{
    "ok": true,
    "domain": "windguru.cz",
    "generated_at": "2026-08-10T15:55:36-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 81,
        "label": "Good",
        "categories": {
            "dns": 85,
            "mail": 90,
            "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": "3 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": "2 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": "97 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: web.windguru.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",
                "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": "3 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": "2 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": "97 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: web.windguru.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": "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": [
                "82.208.41.65"
            ],
            "AAAA": [],
            "CNAME": [],
            "MX": [
                "10 mailin1.windguru.cz.",
                "100 mailin2.windguru.cz."
            ],
            "TXT": [
                "\"google-site-verification=-bjSLyX4Z7pAmJaOer0p_6m3c7eEfdnV44TRV_aCQK8\"",
                "\"v=spf1 ip4:82.208.41.65 ip4:165.22.91.61 mx include:spf.active24.com include:_spf.m1.websupport.sk include:_spf.google.com -all\""
            ],
            "NS": [
                "ns1.websupport.cz.",
                "ns3.websupport.eu.",
                "ns2.websupport.cz."
            ],
            "SOA": [
                "ns1.websupport.cz. admin.websupport.cz. 1767621268 7200 2048 1048576 2560"
            ],
            "CAA": [],
            "DS": [
                "58449 13 2 103407AFFBED74F491D7C300126C0DA86AB4063E6480E27ECCE12B29 44B5D161"
            ],
            "DNSKEY": [
                "257 3 13 7Ab0JTcPBuLStjKxMkTYkEi7WFpXtBBLIl0h+g4AC4yDIdW5oXfuN8Bu HPVJJ3NId+uLEexSIqSeyrWtyy2W9w==",
                "256 3 13 6aXh4N4fmE+/wfABFM0Gbq5tY2Xskb0FBRJflU77WWqlQv4em20K1+P7 5a5agaYrNSL/fFO8fu4LlW6dd5J6/w=="
            ],
            "RRSIG": [
                "SOA 13 2 86400 20260830000139 20260729223139 24966 windguru.cz. x584Nvq+LqVcPVrR7OpvOzsIm0wtqzc331/kiAU4tQ07EvOBit/RSTI8 69jcAOu5gzRkxqJK5KOypvdDZZVkRQ==",
                "NS 13 2 3600 20260828230139 20260728213139 24966 windguru.cz. AZkUG+09PtjEWCPIDHPAViLSREMYG6zgF0rtKrhTnzG030zEEixxHt46 8usHkkwZ8j9ShYINOCJG35PMKQHkcw==",
                "MX 13 2 600 20260828230139 20260728213139 24966 windguru.cz. bpy1hXyOin1ULKKX9KF3Di8j4E104aXHYXEzN48ddagn2MHgThAEQiuC 2g9tYAL6RJ4AMFFMlKIwOuomAf1YAA==",
                "DS 13 2 3600 20260823054724 20260809041724 5166 cz. 7dpuByptj+IyvJ38EtrtGPA3YxFdCpP5nT8DUsys6UlwURcMvRuaWu9z DTuAr9jTERVB3cnQ6ZZHjuh5EtljQQ==",
                "A 13 2 86400 20260828230139 20260728213139 24966 windguru.cz. bUOLIfTfOGutdf+0QX6rMIMb7G2V/ZAIkBlQuJiS0kqimb/MdafyFzIL 3wUrHBf07GBL8tlD+S0Z/ATQ8QjgFQ=="
            ],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "82.208.41.65"
        ],
        "ipv6": []
    },
    "mail": {
        "spf": "v=spf1 ip4:82.208.41.65 ip4:165.22.91.61 mx include:spf.active24.com include:_spf.m1.websupport.sk include:_spf.google.com -all",
        "dmarc": "v=DMARC1; p=none; rua=mailto:vh@windguru.cz; pct=100; adkim=r; aspf=r",
        "dkim_selector": "mail",
        "dkim_host": "mail._domainkey.windguru.cz",
        "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnQJqE09ndg/RPzPvkyvNL9XEW4d6h7fx0XoI9Upka4SodnVb1NtvloBHHQkzL4UxqJlW9BD/4eUJbkvBQuvFf3BfFcAq1vcKFRgl39UVVYF+w0s66g2qeM4beAqdm+VeVz+d48mWx6nEy9lFXAqJjt9UsWcrMSadOBAtGSlnsZlV80ZdFem5jZbOnDsCIVXJvqxLRQKGfhUlY5Fvsh6TdCUXNNk0OdOpDt07iRB8opTP0kKWLmS+jyxRw35KLbyx/REb6gDrUGQ/Gl4LD3mXQDezVmqO3cTJnN7s1NdRTqhGPfndByVOH8O8Qf25nfPqG+k/6DyUO3QMmbC0DcZOcQIDAQAB",
        "spf_analysis": {
            "valid": true,
            "lookups": 4,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "none"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "web.windguru.cz",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "82.208.41.65"
                    ],
                    "time_ms": 67.03
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "82.208.41.65"
                    ],
                    "time_ms": 119.23
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "82.208.41.65"
                    ],
                    "time_ms": 50.66
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "82.208.41.65"
                    ],
                    "time_ms": 272.63
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "82.208.41.65"
                    ],
                    "time_ms": 67.72
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "DigiCert Inc",
        "subject": "*.windguru.cz",
        "valid_from": "2026-04-30T19:00:00-05:00",
        "valid_to": "2026-11-15T17:59:59-06:00",
        "days_remaining": 97,
        "san": [
            "*.windguru.cz",
            "windguru.cz"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://www.windguru.cz/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "content-length": "0",
            "location": "https://www.windguru.cz/",
            "x-powered-by": "PHP/8.3.31",
            "set-cookie": "session=f7720eaab9c1f41620bab2adcb602579; expires=Mon, 10 Aug 2026 21:25:35 GMT; Max-Age=1800; path=/; secure",
            "expires": "Mon, 10 Aug 2026 20:55:35 GMT",
            "last-modified": "Mon, 10 Aug 2026 20:55:35 GMT",
            "content-security-policy": "frame-ancestors 'self'",
            "cache-control": "proxy-revalidate, no-store",
            "pragma": "no-cache",
            "content-type": "text/html; charset=utf-8",
            "accept-ranges": "bytes",
            "date": "Mon, 10 Aug 2026 20:55:34 GMT",
            "server": "lighttpd/1.4.79"
        },
        "security_checks": {
            "strict-transport-security": false,
            "content-security-policy": true,
            "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": "lighttpd/1.4.79",
        "powered_by": "PHP/8.3.31"
    },
    "webpage": {
        "url": "https://www.windguru.cz/",
        "title": "Windguru",
        "description": "Special wind and weather forecasts for windsurfing, kitesurfing and other wind related sports. Forecasts for any location on planet Earth!",
        "success": true,
        "error": "",
        "status": 200
    },
    "network": {
        "82.208.41.65": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "mailin1.windguru.cz",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 24.5,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 123.1,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 146.3,
                "banner": "",
                "error": "Network is unreachable"
            }
        ]
    },
    "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": 115.05
}