{ "ok": true, "domain": "liverpool.ac.uk", "generated_at": "2026-08-09T05:57:47-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 80, "label": "Good", "categories": { "dns": 70, "mail": 100, "security": 69, "network": 50, "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": "5 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": 5, "lost_points": 0, "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": "54 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": 30, "lost_points": 0, "detail": "PTR: vs-www.liv.ac.uk" }, { "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/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": "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": "5 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": "ok", "title": "MTA-STS", "detail": "Mail transport policy.", "category": "mail", "max_points": 5, "earned_points": 5, "lost_points": 0 }, { "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": "54 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": "ok", "title": "PTR reverse DNS", "detail": "PTR: vs-www.liv.ac.uk", "category": "network", "max_points": 30, "earned_points": 30, "lost_points": 0 }, { "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/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": [ "138.253.13.50" ], "AAAA": [], "CNAME": [], "MX": [ "10 iron5.liv.ac.uk.", "30 iron3.liv.ac.uk.", "10 iron4.liv.ac.uk.", "10 iron6.liv.ac.uk.", "30 iron2.liv.ac.uk." ], "TXT": [ "\"05f57b2b-279f-4a50-b6b2-f59186a4ee26\"", "\"sB+oEyXaAUqITlhCt1hqSO8FsGa3qJERh5TtCXpocc15iMuRQbwmAo+Z8kYxB6ZeWIXbJZTQ440O5hC6OgmOBA==\"", "\"as=1687771568\"", "\"dW5pdmVyc2l0eQ==\"", "\"apple-domain-verification=vO3SwxLI4so8y0oM\"", "\"autodesk-domain-verification=NFtIpGze_05R5Md62-21\"", "\"_6pu02zcyokm111b3wur3d1sgp7x8rto\"", "\"l60pnwck1s88ys8t4t7trh43mf3thsn1\"", "\"zapier-domain-verification-challenge=518e7bf0-bba5-46a7-8475-60af92fa3aa6\"", "\"adobe-idp-site-verification=0b1f2135af595191ba6f600786dceedb7cd78d12634c5577546351d7f4f0f43d\"", "\"hpg2hz7y6t5gkm3xkjbxyl2m0s3bd40r\"", "\"google-site-verification=EMQEoH0mCHJuZXlG4kOOUkk93kbcHmrSSl3H7Ri3MC0\"", "\"QuoVadis=d74e8ca2-38e2-49ba-8fa0-26162bb5cf21\"", "\"canva-site-verification=KIwsnbzekq-cZEOMXHjWkA\"", "\"atlassian-domain-verification=adWygssJiawycdrPvhYBDPNhyM28PO402m5kOkiyeQfUWTGdGzzaaPLLGosse7Nf\"", "\"MS=ms21112035\"", "\"QuoVadis=d3423132-9c01-4f2a-90f5-d5c2af48cb41\"", "\"yahoo-verification-key=/cLD4pc2n5hZPHZxd2lPtl9F07g30wkfWVcKe9EAofg=\"", "\"CMAURSXORA1ZAT9EQ3JG67SH9Q4SY7KPCG5F76O8S\"", "\"B417340BF6C57AAFE6F0A2E70912B65E0A0E3D23\"", "\"00D8d000009rhgD=1TBSr00000006lN\"", "\"have-i-been-pwned-verification=198f2c61026af8d468b2a4a2fee83fb3\"", "\"liverpool.ac.uk\" \"::\" \"adobe-sign-verification=ed4b255819ca68ecbccec24f69f3c2b3\"", "\"ZOOM_verify_0HNos0PzQwSTb__V9qamCw\"", "\"v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:mailgun.org ~all\"", "\"d3a647f0-9caf-4e2c-b739-19cb2402e50d.100718\"" ], "NS": [ "ns4.ja.net.", "dns1.liv.ac.uk.", "ns0.york.ac.uk.", "dns0.liv.ac.uk." ], "SOA": [ "dns0.liv.ac.uk. network.liv.ac.uk. 2011029385 28800 7200 1209600 86400" ], "CAA": [], "DS": [], "DNSKEY": [], "RRSIG": [], "NSEC": [], "NSEC3": [], "SRV": [], "NAPTR": [ "100 10 \"S\" \"x-eduroam:radius.tls\" \"\" _radsec._tcp.roaming.ja.net." ], "TLSA": [], "SSHFP": [] }, "ipv4": [ "138.253.13.50" ], "ipv6": [] }, "mail": { "spf": "v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:mailgun.org ~all", "dmarc": "v=DMARC1;p=quarantine;fo=1;ri=3600;rua=mailto:dmarc_agg@vali.email;", "dkim_selector": "selector1", "dkim_host": "selector1._domainkey.liverpool.ac.uk", "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC7hqtmgkdv0Dx2xe4F4042jbTnqoccxk3wb8Cmff6XLdg512Jqz81YxOcGCUm7EI3Ggl8Or01Q/NTjs6He+7Ng5G1ye/+EMPPyHFe1Z84UIHCHBXV/ttdP2F6xGL26mV97uw8HNLo4ieTz7e4ogfaTAnzlpU8xz8pp1A2DMqC4ZwIDAQAB; n=1024,1449697266,1465508466", "spf_analysis": { "valid": true, "lookups": 2, "final": "~all", "message": "Within the estimated limit" }, "dmarc_analysis": { "valid": true, "policy": "quarantine" }, "bimi": "", "mta_sts": "v=STSv1; id=20260520163126Z;", "tls_rpt": "v=TLSRPTv1;rua=mailto:tls-report@vali.email" }, "advanced": { "ptr": "vs-www.liv.ac.uk", "propagation": { "consistent": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "138.253.13.50" ], "time_ms": 259.99 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "138.253.13.50" ], "time_ms": 139.31 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "138.253.13.50" ], "time_ms": 162.13 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "138.253.13.50" ], "time_ms": 366.77 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "138.253.13.50" ], "time_ms": 287.54 } ] } }, "ssl": { "available": true, "issuer": "Sectigo Limited", "subject": "www.liverpool.ac.uk", "valid_from": "2025-10-01T19:00:00-05:00", "valid_to": "2026-10-02T18:59:59-05:00", "days_remaining": 54, "san": [ "www.liverpool.ac.uk", "liv.ac.uk", "liverpool.ac.uk", "www.liv.ac.uk" ], "protocol": "TLSv1.3", "cipher": "TLS_AES_256_GCM_SHA384" }, "http": { "url": "https://www.liverpool.ac.uk/", "status": "HTTP/1.1 200 OK", "http_version": "2", "headers": { "location": "https://www.liverpool.ac.uk/", "connection": "close", "cache-control": "max-age=0, must-revalidate, private", "pragma": "no-cache", "content-type": "text/html; charset=UTF-8", "server": "UoL Web Server", "date": "Sun, 09 Aug 2026 10:57:38 GMT", "strict-transport-security": "max-age=31536000", "set-cookie": "citrix_ns_id=AAQ7Il14ajtCq4UAAAAAADvZhfYpa8N13yjGO-Lo4tzdHH7Q81cEiQyMmdoXgjuzOw==pmB4ag==HEV-MY6wAl7mkUZ49KstILO3_rE=; Domain=.liverpool.ac.uk; Path=/; HttpOnly", "x-cache-control-orig": "", "x-expires-orig": "None", "transfer-encoding": "chunked" }, "security_checks": { "strict-transport-security": true, "content-security-policy": false, "x-content-type-options": false, "x-frame-options": false, "referrer-policy": false, "permissions-policy": false, "cross-origin-opener-policy": false, "cross-origin-embedder-policy": false, "cross-origin-resource-policy": false }, "server": "UoL Web Server", "powered_by": "" }, "webpage": { "url": "https://www.liverpool.ac.uk/", "title": "University of Liverpool", "description": "For advancement of learning and ennoblement of life. Find your future at the University of Liverpool - the original redbrick. Find a course and apply today.", "success": true, "error": "", "status": 200 }, "network": { "138.253.13.50": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "iron5.liv.ac.uk", "ports": [ { "port": 25, "open": false, "time_ms": 1.1, "banner": "", "error": "Connection refused" }, { "port": 465, "open": false, "time_ms": 4020.7, "banner": "", "error": "Connection timed out" }, { "port": 587, "open": false, "time_ms": 4113.7, "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": 73.68 }