{ "ok": true, "domain": "polyu.edu.hk", "generated_at": "2026-08-09T11:09:46-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 85, "label": "Good", "categories": { "dns": 70, "mail": 90, "security": 88, "network": 65, "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": "2 IPv4 address(es) detected." }, { "category": "dns", "title": "IPv6 (AAAA)", "max_points": 10, "earned_points": 0, "lost_points": 10, "detail": "0 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": "1 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": "144 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": 23, "lost_points": 12, "detail": "6 of 9 evaluated headers detected." }, { "category": "network", "title": "PTR reverse DNS", "max_points": 30, "earned_points": 30, "lost_points": 0, "detail": "PTR: www.polyu.edu.hk" }, { "category": "network", "title": "IPv4 diversity", "max_points": 35, "earned_points": 35, "lost_points": 0, "detail": "Two or more IPv4 addresses receive full points." }, { "category": "network", "title": "IPv6 connectivity", "max_points": 35, "earned_points": 0, "lost_points": 35, "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": "2 IPv4 address(es) detected.", "category": "dns", "max_points": 30, "earned_points": 30, "lost_points": 0 }, { "level": "error", "title": "IPv6 (AAAA)", "detail": "0 IPv6 address(es) detected.", "category": "dns", "max_points": 10, "earned_points": 0, "lost_points": 10 }, { "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": "1 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": "144 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": "6 of 9 evaluated headers detected.", "category": "security", "max_points": 35, "earned_points": 23, "lost_points": 12 }, { "level": "ok", "title": "PTR reverse DNS", "detail": "PTR: www.polyu.edu.hk", "category": "network", "max_points": 30, "earned_points": 30, "lost_points": 0 }, { "level": "ok", "title": "IPv4 diversity", "detail": "Two or more IPv4 addresses receive full points.", "category": "network", "max_points": 35, "earned_points": 35, "lost_points": 0 }, { "level": "error", "title": "IPv6 connectivity", "detail": "AAAA availability.", "category": "network", "max_points": 35, "earned_points": 0, "lost_points": 35 }, { "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": [ "158.132.48.76", "158.132.82.94" ], "AAAA": [], "CNAME": [], "MX": [ "10 polyu-edu-hk.mail.protection.outlook.com." ], "TXT": [ "\"google-site-verification=S4gP1ky07rXzDuJ2NTcqloJeWYRJRCM5FbDe7xFKfvc\"", "\"google-gws-recovery-domain-verification=50227349\"", "\"google-gws-recovery-domain-verification=50205257\"", "\"atlassian-sending-domain-verification=9ae71124-b75f-4ccb-8a12-e4173d5aa536\"", "\"v=spf1 include:spf.protection.outlook.com include:spf1.polyu.edu.hk include:spf2.polyu.edu.hk include:spf3.polyu.edu.hk a mx ~all\"", "\"apple-domain-verification=xpc2BddvaHurWavB\"", "\"atlassian-domain-verification=6EL49gWopADihaAxSUwyDC9w0zd2YuUy397S38FqLHloMMRfZtiZ4ipWllHEBwdd\"", "\"sophos-domain-verification=70802d6bba1ca9eae7fccef88be880c57192fa5ce4fba27e389b6f38e697fa32\"", "\"facebook-domain-verification=ssvm0ez4syfkajb6n76mf88r98bisi\"", "\"atlassian-sending-domain-verification=517083e2-98df-498a-ab71-4e141214478d\"", "\"atlassian-sending-domain-verification=8d317368-625f-40ec-9cdb-19ec9de7f1fe\"", "\"google-site-verification=ui1Q4jvNqdzqbqW17F3TkfazxyqAhvHgVeHz-4EZ-E4\"", "\"atlassian-sending-domain-verification=c7f75273-a26d-49da-a247-3b095a3d8c6d\"", "\"atlassian-sending-domain-verification=792bcc73-cc09-4587-89ca-964c00061174\"" ], "NS": [ "ns3.polyu.edu.hk.", "ns4.polyu.edu.hk." ], "SOA": [ "ns4.polyu.edu.hk. dnsadm.polyu.edu.hk. 2026080701 3600 3600 604800 3600" ], "CAA": [], "DS": [], "DNSKEY": [], "RRSIG": [], "NSEC": [], "NSEC3": [], "SRV": [], "NAPTR": [], "TLSA": [], "SSHFP": [] }, "ipv4": [ "158.132.48.76", "158.132.82.94" ], "ipv6": [] }, "mail": { "spf": "v=spf1 include:spf.protection.outlook.com include:spf1.polyu.edu.hk include:spf2.polyu.edu.hk include:spf3.polyu.edu.hk a mx ~all", "dmarc": "v=DMARC1; p=none; pct=100; sp=none; adkim=r; aspf=r; rua=mailto:dmarc_rua@polyu.edu.hk", "dkim_selector": "selector1", "dkim_host": "selector1._domainkey.polyu.edu.hk", "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDcN+yPgaFitFc9EvQi7SBWfIoHw8KYHeZeQihAFYxGdACh8aqw5fPVm3MX5/Y7t3A2IgP9NtxZQyYN0inDW2IxZIWvK3NOBisuyK2PA3EyG7AIC902FAwo6bDHxpvLulF7JWXfmuV4nkqopAv6Dwlyb50ye9unctY2EsNfrNVqrQIDAQAB;", "spf_analysis": { "valid": true, "lookups": 6, "final": "~all", "message": "Within the estimated limit" }, "dmarc_analysis": { "valid": true, "policy": "none" }, "bimi": "", "mta_sts": "", "tls_rpt": "" }, "advanced": { "ptr": "www.polyu.edu.hk", "propagation": { "consistent": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "158.132.48.76", "158.132.82.94" ], "time_ms": 