{ "ok": true, "domain": "tju.edu.cn", "generated_at": "2026-08-10T12:16:08-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 88, "label": "Good", "categories": { "dns": 80, "mail": 90, "security": 96, "network": 55, "availability": 100 }, "category_weights": { "dns": 25, "mail": 20, "security": 25, "network": 10, "availability": 20 }, "items": [ { "category": "dns", "title": "IPv4 (A)", "max_points": 30, "earned_points": 30, "lost_points": 0, "detail": "1 IPv4 address(es) detected." }, { "category": "dns", "title": "IPv6 (AAAA)", "max_points": 10, "earned_points": 10, "lost_points": 0, "detail": "1 IPv6 address(es) detected." }, { "category": "dns", "title": "Name server redundancy", "max_points": 20, "earned_points": 20, "lost_points": 0, "detail": "2 NS record(s); 2 or more required." }, { "category": "dns", "title": "SOA record", "max_points": 10, "earned_points": 10, "lost_points": 0, "detail": "Authoritative zone record." }, { "category": "dns", "title": "DNSSEC chain", "max_points": 15, "earned_points": 0, "lost_points": 15, "detail": "Both DS and DNSKEY are required." }, { "category": "dns", "title": "CAA policy", "max_points": 5, "earned_points": 0, "lost_points": 5, "detail": "Certificate authority restriction." }, { "category": "dns", "title": "DNS propagation", "max_points": 10, "earned_points": 10, "lost_points": 0, "detail": "Agreement between public resolvers." }, { "category": "mail", "title": "MX records", "max_points": 20, "earned_points": 20, "lost_points": 0, "detail": "2 MX record(s)." }, { "category": "mail", "title": "SPF", "max_points": 25, "earned_points": 25, "lost_points": 0, "detail": "SPF policy published." }, { "category": "mail", "title": "DMARC", "max_points": 25, "earned_points": 25, "lost_points": 0, "detail": "DMARC policy published." }, { "category": "mail", "title": "DKIM", "max_points": 20, "earned_points": 20, "lost_points": 0, "detail": "A DKIM selector was verified." }, { "category": "mail", "title": "MTA-STS", "max_points": 5, "earned_points": 0, "lost_points": 5, "detail": "Mail transport policy." }, { "category": "mail", "title": "TLS-RPT", "max_points": 5, "earned_points": 0, "lost_points": 5, "detail": "TLS reporting policy." }, { "category": "security", "title": "Valid TLS certificate", "max_points": 55, "earned_points": 55, "lost_points": 0, "detail": "112 day(s) remaining." }, { "category": "security", "title": "Certificate lifetime", "max_points": 10, "earned_points": 10, "lost_points": 0, "detail": "Full points require at least 30 days remaining." }, { "category": "security", "title": "HTTP security headers", "max_points": 35, "earned_points": 31, "lost_points": 4, "detail": "8 of 9 evaluated headers detected." }, { "category": "network", "title": "PTR reverse DNS", "max_points": 30, "earned_points": 0, "lost_points": 30, "detail": "PTR not detected." }, { "category": "network", "title": "IPv4 diversity", "max_points": 35, "earned_points": 20, "lost_points": 15, "detail": "Two or more IPv4 addresses receive full points." }, { "category": "network", "title": "IPv6 connectivity", "max_points": 35, "earned_points": 35, "lost_points": 0, "detail": "AAAA availability." }, { "category": "availability", "title": "DNS resolution", "max_points": 40, "earned_points": 40, "lost_points": 0, "detail": "At least one address family must resolve." }, { "category": "availability", "title": "HTTP response", "max_points": 