{
    "ok": true,
    "domain": "io.vn",
    "generated_at": "2026-08-10T12:53:54-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 15,
        "label": "Critical",
        "categories": {
            "dns": 45,
            "mail": 0,
            "security": 0,
            "network": 0,
            "availability": 20
        },
        "category_weights": {
            "dns": 25,
            "mail": 20,
            "security": 25,
            "network": 10,
            "availability": 20
        },
        "items": [
            {
                "category": "dns",
                "title": "IPv4 (A)",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30,
                "detail": "0 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": "8 NS record(s); 2 or more required."
            },
            {
                "category": "dns",
                "title": "SOA record",
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                "earned_points": 10,
                "lost_points": 0,
                "detail": "Authoritative zone record."
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            {
                "category": "dns",
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                "earned_points": 15,
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                "detail": "DS and DNSKEY detected."
            },
            {
                "category": "dns",
                "title": "CAA policy",
                "max_points": 5,
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                "lost_points": 5,
                "detail": "Certificate authority restriction."
            },
            {
                "category": "dns",
                "title": "DNS propagation",
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            },
            {
                "category": "mail",
                "title": "MX records",
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                "earned_points": 0,
                "lost_points": 20,
                "detail": "0 MX record(s)."
            },
            {
                "category": "mail",
                "title": "SPF",
                "max_points": 25,
                "earned_points": 0,
                "lost_points": 25,
                "detail": "SPF policy not found."
            },
            {
                "category": "mail",
                "title": "DMARC",
                "max_points": 25,
                "earned_points": 0,
                "lost_points": 25,
                "detail": "DMARC policy not found."
            },
            {
                "category": "mail",
                "title": "DKIM",
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                "earned_points": 0,
                "lost_points": 20,
                "detail": "No tested DKIM selector responded."
            },
            {
                "category": "mail",
                "title": "MTA-STS",
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                "lost_points": 5,
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            },
            {
                "category": "mail",
                "title": "TLS-RPT",
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                "lost_points": 5,
                "detail": "TLS reporting policy."
            },
            {
                "category": "security",
                "title": "Valid TLS certificate",
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                "earned_points": 0,
                "lost_points": 55,
                "detail": "No valid certificate was retrieved."
            },
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                "category": "security",
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                "detail": "0 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": 0,
                "lost_points": 35,
                "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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                "max_points": 40,
                "earned_points": 0,
                "lost_points": 40,
                "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."
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        "diagnostics": [
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                "detail": "0 IPv4 address(es) detected.",
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                "lost_points": 30
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                "level": "error",
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                "category": "dns",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10
            },
            {
                "level": "ok",
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                "category": "dns",
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                "earned_points": 20,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "SOA record",
                "detail": "Authoritative zone record.",
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                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DNSSEC chain",
                "detail": "DS and DNSKEY detected.",
                "category": "dns",
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                "earned_points": 15,
                "lost_points": 0
            },
            {
                "level": "error",
                "title": "CAA policy",
                "detail": "Certificate authority restriction.",
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                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
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            {
                "level": "error",
                "title": "DNS propagation",
                "detail": "Agreement between public resolvers.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10
            },
            {
                "level": "error",
                "title": "MX records",
                "detail": "0 MX record(s).",
                "category": "mail",
                "max_points": 20,
                "earned_points": 0,
                "lost_points": 20
            },
            {
                "level": "error",
                "title": "SPF",
                "detail": "SPF policy not found.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 0,
                "lost_points": 25
            },
            {
                "level": "error",
                "title": "DMARC",
                "detail": "DMARC policy not found.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 0,
                "lost_points": 25
            },
            {
                "level": "error",
                "title": "DKIM",
                "detail": "No tested DKIM selector responded.",
                "category": "mail",
                "max_points": 20,
                "earned_points": 0,
                "lost_points": 20
            },
            {
                "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": "error",
                "title": "Valid TLS certificate",
                "detail": "No valid certificate was retrieved.",
                "category": "security",
                "max_points": 55,
                "earned_points": 0,
                "lost_points": 55
            },
            {
                "level": "error",
                "title": "Certificate lifetime",
                "detail": "Full points require at least 30 days remaining.",
                "category": "security",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10
            },
            {
                "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": "error",
                "title": "PTR reverse DNS",
                "detail": "PTR not detected.",
                "category": "network",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30
            },
            {
                "level": "error",
                "title": "IPv4 diversity",
                "detail": "Two or more IPv4 addresses receive full points.",
                "category": "network",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35
            },
            {
                "level": "error",
                "title": "IPv6 connectivity",
                "detail": "AAAA availability.",
                "category": "network",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35
            },
            {
                "level": "error",
                "title": "DNS resolution",
                "detail": "At least one address family must resolve.",
                "category": "availability",
                "max_points": 40,
                "earned_points": 0,
                "lost_points": 40
            },
            {
                "level": "error",
                "title": "HTTP response",
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                "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": {
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            "A": [],
            "AAAA": [],
            "CNAME": [],
            "MX": [],
            "TXT": [],
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                "e.dns-servers.vn.",
                "a.dns-servers.vn.",
                "f.dns-servers.vn.",
                "h.dns-servers.vn.",
                "d.dns-servers.vn.",
                "g.dns-servers.vn.",
                "b.dns-servers.vn."