34.78 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "158.132.48.76", "158.132.82.94" ], "time_ms": 493.97 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "158.132.48.76", "158.132.82.94" ], "time_ms": 267.96 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "158.132.48.76", "158.132.82.94" ], "time_ms": 229.48 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "158.132.48.76", "158.132.82.94" ], "time_ms": 248.92 } ] } }, "ssl": { "available": true, "issuer": "DigiCert Inc", "subject": "*.polyu.edu.hk", "valid_from": "2026-06-15T19:00:00-05:00", "valid_to": "2026-12-31T17:59:59-06:00", "days_remaining": 144, "san": [ "*.polyu.edu.hk", "www.polyu.edu.hk", "polyu.edu.hk" ], "protocol": "TLSv1.3", "cipher": "TLS_AES_128_GCM_SHA256" }, "http": { "url": "https://www.polyu.edu.hk/", "status": "HTTP/1.1 200 OK", "http_version": "2", "headers": { "location": "https://www.polyu.edu.hk/", "server": "nginx", "date": "Sun, 09 Aug 2026 16:09:35 GMT", "content-type": "text/html; charset=utf-8", "content-length": "501218", "connection": "keep-alive", "x-xss-protection": "1; mode=block", "set-cookie": "LB_cookie=!3oCxCLx+pjKZo8GuIoJR5RjtQyZubFaUophcoF4GoENlqvK45gLf8kaTQTryPDRzmEXSzqbU0wtzTWLkAHjoG0ZvmbKN4ApZyN8mjDldRxUf6g==; path=/; Httponly; Secure", "cache-control": "no-cache, no-store", "pragma": "no-cache", "expires": "-1", "accept-ch": "Sec-CH-UA-Full-Version-List,Sec-CH-UA-Platform-Version,Sec-CH-UA-Arch,Sec-CH-UA-Model,Sec-CH-UA-Bitness", "x-frame-options": "SAMEORIGIN", "x-content-type-options": "nosniff", "referrer-policy": "strict-origin-when-cross-origin", "permissions-policy": "accelerometer=(), camera=(self), fullscreen=(self), geolocation=(self), gyroscope=(), magnetometer=(), microphone=(self), payment=(), storage-access=(), sync-xhr=(self), usb=()", "access-control-allow-origin": "*", "content-security-policy": "default-src 'none'; img-src 'self' data: https://*.polyu.edu.hk https://*.google-analytics.com https://*.googletagmanager.com https://i.ytimg.com https://*.google.com https://*.google.com.hk https://px.ads.linkedin.com https://www.facebook.com https://www.linkedin.com https://*.google.com https://*.gstatic.com; script-src 'self' 'unsafe-inline' 'unsafe-eval'; script-src-elem 'self' 'unsafe-inline' https://*.polyu.edu.hk https://*.googletagmanager.com https://*.g.doubleclick.net https://*.google-analytics.com https://*.doubleclick.net https://snap.licdn.com https://connect.facebook.net https://*.google.com https://*.gstatic.com; connect-src 'self' https://*.polyu.edu.hk https://*.google-analytics.com https://*.analytics.google.com https://*.googletagmanager.com https://*.google.com https://*.g.doubleclick.net https://px.ads.linkedin.com; frame-src 'self' https://*.polyu.edu.hk https://www.youtube.com https://polyu.ap.panopto.com https://td.doubleclick.net https://*.googletagmanager.com https://*.s3.ap-east-1.amazonaws.com https://www.facebook.com https://calendar.google.com https://unibuddy.co https://app.powerbi.com https://*.google.com https://*.google.com.hk https://open.spotify.com https://forms.office.com https://forms.microsoft.com https://forms.cloud.microsoft https://e.issuu.com https://virtualtourhostshowcase.com https://player.vimeo.com https://heyzine.com https://outlook.office365.com; frame-ancestors 'self'; style-src 'self' 'unsafe-inline' https://*.google.com https://*.gstatic.com; style-src-elem 'self' 'unsafe-inline' https://*.polyu.edu.hk https://fonts.googleapis.com https://*.google.com https://*.gstatic.com; base-uri 'self'; form-action 'self'; font-src 'self' data: https://fonts.gstatic.com; media-src 'self' blob:; upgrade-insecure-requests;", "strict-transport-security": "max-age=31536000; includeSubDomains; preload" }, "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": false, "cross-origin-embedder-policy": false, "cross-origin-resource-policy": false }, "server": "nginx", "powered_by": "" }, "webpage": { "url": "https://www.polyu.edu.hk/", "title": "Top Innovative World-Class University in Hong Kong | PolyU", "description": "Explore one of the top universities in Hong Kong. As an innovative world-class university and the best university in Asia, we offer premier international education.", "success": true, "error": "", "status": 200 }, "network": { "158.132.48.76": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" }, "158.132.82.94": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "polyu-edu-hk.mail.protection.outlook.com", "ports": [ { "port": 25, "open": false, "time_ms": 19.8, "banner": "", "error": "Network is unreachable" }, { "port": 465, "open": false, "time_ms": 4054.1, "banner": "", "error": "Connection timed out" }, { "port": 587, "open": false, "time_ms": 4020.1, "banner": "", "error": "Connection timed out" } ] }, "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": 129.91 }