40, "earned_points": 40, "lost_points": 0, "detail": "HTTP/1.1 200 OK" }, { "category": "availability", "title": "HTTPS final URL", "max_points": 20, "earned_points": 20, "lost_points": 0, "detail": "Final URL uses HTTPS." } ], "methodology": "Each category is normalized to 100. The total is the weighted sum: DNS 25%, Email 20%, Security 25%, Network 10%, Availability 20%.", "diagnostics": [ { "level": "ok", "title": "IPv4 (A)", "detail": "1 IPv4 address(es) detected.", "category": "dns", "max_points": 30, "earned_points": 30, "lost_points": 0 }, { "level": "ok", "title": "IPv6 (AAAA)", "detail": "1 IPv6 address(es) detected.", "category": "dns", "max_points": 10, "earned_points": 10, "lost_points": 0 }, { "level": "ok", "title": "Name server redundancy", "detail": "2 NS record(s); 2 or more required.", "category": "dns", "max_points": 20, "earned_points": 20, "lost_points": 0 }, { "level": "ok", "title": "SOA record", "detail": "Authoritative zone record.", "category": "dns", "max_points": 10, "earned_points": 10, "lost_points": 0 }, { "level": "error", "title": "DNSSEC chain", "detail": "Both DS and DNSKEY are required.", "category": "dns", "max_points": 15, "earned_points": 0, "lost_points": 15 }, { "level": "error", "title": "CAA policy", "detail": "Certificate authority restriction.", "category": "dns", "max_points": 5, "earned_points": 0, "lost_points": 5 }, { "level": "ok", "title": "DNS propagation", "detail": "Agreement between public resolvers.", "category": "dns", "max_points": 10, "earned_points": 10, "lost_points": 0 }, { "level": "ok", "title": "MX records", "detail": "2 MX record(s).", "category": "mail", "max_points": 20, "earned_points": 20, "lost_points": 0 }, { "level": "ok", "title": "SPF", "detail": "SPF policy published.", "category": "mail", "max_points": 25, "earned_points": 25, "lost_points": 0 }, { "level": "ok", "title": "DMARC", "detail": "DMARC policy published.", "category": "mail", "max_points": 25, "earned_points": 25, "lost_points": 0 }, { "level": "ok", "title": "DKIM", "detail": "A DKIM selector was verified.", "category": "mail", "max_points": 20, "earned_points": 20, "lost_points": 0 }, { "level": "error", "title": "MTA-STS", "detail": "Mail transport policy.", "category": "mail", "max_points": 5, "earned_points": 0, "lost_points": 5 }, { "level": "error", "title": "TLS-RPT", "detail": "TLS reporting policy.", "category": "mail", "max_points": 5, "earned_points": 0, "lost_points": 5 }, { "level": "ok", "title": "Valid TLS certificate", "detail": "112 day(s) remaining.", "category": "security", "max_points": 55, "earned_points": 55, "lost_points": 0 }, { "level": "ok", "title": "Certificate lifetime", "detail": "Full points require at least 30 days remaining.", "category": "security", "max_points": 10, "earned_points": 10, "lost_points": 0 }, { "level": "warning", "title": "HTTP security headers", "detail": "8 of 9 evaluated headers detected.", "category": "security", "max_points": 35, "earned_points": 31, "lost_points": 4 }, { "level": "error", "title": "PTR reverse DNS", "detail": "PTR not detected.", "category": "network", "max_points": 30, "earned_points": 0, "lost_points": 30 }, { "level": "warning", "title": "IPv4 diversity", "detail": "Two or more IPv4 addresses receive full points.", "category": "network", "max_points": 35, "earned_points": 20, "lost_points": 15 }, { "level": "ok", "title": "IPv6 