{
    "ok": true,
    "domain": "cam.ac.uk",
    "generated_at": "2026-08-08T18:09:24-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 91,
        "label": "Excellent",
        "categories": {
            "dns": 95,
            "mail": 95,
            "security": 88,
            "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": "2 IPv6 address(es) detected."
            },
            {
                "category": "dns",
                "title": "Name server redundancy",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "9 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": 15,
                "lost_points": 0,
                "detail": "DS and DNSKEY detected."
            },
            {
                "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": "77 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": 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/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": "ok",
                "title": "IPv6 (AAAA)",
                "detail": "2 IPv6 address(es) detected.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "Name server redundancy",
                "detail": "9 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": "ok",
                "title": "DNSSEC chain",
                "detail": "DS and DNSKEY detected.",
                "category": "dns",
                "max_points": 15,
                "earned_points": 15,
                "lost_points": 0
            },
            {
                "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": "77 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": "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/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": [
                "23.185.0.2"
            ],
            "AAAA": [
                "2620:12a:8000::2",
                "2620:12a:8001::2"
            ],
            "CNAME": [],
            "MX": [
                "0 cam-ac-uk.mail.protection.outlook.com."
            ],
            "TXT": [
                "\"9026cbf1-7b8b-4613-87ce-a46bda32c08f\"",
                "\"v=spf1 include:_spf.cam.ac.uk include:spf.protection.outlook.com include:_spf.google.com include:spf.uk.odmad.quest-on-demand.com -all\"",
                "\"atlassian-domain-verification=S5SLTUt0OLAN9mxNzSRE7Cwjz4YOzlAVb87kMqkz6FcVeqp9q2PX8wtErVchDQYH\"",
                "\"google-site-verification=DzWWuhcpZ1B2FT5ftPCIV8rK6hbuLEEaojFzIt_YhSM\"",
                "\"hpe-greenlake-domain-verification=78487863375a505250746c662d4236615a71794f322d47423172636354537362\"",
                "\"access-domain-verification=80b9280e5d8d74cd9a01a3af64bba66df221437d7612cc895110546f3b86d2ce\"",
                "\"QuoVadis=a2edaff3-bdc6-44c5-8550-2167fe7338c4\"",
                "\"google-site-verification=vob_qUOVAbGehTQ74k1vnA1XCWJB2CSWwsP9fNdwALU\"",
                "\"_l57xfo8xodfo7j6g0fb9zoljfwh18qt\"",
                "\"jamf-site-verification=9Xc0IY8F9-nFQz_ItUdvSg\"",
                "\"miro-verification=a1052e0584a21e3d2792bce42f69dc21def357fc\"",
                "\"google-site-verification=WBy6QZ92OsuLOOPs8Zrr4GxorRnSu9H_aiLmyCjX-nI\"",
                "\"_um3kem45o33chvq68mb4qyt72y57oow\"",
                "\"have-i-been-pwned-verification=505eab056dca3ebf0a94cc28eeef0c31\"",
                "\"airtable-verification=a44072da1d55edc25c09b3eb72f8cedd\"",
                "\"dell-technologies-domain-verification=cam.ac.uk_b220a1b2-fe6b-4199-bae5-c07814bfc1e0_1768470629\""
            ],
            "NS": [
                "dns0.cl.cam.ac.uk.",
                "auth2.dns.cam.ac.uk.",
                "auth3.dns.cam.ac.uk.",
                "dns0.eng.cam.ac.uk.",
                "auth0.dns.cam.ac.uk.",
                "auth1.dns.cam.ac.uk.",
                "ns2.ic.ac.uk.",
                "ns3.mythic-beasts.com.",
                "ns1.mythic-beasts.com."
