\r\n#!\/bin\/bash\r\n# DNS \u4ea4\u53c9\u9a8c\u8bc1\u811a\u672c\r\nPRIMARY_DNS=\"8.8.8.8\"\r\nSECONDARY_DNS=\"1.1.1.1\"\r\nTARGET_DOMAIN=\"yourdomain.com\"\r\n\r\n# \u6bd4\u8f83\u89e3\u6790\u7ed3\u679c\r\nprimary_ip=$(dig @$PRIMARY_DNS $TARGET_DOMAIN +short)\r\nsecondary_ip=$(dig @$SECONDARY_DNS $TARGET_DOMAIN +short)\r\n\r\nif [ \"$primary_ip\" != \"$secondary_ip\" ]; then\r\n    echo \"\u8b66\u544a\uff1a\u68c0\u6d4b\u5230 DNS \u89e3\u6790\u4e0d\u5339\u914d\"\r\n    echo \"\u4e3b DNS\uff1a$primary_ip\"\r\n    echo \"\u5907\u7528 DNS\uff1a$secondary_ip\"\r\nfi\r\n        <\/code><\/pre>\n
\u9ad8\u7ea7\u68c0\u6d4b\u6280\u672f<\/strong><\/h2>\n
\u5bf9\u4e8e\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\uff0c\u5b9e\u65bd\u8fd9\u4e9b\u9ad8\u7ea7\u68c0\u6d4b\u65b9\u6cd5\u53ef\u4ee5\u63d0\u4f9b DNS \u52ab\u6301\u5c1d\u8bd5\u7684\u65e9\u671f\u8b66\u544a\uff1a<\/p>\n
DNSSEC \u9a8c\u8bc1\u68c0\u67e5<\/h3>\n
\r\n# \u68c0\u67e5 DNSSEC \u9a8c\u8bc1\r\ndig +dnssec yourdomain.com\r\n# \u5728\u5e94\u7b54\u90e8\u5206\u67e5\u627e RRSIG \u8bb0\u5f55\r\n        <\/code><\/pre>\n
\u5173\u952e\u9a8c\u8bc1\u70b9\uff1a<\/p>\n
\n
RRSIG \u5b58\u5728\u6027\u548c\u6709\u6548\u6027<\/li>\n
\u4fe1\u4efb\u94fe\u9a8c\u8bc1<\/li>\n
TTL \u4e00\u81f4\u6027\u68c0\u67e5<\/li>\n<\/ul>\n
\u5b9e\u65f6\u76d1\u63a7\u8bbe\u7f6e<\/h3>\n
\r\n# Python \u6301\u7eed DNS \u76d1\u63a7\u4ee3\u7801\u7247\u6bb5\r\nimport dns.resolver\r\nimport time\r\n\r\ndef monitor_dns(domain, interval=300):\r\n    resolver = dns.resolver.Resolver()\r\n    resolver.nameservers = ['8.8.8.8']\r\n    \r\n    while True:\r\n        try:\r\n            answer = resolver.resolve(domain, 'A')\r\n            print(f\"\u89e3\u6790\u7ed3\u679c: {[str(rdata) for rdata in answer]}\")\r\n            time.sleep(interval)\r\n        except Exception as e:\r\n            print(f\"\u9519\u8bef: {e}\")\r\n        <\/code><\/pre>\n
\u81ea\u52a8\u6d4b\u8bd5\u5b9e\u73b0<\/strong><\/h2>\n
\u4f7f\u7528\u8fd9\u4e2a\u7ec4\u5408\u591a\u79cd\u68c0\u6d4b\u65b9\u6cd5\u7684 shell \u811a\u672c\u5b9e\u73b0\u81ea\u52a8 DNS \u5065\u5eb7\u68c0\u67e5\uff1a<\/p>\n
\r\n#!\/bin\/bash\r\n# \u7efc\u5408 DNS \u5065\u5eb7\u68c0\u67e5\r\ncheck_dns() {\r\n    local domain=$1\r\n    local expected_ip=$2\r\n    \r\n    # \u591a DNS \u670d\u52a1\u5668\u68c0\u67e5\r\n    servers=(\"8.8.8.8\" \"1.1.1.1\" \"208.67.222.222\")\r\n    \r\n    for server in \"${servers[@]}\"; do\r\n        result=$(dig @$server +short $domain)\r\n        if [ \"$result\" != \"$expected_ip\" ]; then\r\n            echo \"\u8b66\u544a\uff1a\u5728 $server \u4e0a\u53d1\u73b0\u7591\u4f3c DNS \u52ab\u6301\"\r\n            echo \"\u9884\u671f: $expected_ip\"\r\n            echo \"\u83b7\u5f97: $result\"\r\n        fi\r\n    done\r\n}\r\n        <\/code><\/pre>\n
\u9884\u9632\u63aa\u65bd\u548c\u6700\u4f73\u5b9e\u8df5<\/strong><\/h2>\n
