{
    "ok": true,
    "domain": "kth.se",
    "generated_at": "2026-08-09T01:35:41-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 91,
        "label": "Excellent",
        "categories": {
            "dns": 100,
            "mail": 90,
            "security": 76,
            "network": 85,
            "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": "5 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": 5,
                "lost_points": 0,
                "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": "4 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": "11 day(s) remaining."
            },
            {
                "category": "security",
                "title": "Certificate lifetime",
                "max_points": 10,
                "earned_points": 2,
                "lost_points": 8,
                "detail": "Full points require at least 30 days remaining."
            },
            {
                "category": "security",
                "title": "HTTP security headers",
                "max_points": 35,
                "earned_points": 19,
                "lost_points": 16,
                "detail": "5 of 9 evaluated headers detected."
            },
            {
                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "PTR: ns-vip-01.sys.kth.se"
            },
            {
                "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": "1 IPv6 address(es) detected.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "Name server redundancy",
                "detail": "5 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": "ok",
                "title": "CAA policy",
                "detail": "Certificate authority restriction.",
                "category": "dns",
                "max_points": 5,
                "earned_points": 5,
                "lost_points": 0
            },
            {
                "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": "4 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": "11 day(s) remaining.",
                "category": "security",
                "max_points": 55,
                "earned_points": 55,
                "lost_points": 0
            },
            {
                "level": "warning",
                "title": "Certificate lifetime",
                "detail": "Full points require at least 30 days remaining.",
                "category": "security",
                "max_points": 10,
                "earned_points": 2,
                "lost_points": 8
            },
            {
                "level": "warning",
                "title": "HTTP security headers",
                "detail": "5 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 19,
                "lost_points": 16
            },
            {
                "level": "ok",
                "title": "PTR reverse DNS",
                "detail": "PTR: ns-vip-01.sys.kth.se",
                "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": "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": [
                "130.237.28.40"
            ],
            "AAAA": [
                "2001:6b0:1:11c2::82ed:1c28"
            ],
            "CNAME": [],
            "MX": [
                "20 mailfilter-ng-2.sunet.se.",
                "10 mailfilter-ng-1.sunet.se.",
                "10 mailfilter-ng-3.sunet.se.",
                "10 mailfilter-ng-4.sunet.se."
            ],
            "TXT": [
                "\"v=spf1 include:_spf.kth.se include:customers.clickdimensions.com ~all\"",
                "\"google-site-verification=6B_ijtuPLs8QEQOrY6CA9KNR6x_Tlq9h87fvzbQcTGk\"",
                "\"include:_spf.eu.messagegears.net\"",
                "\"facebook-domain-verification=ybxcywd9y5omfyzv9a4hi1122pxhys\"",
                "\"atlassian-domain-verification=bdViuC6aa8uovu2aPgsZjA4zglkgbkqx7eCtfJtIXi6uWFglmI96V2EdENETiV1k\"",
                "\"HARICA-2QmDZC3DyhpI9p6wUi3\"",
                "\"apple-domain-verification=yiK5a1btuIncRk6Q\"",
                "\"MS=ms86914267\"",
                "\"mentimeter-22c50963-9801-4565-a424-07d4a1e2c1c9\"",
                "\"adobe-idp-site-verification=9cb3a0e2a6197322d0dd6d29de0e1ac1ce9f990e3d5bd864aa4c19007f78ef91\"",
                "\"KTH Royal Institute of Technology, SWEDEN\""
            ],
            "NS": [
                "b.ns.kth.se.",
                "e.ns.kth.se.",
                "a.ns.kth.se.",
                "sunic.sunet.se.",
                "ns2.chalmers.se."
            ],
            "SOA": [
                "a.ns.kth.se. hostmaster.kth.se. 2026080923 14400 900 604800 86400"
            ],
            "CAA": [
                "0 issue \"sectigo.com\"",
                "0 issue \"harica.gr\"",
                "0 issue \"letsencrypt.org\"",
                "0 issue \"digicert.com\""
