{
    "ok": true,
    "domain": "cvut.cz",
    "generated_at": "2026-08-09T08:06:25-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 71,
        "label": "Fair",
        "categories": {
            "dns": 85,
            "mail": 90,
            "security": 61,
            "network": 50,
            "availability": 60
        },
        "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": "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": 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": 0,
                "lost_points": 5,
                "detail": "TLS reporting policy."
            },
            {
                "category": "security",
                "title": "Valid TLS certificate",
                "max_points": 55,
                "earned_points": 55,
                "lost_points": 0,
                "detail": "18 day(s) remaining."
            },
            {
                "category": "security",
                "title": "Certificate lifetime",
                "max_points": 10,
                "earned_points": 6,
                "lost_points": 4,
                "detail": "Full points require at least 30 days remaining."
            },
            {
                "category": "security",
                "title": "HTTP security headers",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35,
                "detail": "0 of 9 evaluated headers detected."
            },
            {
                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "PTR: webmm-pub.is.cvut.cz"
            },
            {
                "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",
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                "earned_points": 40,
                "lost_points": 0,
                "detail": "At least one address family must resolve."
            },
            {
                "category": "availability",
                "title": "HTTP response",
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                "earned_points": 0,
                "lost_points": 40,
                "detail": "No successful HTTP response."
            },
            {
                "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",
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                "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": "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": "18 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": 6,
                "lost_points": 4
            },
            {
                "level": "error",
                "title": "HTTP security headers",
                "detail": "0 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35
            },
            {
                "level": "ok",
                "title": "PTR reverse DNS",
                "detail": "PTR: webmm-pub.is.cvut.cz",
                "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": "error",
                "title": "HTTP response",
                "detail": "No successful HTTP response.",
                "category": "availability",
                "max_points": 40,
                "earned_points": 0,
                "lost_points": 40
            },
            {
                "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": [
                "147.32.3.202"
            ],
            "AAAA": [],
            "CNAME": [],
            "MX": [
                "0 cvut-cz.i-v1.mx.microsoft."
            ],
            "TXT": [
                "\"atlassian-domain-verification=rDtcgrRqfCu57VGnzGB8tCqBnMPAks3o5jhfw7hBb4uT/84gkk9aNX10HZjlwTJS\"",
                "\"seIBuNBcvNeK9+Evkcig5KdavRRhFXEzhGCeU3BmsLh6L7Mn8VU0nd9RFxwJ7mKwKVETcgRw/COCLKtAjLRsjg==\"",
                "\"apple-domain-verification=C6yIfuZzShjeDRIF\"",
                "\"google-site-verification=CYYVcmesbYpla_zqVXhOjstTrXfGdoPFA23lBIJ\"",
                "\"atlassian-domain-verification=qCOXRhgb/aDA39Ywd9RBNeUvFjtLRjQ4e1ax9kZuAhVHjbGrOHi/KTAA8qxPFsg3\"",
                "\"cisco-ci-domain-verification=e5bc5596041bbfe889ea0981934f35e45ff09c125359cdd2963be8a813050bd\"",
                "\"anthropic-domain-verification-q0acmw=bJTNkfCFhi6mrR4yD8BMQbESK\"",
                "\"v=spf1 ip4:147.32.235.25 ip6:2001:718:2:2202::25 include:spf.protection.outlook.com include:_spf1.cvut.cz -all\""
            ],
            "NS": [
                "nss.cvut.cz.",
                "ns.cvut.cz."