            ],
            "SOA": [
                "primary.dns.cam.ac.uk. hostmaster.cam.ac.uk. 2935692477 1200 180 1209600 3600"
            ],
            "CAA": [],
            "DS": [
                "17004 13 2 25425306C22124E8319210335A3085247EA8C74DF0BD0DD7FAAE5355 94D6C3D0"
            ],
            "DNSKEY": [
                "256 3 13 0hTKyqZBAp8eDtcIIvmsSNiO/1fV9uISjEibHmDL+LjxL1ii1OxB+eXK Cov1IITqdLBHf2YBr1YGCEqqbQUQnw==",
                "257 3 13 Ey5kNV5aH1ZwuGEoJoN2dHe09PZu5u14jNf5bT0Iulf6ZiXlkaHfcdMO 5jscs+EhUO9S1v65Pfi3hY/myPRaaQ=="
            ],
            "RRSIG": [
                "SOA 13 3 3600 20260818092705 20260808082705 35322 cam.ac.uk. BrOue8Q6sD31AnVhgIRKSh1LRFCJFA+kXpPGVzQnEBL7+hY2UjgPj36Z T+Hhwqs7HCpXelr9YJbzEMIealrdlw==",
                "TXT 13 3 3600 20260813002103 20260802235335 35322 cam.ac.uk. QlVcQYiQPj5CY4AGwLoOidjb0FKlrfjKr9PMe+KurlKdy8wNUGtKn/kc fDCcQig3uiKTqtHtE9O3pxacweHbgw==",
                "NS 13 3 86400 20260813004138 20260802235334 35322 cam.ac.uk. Alnczb69HsK3mwDvkFjl6f0u3gbKxb0IO02VQ/5qYvmQSwpWSBUTxBAD Zf7EA9SFZGpWAO9pAwa9dguMKZb71A==",
                "DS 8 3 3600 20260818144439 20260719131439 7336 ac.uk. H56g8BH+LeWE7lepHBjqFbJC1Zc9oo4EAf3nzdaUM9EBeHZ4OIbr0JCk OlzPPkwUV6YQEkfGmTzl8U+ZipnJZRSUA1TwqpdjmVFTHvqW2eZqQy6d Wrn4Cks3YcN5Sa99XbZm4wMgQpEqD+3yFHi8R3N4NSM5w+iMTFl9ppm/ svI=",
                "MX 13 3 3600 20260813001715 20260802235335 35322 cam.ac.uk. JHnRveMGnZvOyyNRk9Ii5QjvLXCITm1f+J3Q9juDvCGdPacvHAvkGrPi toXN+hUuI0ssE7OCY6q2FIHm69dPcQ=="
            ],
            "NSEC": [
                "_70725fda8496826e25113edf0717ec1e.cam.ac.uk. A NS SOA MX TXT AAAA LOC NAPTR RRSIG NSEC DNSKEY"
            ],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [
                "100 10 \"s\" \"x-eduroam:radius.tls\" \"\" _radsec._tcp.roaming.ja.net.",
                "50 50 \"s\" \"SIPS+D2T\" \"\" _sips._tcp.cam.ac.uk."
