><\/p>\n\n\n\n