\u8ba9\u6211\u4eec\u63a2\u7d22\u4e00\u4e2a\u4f7f\u7528 dig \u53d1\u73b0\u6f5c\u5728\u4e0d\u4e00\u81f4\u7684\u5b9e\u9645\u4f8b\u5b50\uff1a<\/p>\n

dig +short example.com @8.8.8.8\r\ndig +short example.com @1.1.1.1<\/code><\/pre>\n
\u8fd4\u56de\u7684 IP \u5730\u5740\u7684\u5dee\u5f02\u53ef\u80fd\u4f5c\u4e3a\u6f5c\u5728\u57df\u6c61\u67d3\u7684\u8b66\u544a\u4fe1\u53f7\u3002\u5b9a\u671f\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u8fdb\u884c\u5ba1\u8ba1\u6784\u6210\u4e86\u5bf9\u6297\u72e1\u733e\u6570\u5b57\u653b\u51fb\u7684\u524d\u7ebf\u9632\u5fa1\u3002<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n
\u52a0\u56fa\u5821\u5792\uff1a\u670d\u52a1\u5668\u7aef\u89e3\u51b3\u65b9\u6848<\/strong><\/h2>\n
1. \u91c7\u7528 HTTPS \u4e0a\u7684 DNS\uff08DoH\uff09<\/h3>\n
DoH \u7528 HTTPS \u52a0\u5bc6\u5305\u88f9\u4f60\u7684 DNS \u67e5\u8be2\uff0c\u4f7f\u5176\u514d\u53d7\u7aa5\u63a2\u3002\u4f7f\u7528 cloudflared \u5728\u4f60\u7684 Linux \u670d\u52a1\u5668\u4e0a\u5b9e\u65bd DoH\uff1a<\/p>\n
sudo apt-get update && sudo apt-get install cloudflared\r\nsudo cloudflared proxy-dns --port 53 --upstream https:\/\/1.1.1.1\/dns-query --upstream https:\/\/1.0.0.1\/dns-query<\/code><\/pre>\n
2. \u52a0\u5bc6\u57df\u540d\u89e3\u6790\uff1a\u5b89\u5168\u66ff\u4ee3\u65b9\u6848<\/h3>\n
\u867d\u7136 DoH \u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u4fdd\u62a4\uff0c\u4f46\u4f20\u8f93\u5c42\u5b89\u5168\u6027\uff08TLS\uff09\u4e3a\u67e5\u8be2\u52a0\u5bc6\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u5316\u7684\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u8fd9\u79cd\u5b89\u5168\u65b9\u6cd5\u8bbe\u7f6e Unbound\uff1a<\/p>\n
sudo apt-get install unbound\r\nsudo nano \/etc\/unbound\/unbound.conf<\/code><\/pre>\n
\u5c06\u4ee5\u4e0b\u5185\u5bb9\u6dfb\u52a0\u5230\u4f60\u7684\u914d\u7f6e\u4e2d\uff1a<\/p>\n
server:\r\n  tls-cert-bundle: \/etc\/ssl\/certs\/ca-certificates.crt\r\nforward-zone:\r\n  name: \".\"\r\n  forward-tls-upstream: yes\r\n  forward-addr: 1.1.1.1@853#cloudflare-dns.com\r\n  forward-addr: 1.0.0.1@853#cloudflare-dns.com<\/code><\/pre>\n
\u91cd\u542f Unbound \u4ee5\u5e94\u7528\u66f4\u6539\uff1a<\/p>\n
sudo systemctl restart unbound<\/code><\/pre>\n
\u8fd9\u79cd\u8bbe\u7f6e\u786e\u4fdd\u4f60\u7684\u57df\u540d\u67e5\u8be2\u88ab\u52a0\u5bc6\uff0c\u589e\u5f3a\u4e86\u7f51\u7edc\u901a\u4fe1\u7684\u9690\u79c1\u548c\u5b89\u5168\u6027\u3002<\/p>\n
3. \u8ba4\u8bc1\u52a0\u5bc6\uff1a\u589e\u5f3a\u67e5\u8be2\u5b89\u5168\u6027<\/h3>\n
\u4e3a\u60a8\u7684\u57df\u540d\u89e3\u6790\u901a\u4fe1\u6dfb\u52a0\u8ba4\u8bc1\u63d0\u4f9b\u4e86\u989d\u5916\u7684\u5b89\u5168\u5c42\u3002\u5728 Ubuntu \u4e0a\u90e8\u7f72\u8fd9\u79cd\u589e\u5f3a\u7684\u534f\u8bae\uff1a<\/p>\n
sudo apt-get install dnscrypt-proxy\r\nsudo systemctl start dnscrypt-proxy\r\nsudo systemctl enable dnscrypt-proxy<\/code><\/pre>\n