            ],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "23.185.0.2"
        ],
        "ipv6": [
            "2620:12a:8000::2",
            "2620:12a:8001::2"
        ]
    },
    "mail": {
        "spf": "v=spf1 include:_spf.cam.ac.uk include:spf.protection.outlook.com include:_spf.google.com include:spf.uk.odmad.quest-on-demand.com -all",
        "dmarc": "v=DMARC1; p=reject; pct=100; rua=mailto:dmarc-rua@dmarc.service.gov.uk, mailto:jiq3dpgf@ag.eu.dmarcian.com",
        "dkim_selector": "selector1",
        "dkim_host": "selector1._domainkey.cam.ac.uk",
        "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvXEAegwL0HeD3oBvzdhtUOjx+oKt5zpK6KPyn0eUNU10QrA8+KhRayvto/+4aiIYWtmn03pVXyMVl9K67bPkRrLreBYlc8ptPo3dVbr2m61LuqGHrewJDs+Ai3azaJ/6k0aK+RMM4GwaeMXjToYqOkOyo/Xez7wnNKkHTVHP74Ms8ASh6eWQR5otgGXtdIJ+4AgIW3jde6UrlIMR+6wM0vn/HnT2lenByMOjSONg3hE2Omitw+Gx7+XBS2KWRUMckAQT+ASBtcw9DBx2CXJ6VMSMsxTXTstPEBEBW6CfcRdqWVQl8dDupUymLMsMrb0Q4SEpn48pxfoeyUVE+rqcHQIDAQAB;",
        "spf_analysis": {
            "valid": true,
            "lookups": 4,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "reject"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": "v=TLSRPTv1;rua=mailto:jiq3dpgf@tls.eu.dmarcian.com"
    },
    "advanced": {
        "ptr": "",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "23.185.0.2"
                    ],
                    "time_ms": 40.3
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "23.185.0.2"
                    ],
                    "time_ms": 25.36
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "23.185.0.2"
                    ],
                    "time_ms": 26.4
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "23.185.0.2"
                    ],
                    "time_ms": 139.91
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "23.185.0.2"
                    ],
                    "time_ms": 47.51
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Let's Encrypt",
        "subject": "cam.ac.uk",
        "valid_from": "2026-07-27T03:12:18-05:00",
        "valid_to": "2026-10-25T03:12:17-05:00",
        "days_remaining": 77,
        "san": [
            "cam.ac.uk",
            "www.cam.ac.uk"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_128_GCM_SHA256"
    },
    "http": {
        "url": "https://www.cam.ac.uk/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "retry-after": "0",
            "server": "nginx",
            "location": "https://www.cam.ac.uk/",
            "x-pantheon-redirect": "primary-domain-policy-doc",
            "accept-ranges": "bytes",
            "date": "Sat, 08 Aug 2026 23:09:16 GMT",
            "via": "1.1 varnish, 1.1 varnish, 1.1 varnish, 1.1 varnish",
            "x-served-by": "cache-ams-eham8680069-AMS, cache-stl760063-STL, cache-stl760070-STL, cache-stl760070-STL",
            "x-cache": "HIT, HIT, MISS, MISS",
            "x-cache-hits": "3, 0, 0, 0",
            "x-timer": "S1786230557.601671,VS0,VE104",
            "content-length": "110953",
            "cache-control": "max-age=300, public",
            "content-language": "en",
            "content-security-policy": "report-uri /report-csp-violation; upgrade-insecure-requests",
            "content-type": "text/html; charset=UTF-8",
            "etag": "W/\"1786208671\"",
            "expires": "Sun, 19 Nov 1978 05:00:00 GMT",
            "last-modified": "Sat, 08 Aug 2026 17:04:31 GMT",
            "permissions-policy": "autoplay=*, camera=self, fullscreen=*, geolocation=*, microphone=self, picture-in-picture=*, web-share=self",
            "referrer-policy": "strict-origin-when-cross-origin",
            "strict-transport-security": "max-age=31622400; includeSubDomains; preload",
            "x-content-type-options": "nosniff",
            "x-drupal-cache": "HIT",
            "x-drupal-dynamic-cache": "MISS",
            "x-frame-options": "SAMEORIGIN",
            "x-generator": "Drupal 10 (https://www.drupal.org)",
            "x-pantheon-styx-hostname": "styx-eu-a-6975d949c6-x462n",
            "x-styx-req-id": "e454c666-935a-11f1-8ab6-c61332fdcf08",
            "age": "71",
            "vary": "Accept-Encoding, Cookie, Cookie, Cookie"
        },
        "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.cam.ac.uk/",
        "title": "University of Cambridge",
        "description": "The University of Cambridge is one of the world’s leading universities, with a rich history of radical thinking dating back to 1209.",
        "success": true,
        "error": "",
        "status": 206
    },
    "network": {
        "23.185.0.2": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "cam-ac-uk.mail.protection.outlook.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 24.3,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 4055.7,
                "banner": "",
                "error": "Connection timed out"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 4021.2,
                "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": 80.35
}