{ "ok": true, "domain": "nottingham.ac.uk", "generated_at": "2026-08-09T00:06:51-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 76, "label": "Good", "categories": { "dns": 70, "mail": 95, "security": 69, "network": 20, "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": 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": "4 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": 5, "lost_points": 0, "detail": "TLS reporting policy." }, { "category": "security", "title": "Valid TLS certificate", "max_points": 55, "earned_points": 55, "lost_points": 0, "detail": "146 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": 4, "lost_points": 31, "detail": "1 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": 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/2 200 " }, { "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": "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": "4 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": "ok", "title": "TLS-RPT", "detail": "TLS reporting policy.", "category": "mail", "max_points": 5, "earned_points": 5, "lost_points": 0 }, { "level": "ok", "title": "Valid TLS certificate", "detail": "146 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": "1 of 9 evaluated headers detected.", "category": "security", "max_points": 35, "earned_points": 4, "lost_points": 31 }, { "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": "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/2 200 ", "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": [ "185.18.139.133" ], "AAAA": [], "CNAME": [], "MX": [ "10 nottingham-ac-uk.mail.protection.outlook.com." ], "TXT": [ "\"smartsheet-site-validation=UsjFeY2ICM88UrzI9ciqacTLcpeAJRkR\"", "\"anthropic-domain-verification-p4z2z4=x2uFL7ZXVblci85yjXadTfaR2\"", "\"autodesk-domain-verification=g0SIuS26PsuQa3963y9B\"", "\"adobe-idp-site-verification=7f2ebc573bc1769a828f63ec966bd01a1cd05ccf9cc64fb55d97874f5a23589e\"", "\"jamf-site-verification=qEzRIpanfBewOTlcO6f1bA\"", "\"google-site-verification=sa8GOryPIpBt5npSI7xAqPehUyiGET3xk-LEZ1GbOig\"", "\"25E3Z31XTF6U404A703LSJS4SGE9OCQU1D4OAYZH6\"", "\"brevo-code:b1414e0a234265a2faa294058248ae06\"", "\"CD7F2D11-A9B7-4E5E-BF97-117FD5A2B475\"", "\"1Q6+0cep9R4exJx3RGfB8ObBpeO/kDtYsZYD8jmj1cupaJIDz8KUExk/Qsl2dqgt95g0lyRDLCa6102bJk+lFA==\"", "\"MS=ms57537667\"", "\"google-site-verification=L5AVOihugr8sVP2OrvjUPTQBk8cBP9w_FPp82WCtl_E\"", "\"QuoVadis=cd924184-d16f-4388-a06f-60841f6bfc43\"", "\"access-domain-verification=5c30dffba43dd9ca58fedebac54fb7913da919b1a1de9d7ab834311f7d5b1abf\"", "\"v=spf1 exists:%{i}._spf.nottingham.ac.uk include:_spf.nottinghamacuk.vueliopm.com include:mail-eu.geckoform.com ip4:128.243.220.65 ip4:128.243.237.2 ip4:128.243.44.55\" \" include:amazonses.com include:spf.zoho.eu include:_spf0000000.nottingham.ac.uk include:spf.protection.outlook.com ~all\"", "\"atlassian-domain-verification=3JE9cke8XsM59Oh0tT73QNEhs6Gw2bfMaxiyc9quAuZdW4al9BGIrCVs9s4rfgQy\"", "\"SERIALUP\"", "\"MS=ms55552287\"", "\"apple-domain-verification=xbJn3kEmmhW9Ou4k\"", "\"ddosx-site-verification=1d20e59f864521a97440915cea9da380eb5a6f183a9d98ad6bc2078c5575be8a\"", "\"taegis-domain-verification=a38968c7875c6fa3ab0176302a193949922e1ac9fe1b748289cebff722874688\"", "\"adobe-idp-site-verification=def3d1d831162020848a32206541217c00bc2dfbc6199ce745dbbca7033628ef\"", "\"202503061523064202abtmsdafw16qhs6h09zgmyk0aejrl45afb38dgzeh5qse9\"" ], "NS": [ "uidapdns02.nottingham.ac.uk.", "uidapdns01.nottingham.ac.uk.", "extdns2.warwick.ac.uk.", "extdns1.warwick.ac.uk." ], "SOA": [ "uidapdns01.nottingham.ac.uk. dnsadmin.nottingham.ac.uk. 2021281532 10800 3600 2419200 900" ], "CAA": [], "DS": [], "DNSKEY": [], "RRSIG": [], "NSEC": [], "NSEC3": [], "SRV": [], "NAPTR": [ "100 10 \"s\" \"x-eduroam:radius.tls\" \"\" _radsec._tcp.roaming.ja.net." ], "TLSA": [], "SSHFP": [] }, "ipv4": [ "185.18.139.133" ], "ipv6": [] }, "mail": { "spf": "v=spf1 exists:%{i}._spf.nottingham.ac.uk