connectivity", "detail": "AAAA availability.", "category": "network", "max_points": 35, "earned_points": 35, "lost_points": 0 }, { "level": "ok", "title": "DNS resolution", "detail": "At least one address family must resolve.", "category": "availability", "max_points": 40, "earned_points": 40, "lost_points": 0 }, { "level": "ok", "title": "HTTP response", "detail": "HTTP/1.1 200 OK", "category": "availability", "max_points": 40, "earned_points": 40, "lost_points": 0 }, { "level": "ok", "title": "HTTPS final URL", "detail": "Final URL uses HTTPS.", "category": "availability", "max_points": 20, "earned_points": 20, "lost_points": 0 } ] }, "dns": { "records": { "A": [ "202.113.2.198" ], "AAAA": [ "2001:da8:a000:ab23::10" ], "CNAME": [], "MX": [ "10 hzmx02.mxmail.netease.com.", "5 hzmx01.mxmail.netease.com." ], "TXT": [ "\"v=spf1 include:spf.163.com -all\"", "\"ms=2ba0d37d829774073275a41eea148f818d58b4ff\"" ], "NS": [ "dns1.tju.edu.cn.", "dns2.tju.edu.cn." ], "SOA": [ "ns.tju.edu.cn. admin.tju.edu.cn. 2100419533 3600 300 86400 3600" ], "CAA": [], "DS": [], "DNSKEY": [ "257 3 7 AwEAAbAQwUEMpRtAfX/E8H96vIamHC+EylK9Z6sTmYK06NKuURAIz9/p ueyoQYQyu49GfULaGX6WkWxFb7z7XNMY3AGl6pMxCH7/PVV/Kr4e0Cj2 dp3w1sT55ygFVxFmigYgd3+EfqNzgwIl3cNwl4RrDG1XRCz5ytdCcip5 jjSidt8Y4f7dR2kDNt7hCC3OgWe3Bct+choi0IIu+du2nMsv3j1PRrtE 5gyDb8MynbeCiLDkmJFGCowJe1EjO7cv2CDJ/nWNmzsbFQzi60T33NRV MJfbegmxoKg9PMjvIOH7H+Aq0J2J3YVJpr9uykCzxLWemYKmHByQzdVO v/xGzs5JLxc=", "256 3 7 AwEAAbIk/xPDvjXvEv611OqdBamdMSI8QfRbOvJID3JqHC4AWGX5ZfG/ TItXyVUtUPZvn3Kg0zsc7udvgSXAL7kX7AMgeUzvtVLeAd5e5OmL6+F8 HBS5G3ZYiSm2MlQIK25d2KI9HaOckTpedeq/qmAz1gSgB/7JqFOtw94S te68N8s9" ], "RRSIG": [ "DNSKEY 7 3 3600 20260909135046 20260810134805 15467 tju.edu.cn. X+dAQc2ba98UQflQQzmLb+ROA84Ho7XN+F7xe+e0cbcfWaK0OngCA8gg uLWWFwUErGBzrnunFpezn0zG3v9wSmSdsFHz/C+81Hu7wuZbqc+WNemr gvR9xSwoSHPoSUcJYAas/nR5jzTzkErCEKUkMHuqiWo1PskdzWguZVkj XGk=", "DNSKEY 7 3 3600 20260909135046 20260810134805 31089 tju.edu.cn. X4szPZLyFa593Vcq4WjUnoYpSZHGKIg2GEK5eEPPywLrdczy5VO2QMdM uwpy11Rzktx3w6/pVwVkjH7sudCLLZLt86myG/b7jfKnJpUG2BbNyk3j VYPfbxPZRpo5r9G0SvHje8k4twjupTq5wyca6ZCj27UAjHA9k/abTAMz aVsQdEDUy5Od+or7/zqjNn/8w22ik0po7kO9r5as0J2QA5u64BZo+jKJ mBv+yLSl7K9cuaV0spOKRUURQX0ZQnpZI0X9brVLH6jJB9KFZ5lVHBZI nrtWMPN8ZQZI1E2gPXK1RkCor03TH52YeV4O4NTT4I1TiEDsDIAutlUB /AcRLg==", "MX 7 3 3600 20260905081139 20260806071643 15467 tju.edu.cn. c+e7Fn53qgvinE3IYCMKFRsfKw7SfN6XI6n5P3zegtGei/4jO/DGKni8 vBmTk8PIBE0ec8MlZfoXI5LrHYeDBvVs7TRjyzevB0u26cjV4g+o5NZJ oIXXlhH8vwiCqN81ar4GFPMh9EsgR2CUZV6TGdbwNEOX4GdEIgK9xYpB cYQ=" ], "NSEC": [], "NSEC3": [], "SRV": [], "NAPTR": [], "TLSA": [], "SSHFP": [] }, "ipv4": [ "202.113.2.198" ], "ipv6": [ "2001:da8:a000:ab23::10" ] }, "mail": { "spf": "v=spf1 include:spf.163.com -all", "dmarc": "v=dmarc1;p=quarantine;fo=1;ruf=mailto:dmarc@qiye.163.com;rua=mailto:dmarc_report@qiye.163.com", "dkim_selector": "default", "dkim_host": "default._domainkey.tju.edu.cn", "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDN77AZtmBn+5tfXsfYVFWA7jtzU2qbxjMjblQBoGuJuE4cUzMNa4XsObzux2DkI5nHl9wnwzOzM7tWvPv632WB0T3+G/OSfjfdDqHqoDZMYN4d29MPdMpSEmuwILrlYWCyb7qqil0w8G0UGvZDCA/Lf0AI2H7WFdBYglSPAak4IwIDAQAB", "spf_analysis": { "valid": true, "lookups": 1, "final": "-all", "message": "Within the estimated limit" }, "dmarc_analysis": { "valid": true, "policy": "quarantine" }, "bimi": "", "mta_sts": "", "tls_rpt": "" }, "advanced": { "ptr": "", "propagation": { "consistent": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "202.113.2.198" ], "time_ms": 