            ],
            "SOA": [
                "ns.cvut.cz. hostmaster.cvut.cz. 13179 14401 3600 1209600 86400"
            ],
            "CAA": [],
            "DS": [
                "41860 13 2 2311D5DF154638BEFA68B593C52E6B6C72060E33FF020392FA527B1F 4C3BF3B3"
            ],
            "DNSKEY": [
                "257 3 13 +XkJfh9Fh5wGJVpntLyKQRXkrRQhP+kL3lnJ1SQfG3XTjW9WBBknfO37 yynPQtat8S+kIuOJZaSgkLmMfS8drQ=="
            ],
            "RRSIG": [
                "DNSKEY 13 2 6400 20260829064014 20260730062535 41860 cvut.cz. gJdooO8VdE+PQdskSk+us8XT8MmeAu0Fw9P+cKCvof1VmTumlKNRmLva 19WrxjcBK15/86Yq2abxDQxlsQ31jA==",
                "A 13 2 6400 20260903112918 20260804104310 41860 cvut.cz. 2rSHSGQp0+2WIZ6yZqExPuI/HliOnzSMCNrZ93nxLJmjaz+yOgf2S+gu DxB2qvQiiAu98MJ4xTiSt/SyQQQG2A==",
                "NS 13 2 6400 20260903121124 20260804112916 41860 cvut.cz. Z2rkX+YOgYY59XCBF9+iVCrYgoV1uotcg08EP+cvg56SSCclibEP1Zpx 0/zTQYOlLPX/HRZedYlbKLpqOrdRmg==",
                "MX 13 2 6400 20260903124222 20260804120428 41860 cvut.cz. yc4OljzP2PyFcmSmKQOHYgQQpoucHkvnbb6ouw6ccrxD5Xis5r6E6Ovf 5JjRLNquYtJV06gU00wgvDDieEagCw==",
                "DS 13 2 3600 20260823054724 20260809041724 5166 cz. Cy98J5aPRRvKuDgSFMlQybLFoCByvU5Nf96k9V7+z/p7TlF6P/4f9fus fnR/jpNuCZ2aUPPhPICEJEvhUGn5mw=="
            ],
            "NSEC": [
                "_dmarc.cvut.cz. A NS SOA MX TXT RRSIG NSEC DNSKEY"
            ],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "147.32.3.202"
        ],
        "ipv6": []
    },
    "mail": {
        "spf": "v=spf1 ip4:147.32.235.25 ip6:2001:718:2:2202::25 include:spf.protection.outlook.com include:_spf1.cvut.cz -all",
        "dmarc": "v=DMARC1; p=reject; rua=mailto:dmarc-rua@dmarc.civ.cvut.cz",
        "dkim_selector": "selector1",
        "dkim_host": "selector1._domainkey.cvut.cz",
        "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCI24T+NS6FqVHhAR52Fqg7Q/ylk/mSmBUPaBapf5dmO4ehSsNrWK3KvZfYPbVUkust7zW/jY4AF9Kxyof0qpz/vfo4qNaFZm8D8XqYSLoAsgpcaMCSE+SlRT9+/LLK286hLVPD+HhGgc9UjGpfF1AJDkaamfzCpYjzrc2pbFh+kQIDAQAB; n=1024,1455839651,1471564451",
        "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": "webmm-pub.is.cvut.cz",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "147.32.3.202"
                    ],
                    "time_ms": 189
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "147.32.3.202"
                    ],
                    "time_ms": 149.37
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "147.32.3.202"
                    ],
                    "time_ms": 145.63
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "147.32.3.202"
                    ],
                    "time_ms": 156.22
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "147.32.3.202"
                    ],
                    "time_ms": 151.64
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Hellenic Academic and Research Institutions CA",
        "subject": "www.cvut.cz",
        "valid_from": "2025-08-27T08:31:14-05:00",
        "valid_to": "2026-08-27T08:31:14-05:00",
        "days_remaining": 18,
        "san": [
            "www.cvut.cz",
            "cvut.cz"
        ],
        "protocol": "TLSv1.2",
        "cipher": "ECDHE-RSA-AES256-GCM-SHA384"
    },
    "http": {
        "url": "https://cvut.cz/",
        "status": "",
        "http_version": "0",
        "headers": [],
        "security_checks": {
            "strict-transport-security": false,
            "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": "",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://cvut.cz/",
        "title": "",
        "description": "",
        "success": false,
        "error": "SSL certificate problem: unable to get local issuer certificate"
    },
    "network": {
        "147.32.3.202": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "cvut-cz.i-v1.mx.microsoft",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 18.2,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 4038.9,
                "banner": "",
                "error": "Connection timed out"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 4020.7,
                "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": 80.42
}