\u5bf9\u4e8e\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u548c\u670d\u52a1\u5668\u6258\u7ba1\u8bbe\u65bd\uff0c\u5b9e\u65bd\u5f3a\u5927\u7684 DNS \u5b89\u5168\u63aa\u65bd\u81f3\u5173\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u52a0\u5f3a DNS \u57fa\u7840\u8bbe\u65bd\u7684\u7cfb\u7edf\u65b9\u6cd5\uff1a<\/p>\n
DNS \u670d\u52a1\u5668\u914d\u7f6e<\/h3>\n
\r\n# BIND \u589e\u5f3a\u5b89\u5168\u6027\u914d\u7f6e\u7247\u6bb5\r\noptions {\r\n    version \"not available\";\r\n    allow-transfer {\"none\";};\r\n    recursion no;\r\n    dnssec-validation auto;\r\n    rate-limit {\r\n        responses-per-second 10;\r\n        window 5;\r\n    };\r\n};\r\n        <\/code><\/pre>\n
\u76d1\u63a7\u8bbe\u7f6e<\/h3>\n
\r\n# Prometheus \u76d1\u63a7\u914d\u7f6e\r\nscrape_configs:\r\n  - job_name: 'dns_monitor'\r\n    metrics_path: '\/metrics'\r\n    static_configs:\r\n      - targets: ['dns1:9153', 'dns2:9153']\r\n    relabel_configs:\r\n      - source_labels: [__address__]\r\n        target_label: instance\r\n        <\/code><\/pre>\n
\u57fa\u672c\u5b89\u5168\u63aa\u65bd\u5305\u62ec\uff1a<\/p>\n
\n
\u5b9a\u671f DNSSEC \u5bc6\u94a5\u8f6e\u6362<\/li>\n
DNS \u67e5\u8be2\u65e5\u5fd7\u8bb0\u5f55\u548c\u5206\u6790<\/li>\n
\u54cd\u5e94\u901f\u7387\u9650\u5236\uff08RRL\uff09<\/li>\n
\u8bbf\u95ee\u63a7\u5236\u5217\u8868\uff08ACLs\uff09<\/li>\n<\/ul>\n
\u5e38\u89c1\u95ee\u9898\u6545\u969c\u6392\u9664<\/strong><\/h2>\n
\u5904\u7406\u7591\u4f3c DNS \u52ab\u6301\u65f6\uff0c\u8bf7\u9075\u5faa\u6b64\u8bca\u65ad\u6d41\u7a0b\u56fe\uff1a<\/p>\n
\r\n1. \u9a8c\u8bc1 DNS \u89e3\u6790\r\n   \u2514\u2500\u2500 \u68c0\u67e5\u591a\u4e2a\u6743\u5a01\u670d\u52a1\u5668\r\n       \u251c\u2500\u2500 \u5339\u914d\uff1a\u7ee7\u7eed\u76d1\u63a7\r\n       \u2514\u2500\u2500 \u4e0d\u5339\u914d\uff1a\r\n           \u251c\u2500\u2500 \u68c0\u67e5 DNSSEC\r\n           \u2502   \u251c\u2500\u2500 \u6709\u6548\uff1a\u7f51\u7edc\u95ee\u9898\r\n           \u2502   \u2514\u2500\u2500 \u65e0\u6548\uff1a\u53ef\u80fd\u5b58\u5728\u52ab\u6301\r\n           \u2514\u2500\u2500 \u5b9e\u65bd\u7f13\u89e3\u63aa\u65bd\r\n\r\n2. \u54cd\u5e94\u9a8c\u8bc1\r\n   \u2514\u2500\u2500 \u6bd4\u8f83 TTL \u503c\r\n       \u251c\u2500\u2500 \u4e00\u81f4\uff1a\u6b63\u5e38\r\n       \u2514\u2500\u2500 \u4e0d\u4e00\u81f4\uff1a\u8c03\u67e5\u7f13\u5b58\r\n        <\/code><\/pre>\n
\u7ed3\u8bba\u548c\u672a\u6765\u8003\u8651<\/strong><\/h2>\n
DNS \u52ab\u6301\u68c0\u6d4b\u9700\u8981\u591a\u5c42\u6b21\u65b9\u6cd5\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u9762\u4e34\u72ec\u7279\u6311\u6218\u7684\u9999\u6e2f\u670d\u52a1\u5668\u73af\u5883\u3002\u5b9a\u671f\u76d1\u63a7\u3001\u81ea\u52a8\u5316\u6d4b\u8bd5\u548c\u9002\u5f53\u7684\u914d\u7f6e\u7ba1\u7406\u6784\u6210\u4e86\u6709\u6548 DNS \u5b89\u5168\u6027\u7684\u57fa\u7840\u3002<\/p>\n