            ],
            "SOA": [
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            ],
            "CAA": [],
            "DS": [
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            "DNSKEY": [
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            ],
            "RRSIG": [
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                "DNSKEY 8 2 43200 20260820165146 20260721160404 63499 io.vn. a+02dFWTgOCX4s6c31JNP8ABV44AdNYvJfmD7QSXnp6Ii3yHd5e91o4f XsWbEKHV69882ZWzUA+Bw+x2z7XcBCxULuLEUuLN1iQHgeUEUWePP/VF F5qR9a8SuZh3sBu46cP8AAH2nnxx6lJPUXj7oOFA8tsCOIh1IF1hFkO/ L3E=",
                "NS 8 2 43200 20260820120628 20260721112857 63499 io.vn. ShpzQ3UZHTeaYaroxzaAzPuhqHmRLKa7a67zctbwRcgPd+VaDvIb5283 5Q8ausb4BjDM+uujJmMH6wL/BUZ+/++Q5hcLRqcFJseIy/I45ygycSHS T3/EBzw3u+ktcCgrnSQBhqTlnYXOqwuk/fkibajKsl0N96opjc26Ho6v 2lo=",
                "SOA 8 2 43200 20260909162505 20260810152505 63499 io.vn. S9Fap8NkEmHYHhO93sv0nTI0iL+v6moJcq4G4msV0iB+L2cktnbLKJia ww59JopQj5T/+gtEv39Y1IdE3dExiWZ8ngTiU7lntcoyqkvRWgu6X93Z 6Yp5+fhEerWE5A+38a9eZQuWctDQDUfULka2ooTixFW0F1f4j1+Q0j2i 5ac="
            ],
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            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [],
        "ipv6": []
    },
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        "spf": "",
        "dmarc": "",
        "dkim_selector": "x",
        "dkim_host": "",
        "dkim": "",
        "spf_analysis": {
            "valid": false,
            "lookups": 0,
            "final": "",
            "message": "Not published"
        },
        "dmarc_analysis": {
            "valid": false,
            "policy": ""
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "",
        "propagation": {
            "consistent": false,
            "results": [
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                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [],
                    "time_ms": 67.22
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
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                    "time_ms": 24.64
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                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [],
                    "time_ms": 273.59
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [],
                    "time_ms": 151.76
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [],
                    "time_ms": 292.53
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    "ssl": {
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        "issuer": "",
        "subject": "",
        "valid_from": "",
        "valid_to": "",
        "days_remaining": null,
        "san": [],
        "protocol": "",
        "cipher": "",
        "error": "php_network_getaddresses: getaddrinfo failed: No address associated with hostname"
    },
    "http": {
        "url": "https://io.vn/",
        "status": "",
        "http_version": "0",
        "headers": [],
        "security_checks": {
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            "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://io.vn/",
        "title": "",
        "description": "",
        "success": false,
        "error": "Could not resolve host: io.vn"
    },
    "network": [],
    "smtp": {
        "host": "io.vn",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 38.6,
                "banner": "",
                "error": "php_network_getaddresses: getaddrinfo failed: No address associated with hostname"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 1.3,
                "banner": "",
                "error": "php_network_getaddresses: getaddrinfo failed: No address associated with hostname"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 1.3,
                "banner": "",
                "error": "php_network_getaddresses: getaddrinfo failed: No address associated with hostname"
            }
        ]
    },
    "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": 78.64
}