            ],
            "DS": [
                "52831 8 2 A8E4D57A904B2D583EFFB47BF4F45DA82B930D018BCDE5FE094E72C4 D5687A48"
            ],
            "DNSKEY": [
                "257 3 8 AwEAAdclJQ603lKyef68/6e/m3Xn6Ng0Ph0x2Rg6B311hk43rrR1xAc2 WfwTHCkvoukR5rrRPTHaMOfCUbWeJZXaJLhhzVJeR0l4maekQ/eaZadg lX2E4tg3eYWPe2yg2IAVWLkVHJiYL78Oh0Xib29OWndptE66tMIFSGMo 136ZjOlKiMf9wwWkVLDRUxUeyVFE9DUM1I8+Rj6ws84UtGyVJYy/82iN U6I2iC4X+/2fyaopkNqCzuiRZRewATCqHvza6wpQGO5qqEE1Ol6v3gCg nP6dHdA+qfc32NI5zncRK1Y2VZxM9+C4dOOUCJQ2iAb9x/Bjue8NhixB LOaeLBbznsc=",
                "256 3 8 AwEAAcX74sXgnIHMLBd/Q7EK7qFXlUym9qST0qxoxGvrFT9x231pOplh OfbnGw9DOW265DS9OQNbyo+jozYJRKs//gcKdmffW3pRRxKlhJGOUZJ+ BETklrgf7/DXH0lTDgJ0TZO9G8MfJFGXFVUbc5g/iv7TyxcQmf/MRvBw 9Pofb1S+ZoSuvwX0IloHJVvAWgWb15uJpoUNhFVUnP4QHh9saqMYL4sV 2B/8/Vw7jUrIwi2Lo6nUepv7QjjimyUnajAdiDyK5W7ChIvviuf5ZtPy gKPHKfEqDMA/UufhoRPbdWKvl8218f4QrWKYjsS0xT8O08Q2M/AA3myh faAdEUWbU1k="
            ],
            "RRSIG": [
                "A 8 2 7200 20260905215418 20260806205853 35811 kth.se. jg1Cr6nZ/GHSW1D2tJ3lDT/QsnMlKVZUh3aNVClq8ea8+L1SWaivx4JV d2hDI80/7btaSdAfTjO01bVoPPsft8GTlgkRRYzlZqp9wqZLf96h63Bb 3wSe2nojj4HgXGKm1xzkNr9TBwLiZC9ym2N1pqoXyfFyxtA4LWV7ln9G ZerI83aXMF4IwjASzkIaZpk72zJnKMBeRtXj2qMIlVPMSAugGfnxW4Ug LiJ/ks/8Dczmjll0SIs5/5n2UWJINZvkxQjNc0gYGldJb77TYVZA7tfu 0L92NTvuHstKRb2XFdiBaxiOAV6iH5SDjOx6GxEyaazyM81tJszM+TLE ndtKuQ==",
                "DS 8 2 3600 20260823031137 20260809014137 9573 se. O0fMReQwn4aRXgu4ia82ZtJF/IKMADO0Csw7HrOwJvxA6Spi6tkGoZyb grCnLzQH02fV56930el3sMhwBJHN1wluU0SdaK+QaH32XVSf2qEdRID0 diui/Jra2giy+1rIm1m8yq4E1w3kcwRwxD1NWluIzd2P1AObp0YnAwZb ehGpoMi8RJsbTIjlRC4b78V/SQw7Bb3ykz7U0ptBUXX5CXFos2JUivHV pKzMv9aZ6o/ZGDw0fTrTAXzO6hfsUqvDY1nMKSCl1COnnIgdhXqdkuFJ 9boZ9oh3ybQrC9WJyJN65EdsIz3bEn7UW4HWufqGjKxfB/ic2P5+5ROh PGiNtQ==",
                "CAA 8 2 7200 20260904103400 20260805101555 35811 kth.se. tkf2ubSukXho4cR28oCfHSwj/K8a/9XNJ+bLEnnFFiAXqddgq/uTqQle Rctd1zbv/rDyOPaZ+QAvo3QhDNd7Nr8eHwC4cCiYb02lBjA4uhndvfAa 4RPpR99EeWUEbICLA5mFcS1GtER5xW6oVwBN4h1Riq+esTkmeh4Y8/r8 t2ec1NvkicicEU/hfPTqiGPQYI+Rv8KcxKGgRG1KhzZPeSqJgRJRoeNU yR0Z0/RYyaYJv2fIbtlLPoI2FUXqm12jyJz1bY2nCAtKiU+xMpBLU5N2 dsLu8VnRkeqx0l5H1Q/eg4hVMdogtGIwlAzIDmx7nwQ0+XM1e+6HtzBN 7aYehA=="
            ],
            "NSEC": [
                "_8c90d4aaf6eb6a0597d8a13598c48c5d.kth.se. A NS SOA MX TXT AFSDB AAAA RRSIG NSEC DNSKEY CAA"
            ],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "130.237.28.40"
        ],
        "ipv6": [
            "2001:6b0:1:11c2::82ed:1c28"
        ]
    },
    "mail": {
        "spf": "v=spf1 include:_spf.kth.se include:customers.clickdimensions.com ~all",
        "dmarc": "v=DMARC1;p=reject;pct=100;rua=mailto:dmarc-admin@kth.se",
        "dkim_selector": "default",
        "dkim_host": "default._domainkey.kth.se",
        "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkWYVVrcCLYg845ds+Mm2mLNAMzRFf4PJ9F1LhpzSO3toZQzKBTY+0T27WyJu5R/g86tZHZCIvBAdeUWvsiw9LityPGHZts7qoRPGAk6DPXWEWGJhmdcGLcxRJX7kNn1JvXpVLywnzoLRL/YYs42emR8LK1uqWZ22m2CPtNuoJ2QIDAQAB",
        "spf_analysis": {
            "valid": true,
            "lookups": 2,
            "final": "~all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "reject"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "ns-vip-01.sys.kth.se",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "130.237.28.40"
                    ],
                    "time_ms": 57.36
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "130.237.28.40"
                    ],
                    "time_ms": 156.92
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "130.237.28.40"
                    ],
                    "time_ms": 179.81
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "130.237.28.40"
                    ],
                    "time_ms": 1175.68
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "130.237.28.40"
                    ],
                    "time_ms": 40.98
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Hellenic Academic and Research Institutions CA",
        "subject": "ns-vip-01.sys.kth.se",
        "valid_from": "2025-08-20T03:03:25-05:00",
        "valid_to": "2026-08-20T03:03:25-05:00",
        "days_remaining": 11,
        "san": [
            "ns-vip-01.sys.kth.se",
            "www.kth.se",
            "kth.se"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_CHACHA20_POLY1305_SHA256"
    },
    "http": {
        "url": "https://www.kth.se/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "location": "https://www.kth.se/",
            "strict-transport-security": "max-age=63072000",
            "cache-control": "public, max-age=120",
            "pragma": "no-cache",
            "vary": "Access-Control-Request-Headers",
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