\u8fd9\u79cd\u8bbe\u7f6e\u5c06\u52a0\u5bc6\u4e0e\u8ba4\u8bc1\u76f8\u7ed3\u5408\uff0c\u4e3a\u6f5c\u5728\u7684\u7be1\u6539\u6216\u7f51\u7edc\u67e5\u8be2\u62e6\u622a\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u9632\u5fa1\u3002\u5b83\u786e\u4fdd\u54cd\u5e94\u6765\u81ea\u5408\u6cd5\u6765\u6e90\uff0c\u8fdb\u4e00\u6b65\u589e\u5f3a\u4e86\u60a8\u7684\u6570\u5b57\u57fa\u7840\u8bbe\u65bd\u7684\u5b8c\u6574\u6027\u3002<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n
\u7f51\u7edc\u7ea7\u9632\u5fa1\uff1a\u6570\u5b57\u62a4\u57ce\u6cb3<\/strong><\/h2>\n
1. CDN \u96c6\u6210\uff1a\u901f\u5ea6\u4e0e\u5b89\u5168\u5e76\u91cd<\/h3>\n
\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\u5145\u5f53\u5206\u5e03\u5f0f\u5c4f\u969c\uff0c\u5728\u6076\u610f\u6d41\u91cf\u5230\u8fbe\u60a8\u7684\u670d\u52a1\u5668\u4e4b\u524d\u5438\u6536\u548c\u8fc7\u6ee4\u5b83\u3002\u50cf Cloudflare\u3001Akamai \u548c Amazon CloudFront \u7b49\u6d41\u884c\u9009\u9879\u63d0\u4f9b\u5f3a\u5927\u7684 DNS \u5b89\u5168\u529f\u80fd\uff0c\u540c\u65f6\u5e26\u6765\u6027\u80fd\u4f18\u52bf\u3002<\/p>\n
2. Anycast DNS\uff1a\u5206\u5e03\u5f0f\u5f39\u6027<\/h3>\n
\u5b9e\u65bd Anycast DNS\uff0c\u5c06\u60a8\u7684 DNS \u57fa\u7840\u8bbe\u65bd\u5206\u5e03\u5728\u591a\u4e2a\u5730\u7406\u4f4d\u7f6e\uff0c\u521b\u5efa\u4e00\u4e2a\u66f4\u96be\u88ab\u653b\u7834\u7684\u5f39\u6027\u7f51\u7edc\uff1a<\/p>\n
; Example Anycast DNS configuration for BIND\r\noptions {\r\n  listen-on port 53 { any; };\r\n  allow-query { any; };\r\n  recursion no;\r\n};\r\n\r\nzone \"example.com\" {\r\n  type master;\r\n  file \"\/etc\/bind\/zones\/example.com.zone\";\r\n};\r\n<\/code><\/pre>\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n
DNSSEC\uff1a\u5bc6\u7801\u5b66\u76fe\u724c<\/strong><\/h2>\n
DNSSEC \u4e3a DNS \u8bb0\u5f55\u6dfb\u52a0\u52a0\u5bc6\u7b7e\u540d\uff0c\u786e\u4fdd\u5176\u771f\u5b9e\u6027\u3002\u5728\u60a8\u7684\u6743\u5a01 DNS \u670d\u52a1\u5668\u4e0a\u5b9e\u65bd DNSSEC\uff1a<\/p>\n
dnssec-keygen -a RSASHA256 -b 2048 -n ZONE example.com\r\ndnssec-keygen -f KSK -a RSASHA256 -b 4096 -n ZONE example.com\r\ndnssec-signzone -A -3 $(head -c 1000 \/dev\/random | sha1sum | cut -b 1-16) -N INCREMENT -o example.com -t example.com.zone<\/code><\/pre>\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n
\u81ea\u52a8\u5316 DNS \u5b89\u5168\uff1a\u8b66\u89c9\u7684\u54e8\u5175<\/strong><\/h2>\n
\u5229\u7528\u81ea\u52a8\u5316\u6765\u4fdd\u6301\u5bf9 DNS \u57fa\u7840\u8bbe\u65bd\u7684\u6301\u7eed\u8b66\u60d5\u3002\u8fd9\u91cc\u6709\u4e00\u4e2a\u7b80\u5355\u7684 Python \u811a\u672c\u6765\u76d1\u63a7 DNS \u89e3\u6790\u5e76\u5728\u53d8\u5316\u65f6\u53d1\u51fa\u8b66\u62a5\uff1a<\/p>\n