\u8bf7\u8bb0\u4f4f\u5b9a\u671f\u66f4\u65b0\u60a8\u7684 DNS \u5b89\u5168\u534f\u8bae\uff0c\u5e76\u6301\u7eed\u5173\u6ce8\u670d\u52a1\u5668\u79df\u7528\u548c DNS \u5b89\u5168\u9886\u57df\u7684\u65b0\u5174\u5a01\u80c1\u3002\u5bf9\u4e8e\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u5b9e\u65bd\u8fd9\u4e9b\u68c0\u6d4b\u548c\u9884\u9632\u65b9\u6cd5\u53ef\u4ee5\u663e\u8457\u964d\u4f4e DNS \u52ab\u6301\u653b\u51fb\u7684\u98ce\u9669\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
DNS \u52ab\u6301\u5df2\u6210\u4e3a\u9999\u6e2f\u670d\u52a1\u5668\u7ba1\u7406\u5458\u7684\u4e00\u4e2a\u5173\u952e\u95ee\u9898\uff0c\u7279\u522b\u662f\u5bf9\u670d\u52a1\u5668\u79df\u7528\u548c\u670d\u52a1\u5668\u6258\u7ba1\u670d\u52a1\u9020\u6210\u5f71\u54cd\u3002\u5f53\u60a8\u7684 DNS \u67e5\u8be2\u88ab\u62e6\u622a\u5e76\u91cd\u5b9a\u5411\u5230\u9519\u8bef\u7684 IP \u5730\u5740\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e25\u91cd\u7684\u5b89\u5168\u9690\u60a3\u548c\u670d\u52a1\u4e2d\u65ad\u3002\u672c\u7efc\u5408\u6307\u5357\u5c06\u63a2\u8ba8\u4f7f\u7528\u5f00\u53d1\u4eba\u5458\u53cb\u597d\u7684\u65b9\u6cd5\u548c\u547d\u4ee4\u884c\u5de5\u5177\u6765\u68c0\u6d4b DNS \u52ab\u6301\u7684\u5b9e\u7528\u65b9\u6cd5\u3002 \u7406\u89e3 DNS \u52ab\u6301\u57fa\u7840\u77e5\u8bc6 DNS \u52ab\u6301\u53d1\u751f\u5728\u6076\u610f\u653b\u51fb\u8005\u5c06\u635f\u574f\u7684 DNS \u4fe1\u606f\u6ce8\u5165\u670d\u52a1\u5668\u7f13\u5b58\u65f6\uff0c\u5bfc\u81f4 DNS \u67e5\u8be2\u8fd4\u56de\u9519\u8bef\u7684 IP \u5730\u5740\u3002\u4e0e\u4f20\u7edf\u7684 DDoS \u653b\u51fb\u4e0d\u540c\uff0cDNS \u52ab\u6301\u53ef\u80fd\u66f4\u52a0\u9690\u853d\u548c\u6301\u4e45\uff0c\u8fd9\u4f7f\u5f97\u68c0\u6d4b\u5bf9\u7ef4\u62a4\u670d\u52a1\u5668\u5b8c\u6574\u6027\u81f3\u5173\u91cd\u8981\u3002 \u5173\u952e\u6280\u672f\u65b9\u9762\u5305\u62ec\uff1a \u7f13\u5b58\u6ce8\u5165\u5411\u91cf DNS \u89e3\u6790\u8def\u5f84\u64cd\u4f5c TTL\uff08\u751f\u5b58\u65f6\u95f4\uff09\u5229\u7528 \u54cd\u5e94\u7ade\u4e89\u6761\u4ef6 DNS \u52ab\u6301\u7684\u5e38\u89c1\u75c7\u72b6 \u5728\u6df1\u5165\u63a2\u8ba8\u68c0\u6d4b\u65b9\u6cd5\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u5148\u68c0\u67e5\u9999\u6e2f\u670d\u52a1\u5668\u53ef\u80fd\u906d\u53d7 DNS \u52ab\u6301\u7684\u6280\u672f\u6307\u6807\uff1a # \u6b63\u5e38 DNS \u89e3\u6790 $ dig example.com ;; ANSWER SECTION: example.com. IN A 93.184.216.34 # \u88ab\u52ab\u6301\u7684 DNS \u89e3\u6790\uff08\u793a\u4f8b\uff09 $ dig example.com ;; […]<\/p>\n
Read More…<\/a><\/p>\n","protected":false},"author":3,"featured_media":20468,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62],"tags":[5313,5312,5314,5048,2696],"class_list":["post-20471","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-sc","tag-hong-kong-server-dns-sc","tag-dns-poisoning-detection-sc","tag-dns-monitoring-sc","tag-5048","tag-dns-troubleshooting-sc"],"acf":[],"yoast_head":"\n