{
    "ok": true,
    "domain": "nihon-u.ac.jp",
    "generated_at": "2026-08-10T21:56:55-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 87,
        "label": "Good",
        "categories": {
            "dns": 95,
            "mail": 90,
            "security": 65,
            "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": "4 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": "5 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": "235 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": 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: 173.124.95.34.bc.googleusercontent.com"
            },
            {
                "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": "4 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": "5 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": "235 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": "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: 173.124.95.34.bc.googleusercontent.com",
                "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": [
                "34.95.124.173"
            ],
            "AAAA": [
                "2600:1901:0:6a1c::"
            ],
            "CNAME": [],
            "MX": [
                "10 alt3.aspmx.l.google.com.",
                "5 alt1.aspmx.l.google.com.",
                "1 aspmx.l.google.com.",
                "10 alt4.aspmx.l.google.com.",
                "5 alt2.aspmx.l.google.com."
            ],
            "TXT": [
                "\"adobe-idp-site-verification=9943308136e4952be2fa5562f529fe8fc038c09cacfe218a3d1c0f170a626b73\"",
                "\"google-site-verification=e-V4-uT_BwYhj0snR1hbSySFe0APSRiPRgee1tQCMig\"",
                "\"google-site-verification=M1YAiMi3sG_4pJbxFrChJ1B14_WOEQfhuVaXFgadxW8\"",
                "\"v=spf1 ip4:133.43.0.0/16 ip6:2001:df6:8000::/48 include:_spf.google.com include:amazonses.com include:spf.securemx.jp include:spf.curumeru.jp include:_spf.activegate-ss.jp include:mail.ma-jin.jp include:spf.protection.outlook.com -all\"",
                "\"apple-domain-verification=O0zzWzVYRObs4WF3\""
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            "NS": [
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                "ns007-zydu3gprqr7eyh2s.z.d-53.info.",
                "ns007-zydu3gprqr7eyh2s.z.d-53.net.",
                "ns007-zydu3gprqr7eyh2s.z.d-53.jp."
            ],
            "SOA": [
                "ns.nihon-u.ac.jp. hostmaster.nihon-u.ac.jp. 2026073101 3600 900 604800 86400"
            ],
            "CAA": [],
            "DS": [
                "22017 13 2 46146C70E3A015E07A7616D4ED63AD1B4BC7266F790F805EDCB8E85D 262699DF"
            ],
            "DNSKEY": [
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                "256 3 13 txBkZEknNtjlN5rXhQ2uPAsgQ8GjgyQKGIgtXMxFUZYN3+G2JU4TM5uk RuW6q8kIhvyOMKEH/Wr5p9pknAcG/A=="
            ],
            "RRSIG": [
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                "AAAA 13 3 86400 20260830074525 20260730074525 34320 nihon-u.ac.jp. VTRItYYs9BdzLWuYYSvVajUDJRMKp2GCNkZboVVIOuJhUqV5E44uTogu kzw4NEeN0tkFS2eYU82mV+VFtFHK6w==",
                "DNSKEY 13 3 28800 20260830074525 20260730074525 22017 nihon-u.ac.jp. 98KGNBgTMPvls9djSXUx7uEG6Yo123XPfQZO1Th2ivdxRJUe/t0a+XXD hQySHQ5da0R5CGmCK2smRAr5z8NmtQ==",
                "NS 13 3 86400 20260830074525 20260730074525 34320 nihon-u.ac.jp. r84kMU6ydbW1d9EAUMBUiVjToVEZJBtzzAfSip53b9mo3/h1szi/Zh2N 5y3qvMHEy/Jgpgp/A/MjP2crvdmoyA==",
                "SOA 13 3 86400 20260830074525 20260730074525 34320 nihon-u.ac.jp. DMwcHTvvhUb1gn6hRssWrtjxlfV7uQ4Dy3IBEW16WdrHS+qtlglBfd3H +U0c7TmAeap1nFaM5QyR8/+IvZsoEA=="
            ],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "34.95.124.173"
        ],
        "ipv6": [
            "2600:1901:0:6a1c::"