import dns.resolver\r\nimport smtplib\r\nfrom email.mime.text import MIMEText\r\n\r\ndef check_dns(domain, expected_ip):\r\n    try:\r\n        answers = dns.resolver.resolve(domain, 'A')\r\n        for rdata in answers:\r\n            if str(rdata) != expected_ip:\r\n                send_alert(domain, expected_ip, str(rdata))\r\n    except Exception as e:\r\n        send_alert(domain, expected_ip, str(e))\r\n\r\ndef send_alert(domain, expected_ip, actual_ip):\r\n    msg = MIMEText(f\"DNS change detected for {domain}. Expected: {expected_ip}, Actual: {actual_ip}\")\r\n    msg['Subject'] = f\"DNS Alert: {domain}\"\r\n    msg['From'] = \"alert@yourdomain.com\"\r\n    msg['To'] = \"admin@yourdomain.com\"\r\n\r\n    s = smtplib.SMTP('localhost')\r\n    s.send_message(msg)\r\n    s.quit()\r\n\r\ncheck_dns('example.com', '192.0.2.1')\r\n<\/code><\/pre>\n
\u4f7f\u7528 cron \u6216\u7c7b\u4f3c\u7684\u4f5c\u4e1a\u8c03\u5ea6\u5668\u5b9a\u671f\u8fd0\u884c\u6b64\u811a\u672c\u3002<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n
\u672a\u6765\u4e4b\u8def\uff1a\u6570\u5b57\u57df\u540d\u5b89\u5168\u7684\u65b0\u5174\u8d8b\u52bf<\/strong><\/h2>\n
\u968f\u7740\u7f51\u7edc\u73af\u5883\u7684\u6f14\u53d8\uff0c\u6211\u4eec\u7684\u9632\u5fa1\u7b56\u7565\u5fc5\u987b\u540c\u6b65\u9002\u5e94\u3002\u5bc6\u5207\u5173\u6ce8\u8fd9\u4e9b\u57df\u540d\u7cfb\u7edf\u4fdd\u62a4\u7684\u65b0\u5174\u8d8b\u52bf\uff1a<\/p>\n
\n
\u4eba\u5de5\u667a\u80fd\u9a71\u52a8\u7684\u7f51\u7edc\u5206\u6790\uff0c\u7528\u4e8e\u5b9e\u65f6\u5a01\u80c1\u68c0\u6d4b<\/li>\n
\u57fa\u4e8e\u533a\u5757\u94fe\u7684\u89e3\u6790\u7cfb\u7edf\uff0c\u589e\u5f3a\u5b8c\u6574\u6027\u548c\u5f39\u6027<\/li>\n
\u6297\u91cf\u5b50\u5bc6\u7801\u7b97\u6cd5\uff0c\u7528\u4e8e\u672a\u6765\u9632\u62a4\u7684\u6570\u5b57\u57fa\u7840\u8bbe\u65bd\u5b89\u5168<\/li>\n<\/ul>\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n
\u7ed3\u8bba\uff1a\u6570\u5b57\u65f6\u4ee3\u7684\u8b66\u60d5<\/strong><\/h2>\n
\u5728\u4e0d\u65ad\u53d8\u5316\u7684\u4e92\u8054\u7f51\u6c99\u5730\u4e0a\uff0cDNS \u6c61\u67d3\u4ecd\u7136\u662f\u4e00\u4e2a\u6301\u7eed\u7684\u5a01\u80c1\u3002\u901a\u8fc7\u5b9e\u65bd\u8fd9\u4e9b\u5148\u8fdb\u6280\u672f\u5e76\u4fdd\u6301\u575a\u5b9a\u7684\u8b66\u60d5\uff0c\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u9488\u5bf9 DNS \u653b\u51fb\u7684\u5f3a\u5927\u9632\u5fa1\u3002\u8bf7\u8bb0\u4f4f\uff0c\u5728\u7f51\u7edc\u5b89\u5168\u9886\u57df\uff0c\u504f\u6267\u4e0d\u4ec5\u662f\u8c28\u614e\u7684\u2014\u2014\u5b83\u662f\u5fc5\u8981\u7684\u3002<\/p>\n
\u4fdd\u6301\u597d\u5947\uff0c\u4e0d\u65ad\u5b66\u4e60\uff0c\u613f\u60a8\u7684 DNS \u89e3\u6790\u6c38\u8fdc\u4fdd\u6301\u771f\u5b9e\u3002\u4e3a\u4e0d\u5b89\u5168\u4e16\u754c\u4e2d\u7684\u5b89\u5168\u670d\u52a1\u5668\u79df\u7528\u5e72\u676f\uff01<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
[vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u5728\u6570\u5b57\u9886\u57df\uff0cDNS \u6c61\u67d3\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u5bf9\u624b\uff0c\u5a01\u80c1\u7740\u670d\u52a1\u5668\u79df\u7528\u670d\u52a1\u548c\u66f4\u5e7f\u6cdb\u7684\u4e92\u8054\u7f51\u751f\u6001\u7cfb\u7edf\u7684\u5b8c\u6574\u6027\u3002\u4f5c\u4e3a\u7f51\u7edc\u57fa\u7840\u8bbe\u65bd\u7684\u5b88\u62a4\u8005\uff0c\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u5fc5\u987b\u6b66\u88c5\u81ea\u5df1\uff0c\u638c\u63e1\u77e5\u8bc6\u548c\u5de5\u5177\u6765\u68c0\u6d4b\u3001\u9884\u9632\u548c\u6d88\u9664 DNS \u653b\u51fb\u3002\u8fd9\u4efd\u5168\u9762\u7684\u6307\u5357\u6df1\u5165\u63a2\u8ba8\u4e86 DNS \u6c61\u67d3\u7684\u590d\u6742\u6027\uff0c\u4e3a\u60a8\u63d0\u4f9b\u5c16\u7aef\u7b56\u7565\u6765\u52a0\u5f3a\u60a8\u7684\u6570\u5b57\u9886\u57df\u3002 [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u89e3\u7801 DNS \u6c61\u67d3\uff1a\u9690\u853d\u7684\u7834\u574f\u8005 DNS \u6c61\u67d3\uff0c\u4e00\u79cd\u6570\u5b57\u969c\u773c\u6cd5\uff0c\u53d1\u751f\u5728\u6076\u610f\u5b9e\u4f53\u7834\u574f DNS \u89e3\u6790\u5668\u7f13\u5b58\u65f6\uff0c\u5c06\u6beb\u65e0\u6212\u5fc3\u7684\u7528\u6237\u91cd\u5b9a\u5411\u5230\u6b3a\u8bc8\u76ee\u7684\u5730\u3002\u5bf9\u4e8e\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u6765\u8bf4\uff0c\u8fd9\u79cd\u65e0\u5f62\u7684\u5a01\u80c1\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u6cc4\u9732\u3001\u58f0\u8a89\u635f\u5bb3\u548c\u91cd\u5927\u8d22\u52a1\u635f\u5931\u3002\u4e86\u89e3 DNS \u6c61\u67d3\u7684\u673a\u5236\u662f\u6784\u5efa\u7262\u4e0d\u53ef\u7834\u7684\u9632\u5fa1\u7684\u7b2c\u4e00\u6b65\u3002 [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] DNS \u653b\u51fb\u7684\u5206\u7c7b\uff1a\u4e86\u89e3\u4f60\u7684\u654c\u4eba 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\u771f\u5b9e\u6848\u4f8b\u7814\u7a76\uff1a2018\u5e74\uff0c\u4e00\u4e2a\u4ee3\u53f7\u4e3a”DNSpionage”\u7684\u5927\u578b\u52ab\u6301\u6d3b\u52a8\u9488\u5bf9\u653f\u5e9c\u548c\u7535\u4fe1\u5b9e\u4f53\uff0c\u5c06\u7535\u5b50\u90ae\u4ef6\u548cVPN\u6d41\u91cf\u91cd\u5b9a\u5411\u5230\u653b\u51fb\u8005\u63a7\u5236\u7684\u670d\u52a1\u5668\u3002\u8fd9\u4e00\u4e8b\u4ef6\u7a81\u51fa\u4e86\u5728\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u5b9e\u65bd\u5f3a\u5927\u5b89\u5168\u63aa\u65bd\u7684\u5173\u952e\u9700\u6c42\u3002 [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u4e1a\u52a1\u5f71\u54cd\uff1a\u5f53 DNS \u5931\u63a7\u65f6 \u5bf9\u4e8e\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u6765\u8bf4\uff0c\u8fd9\u4e9b\u653b\u51fb\u4e0d\u4ec5\u4ec5\u662f\u6280\u672f\u6545\u969c\u2014\u2014\u5b83\u4eec\u662f\u6f5c\u5728\u7684\u4e1a\u52a1\u707e\u96be\u3002\u540e\u679c\u53ef\u80fd\u662f\u6df1\u8fdc\u7684\uff1a 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