44.56 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "202.113.2.198" ], "time_ms": 254.86 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "202.113.2.198" ], "time_ms": 750.46 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "202.113.2.198" ], "time_ms": 862.77 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "202.113.2.198" ], "time_ms": 518.4 } ] } }, "ssl": { "available": true, "issuer": "TrustAsia Technologies, Inc.", "subject": "*.tju.edu.cn", "valid_from": "2025-11-09T18:00:00-06:00", "valid_to": "2026-11-30T17:59:59-06:00", "days_remaining": 112, "san": [ "*.tju.edu.cn", "tju.edu.cn" ], "protocol": "TLSv1.2", "cipher": "ECDHE-RSA-AES256-GCM-SHA384" }, "http": { "url": "https://tju.edu.cn/", "status": "HTTP/1.1 200 OK", "http_version": "2", "headers": { "date": "Mon, 10 Aug 2026 17:16:04 GMT", "server": "***********", "x-frame-options": "SAMEORIGIN", "x-xss-protection": "1; mode=block", "x-content-type-options": "nosniff", "permissions-policy": "geolocation=(self), microphone=()", "referrer-policy": "no-referrer-when-downgrade", "x-download-options": "noopen", "x-permitted-cross-domain-policies": "master-only", "content-security-policy": "default-src 'self' data: blob: https://res.wx.qq.com *.bdimg.com *.map.baidu.com *.gstatic.com *.googleapis.com *.amap.com *.conac.cn *.jiathis.com article.tju.edu.cn:9009 *.tju.edu.cn *.baidu.com *.googleapis.com *.weibo.com *.bshare.cn *.qq.com *.kaipuyun.cn 'unsafe-inline' 'unsafe-eval'; frame-ancestors 'self';", "strict-transport-security": "max-age=31536000; includeSubdomains; preload", "cross-origin-resource-policy": "unsafe-none", "cross-origin-opener-policy": "unsafe-none", "last-modified": "Mon, 10 Aug 2026 05:49:19 GMT", "accept-ranges": "bytes", "content-length": "202270", "cache-control": "max-age=600", "expires": "Mon, 10 Aug 2026 17:26:04 GMT", "vary": "Accept-Encoding", "etag": "\"3161e-658aaea57171b-gzip\"", "content-type": "text/html", "content-language": "zh-CN" }, "security_checks": { "strict-transport-security": true, "content-security-policy": true, "x-content-type-options": true, "x-frame-options": true, "referrer-policy": true, "permissions-policy": true, "cross-origin-opener-policy": true, "cross-origin-embedder-policy": false, "cross-origin-resource-policy": true }, "server": "***********", "powered_by": "" }, "webpage": { "url": "https://tju.edu.cn/", "title": "天津大学", "description": "", "success": true, "error": "", "status": 206 }, "network": { "202.113.2.198": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "hzmx02.mxmail.netease.com", "ports": [ { "port": 25, "open": false, "time_ms": 1.2, "banner": "", "error": "Connection refused" }, { "port": 465, "open": false, "time_ms": 27, "banner": "", "error": "No connection" }, { "port": 587, "open": false, "time_ms": 27.5, "banner": "220 entmail-hzmx2-aliyun.singapore.163.org ESMTP ready", "error": "No connection" } ] }, "visitor": { "ip": "216.73.217.62", "reverse": "", "country": "", "country_code": "", "region": "", "city": "", "latitude": null, "longitude": null, "isp": "", "organization": "", "asn": "", "timezone": "", "browser": "Other", "os": "Other", "language": "", "user_agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)", "is_bot": true, "cloudflare": false }, "analysis_time_ms": 92.78 }