include:_spf.nottinghamacuk.vueliopm.com include:mail-eu.geckoform.com ip4:128.243.220.65 ip4:128.243.237.2 ip4:128.243.44.55 include:amazonses.com include:spf.zoho.eu include:_spf0000000.nottingham.ac.uk include:spf.protection.outlook.com ~all", "dmarc": "v=DMARC1;p=quarantine;pct=100;rua=mailto:b22ec18c7f@rua.easydmarc.eu;ruf=mailto:b22ec18c7f@ruf.easydmarc.eu;ri=86400;fo=1;", "dkim_selector": "selector1", "dkim_host": "selector1._domainkey.nottingham.ac.uk", "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDMZ0eLTPwBVaoNZ7pmnmhp4vFKty7+mpCfiNfkhMUMp2uglLKbXgYukFjDGXP49hY3NsuCOYwt7Wwdn7FsKodasYTYNYviSoQJP+r5UHCDi04oqCdcQx9haxAAagLE2QSUt3wGo3q5UFWDODdiHyjBDFs9wlZBeGxfp5HWGg++ZQIDAQAB; n=1024,1451169744,1466980944", "spf_analysis": { "valid": true, "lookups": 7, "final": "~all", "message": "Within the estimated limit" }, "dmarc_analysis": { "valid": true, "policy": "quarantine" }, "bimi": "", "mta_sts": "", "tls_rpt": "v=TLSRPTv1;rua=mailto:tls-rua@mailcheck.service.ncsc.gov.uk" }, "advanced": { "ptr": "", "propagation": { "consistent": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "185.18.139.133" ], "time_ms": 165.2 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "185.18.139.133" ], "time_ms": 148.06 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "185.18.139.133" ], "time_ms": 272.59 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "185.18.139.133" ], "time_ms": 236.17 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "185.18.139.133" ], "time_ms": 289.88 } ] } }, "ssl": { "available": true, "issuer": "Sectigo Limited", "subject": "www.nottingham.ac.uk", "valid_from": "2025-12-15T18:00:00-06:00", "valid_to": "2027-01-02T17:59:59-06:00", "days_remaining": 146, "san": [ "www.nottingham.ac.uk", "nottingham.ac.uk" ], "protocol": "TLSv1.3", "cipher": "TLS_AES_128_GCM_SHA256" }, "http": { "url": "https://www.nottingham.ac.uk/", "status": "HTTP/2 200 ", "http_version": "3", "headers": { "content-length": "195829", "location": "https://www.nottingham.ac.uk/", "cache-control": "no-cache, no-store", "x-geoip-country-code": "US", "x-origin-server": "z-uon-WEB2", "content-type": "text/html; charset=utf-8", "x-contensis-viewer-groups": "0", "x-node": "9583233", "x-depends": "9575479", "surrogate-control": "max-age=3600", "access-control-allow-origin": "*", "access-control-allow-methods": "GET, OPTIONS", "access-control-allow-headers": "*", "x-xss-protection": "1; mode=block", "x-frame-options": "sameorigin", "date": "Sun, 09 Aug 2026 04:59:12 GMT", "x-host": "live-uon.cloud.contensis.com", "x-grace": "72h", "x-backend-ttl": "3600.000", "vary": "Accept-Encoding", "x-varnish": "697947044 697971292", "x-varnish-authentication": "skip", "x-age": "448", "pragma": "no-cache", "x-cache-aspx": "true", "expires": "-1", "accept-ranges": "bytes", "x-server-name": "z-uon-CACHE1" }, "security_checks": { "strict-transport-security": false, "content-security-policy": false, "x-content-type-options": false, "x-frame-options": true, "referrer-policy": false, "permissions-policy": false, "cross-origin-opener-policy": false, "cross-origin-embedder-policy": false, "cross-origin-resource-policy": false }, "server": "", "powered_by": "" }, "webpage": { "url": "https://www.nottingham.ac.uk/", "title": "University of Nottingham", "description": "The University of Nottingham is a pioneering institution. We’re a top 20 UK university and 7th in the UK for research power. We’re working to change the world.", "success": true, "error": "", "status": 206 }, "network": { "185.18.139.133": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "nottingham-ac-uk.mail.protection.outlook.com", "ports": [ { "port": 25, "open": false, "time_ms": 37, "banner": "", "error": "Network is unreachable" }, { "port": 465, "open": false, "time_ms": 4044.2, "banner": "", "error": "Connection timed out" }, { "port": 587, "open": false, "time_ms": 4020.8, "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": 97.47 }