        ]
    },
    "mail": {
        "spf": "v=spf1 ip4:133.43.0.0/16 ip6:2001:df6:8000::/48 include:_spf.google.com include:amazonses.com include:spf.securemx.jp include:spf.curumeru.jp include:_spf.activegate-ss.jp include:mail.ma-jin.jp include:spf.protection.outlook.com -all",
        "dmarc": "v=DMARC1; p=quarantine; sp=none; rua=mailto:postmaster+rua@nihon-u.ac.jp; ruf=mailto:postmaster+ruf@nihon-u.ac.jp;",
        "dkim_selector": "google",
        "dkim_host": "google._domainkey.nihon-u.ac.jp",
        "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAj5UUoVqNoAylnv2k8gwGywyHG9hFvtwDfCgijvcNe5/nXSwRdUU7tFL665r3Xqlc6SRjoR5P+jJVrVqxrxmzsArIxhavEINebiEKrzGCnuUaVh7iTAXmqcEZn48GkcxgUtd6Exz2Pgbaxh3KuBRG+gNJk2h/AVTrWZbYY4QgS7Phz2KeokpsRI33fi27cPKV/TNmhvTUpaU2XWf7GTOkO7OokMAx7bwywMkE+FC2P3qilyfTkJRnCa+OvMZTntV4Q67rCD9ZXG+ad5FN5k+vywpJOZuomL8thghNEcRmE4tZvVihfnUMGgTM6Tl0pd2lDWzzdZ4pIm9m8bcahHpvYQIDAQAB",
        "spf_analysis": {
            "valid": true,
            "lookups": 7,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "quarantine"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "173.124.95.34.bc.googleusercontent.com",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "34.95.124.173"
                    ],
                    "time_ms": 187.34
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
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                    ],
                    "time_ms": 77.19
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "34.95.124.173"
                    ],
                    "time_ms": 50.04
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "34.95.124.173"
                    ],
                    "time_ms": 542.36
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
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                    ],
                    "time_ms": 66.85
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "SECOM Trust Systems Co., Ltd.",
        "subject": "www.nihon-u.ac.jp",
        "valid_from": "2026-03-03T02:05:04-06:00",
        "valid_to": "2027-04-03T03:05:04-05:00",
        "days_remaining": 235,
        "san": [
            "www.nihon-u.ac.jp",
            "nihon-u.ac.jp",
            "www.law.nihon-u.ac.jp",
            "law.nihon-u.ac.jp"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://www.nihon-u.ac.jp/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "server": "nginx/1.24.0 (Ubuntu)",
            "date": "Tue, 11 Aug 2026 02:56:46 GMT",
            "content-type": "text/html; charset=UTF-8",
            "content-length": "65003",
            "location": "https://www.nihon-u.ac.jp/",
            "expires": "Tue, 11 Aug 2026 02:56:45 GMT",
            "cache-control": "no-cache",
            "via": "1.1 google",
            "x-external-managed-migration-selected-scheme": "EXTERNAL_MANAGED",
            "alt-svc": "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
            "last-modified": "Sat, 08 Aug 2026 06:03:38 GMT",
            "vary": "Accept-Encoding",
            "etag": "\"6a76c6ba-fdeb\""
        },
        "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": "nginx/1.24.0 (Ubuntu)",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://www.nihon-u.ac.jp/",
        "title": "日本大学",
        "description": "日本大学公式サイト：「自主創造 - 日本大学 Nihon University - あなたとともに100万人の仲間とともに」～　日本大学は、日本一教育力のある総合大学を目指し、それぞれが学ぶ領域や活動体験を生かして「自主創造」の気風に満ちた人材の育成に力を入れています。",
        "success": true,
        "error": "",
        "status": 200
    },
    "network": {
        "34.95.124.173": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "alt3.aspmx.l.google.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 0.7,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 4020.7,
                "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": 114.35
}