{
    "ok": true,
    "domain": "ncu.edu.tw",
    "generated_at": "2026-08-10T22:44:42-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 84,
        "label": "Good",
        "categories": {
            "dns": 95,
            "mail": 80,
            "security": 61,
            "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": "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": 0,
                "lost_points": 20,
                "detail": "No tested DKIM selector responded."
            },
            {
                "category": "mail",
                "title": "MTA-STS",
                "max_points": 5,
                "earned_points": 5,
                "lost_points": 0,
                "detail": "Mail transport policy."
            },
            {
                "category": "mail",
                "title": "TLS-RPT",
                "max_points": 5,
                "earned_points": 5,
                "lost_points": 0,
                "detail": "TLS reporting policy."
            },
            {
                "category": "security",
                "title": "Valid TLS certificate",
                "max_points": 55,
                "earned_points": 55,
                "lost_points": 0,
                "detail": "22 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: 140-115-0-251.cc.ncu.edu.tw"
            },
            {
                "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/1.1 200 OK"
            },
            {
                "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": "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": "error",
                "title": "DKIM",
                "detail": "No tested DKIM selector responded.",
                "category": "mail",
                "max_points": 20,
                "earned_points": 0,
                "lost_points": 20
            },
            {
                "level": "ok",
                "title": "MTA-STS",
                "detail": "Mail transport policy.",
                "category": "mail",
                "max_points": 5,
                "earned_points": 5,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "TLS-RPT",
                "detail": "TLS reporting policy.",
                "category": "mail",
                "max_points": 5,
                "earned_points": 5,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "Valid TLS certificate",
                "detail": "22 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: 140-115-0-251.cc.ncu.edu.tw",
                "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/1.1 200 OK",
                "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": [
                "140.115.0.251"
            ],
            "AAAA": [
                "2001:288:3001::251"
            ],
            "CNAME": [],
            "MX": [
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                "5 mx1.cc.ncu.edu.tw."
            ],
            "TXT": [
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                "\"Foxit-domain-verification=968d063ee3b3e58d91c6b71226c3b655\"",
                "\"Zz0Cq-7HrEwmqpjcyjemyGATJps4hAvMf0Cmg3nzjNc\""
            ],
            "NS": [
                "dns1.ncu.edu.tw.",
                "dns.ncu.edu.tw.",
                "dns2.ncu.edu.tw."
            ],
            "SOA": [
                "dns.ncu.edu.tw. abuse.ncu.edu.tw. 2026080403 7200 3600 1209600 3600"
            ],
            "CAA": [],
            "DS": [
                "63823 10 2 9C5B44DC0A3DBA306D64F8FF2672EDED4DD59FBC85205933EC4AD6ED 50453D4D"
            ],
            "DNSKEY": [
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            ],
            "RRSIG": [
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                "TXT 10 3 21600 20260906170006 20260807170006 51666 ncu.edu.tw. LuroN3tvYwSLraKAn7JlRHzdnREHgtnrUw9Y3Nsna2T0isE375VgAxIz aFEfK2Sq///adb6xJ3oVNW4za6iG7wbicfkhue/aJ1LayMOe9u4fYRsY 0ZABi64OUYJZhsSuK5cNa6K0bXkxN4rKbJvuAuL2Ub/rcPca3d0NZDAS BSGafLG1fzZsW462y7W8uyrIH2hGgi3vkEkaD9UlTkkCXGtBCprATXZ2 Bk34b19OL02ziznXn4UPh8qIwXKxY7U3UeH67FYKN/lTNmIo7/1pM0pC 1G/tXz2v8scldI8dOPoAtmz0G5mUZUOOnnPtcZM+CHxLzWgqBQt55Vhu VhLQcw==",
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                "A 10 3 21600 20260906170006 20260807170006 51666 ncu.edu.tw. dFaiqL5fndhFLWgbcyql768PJWQQv6u2BOXvQqxtEUvful3YzVwyzf/B HaeH1JYQT29MSbl7HOqwCn7FKvvy5zQ7fpdHe7cEWge/y67pBJVdOOct OFVAIBLfEGOfTXOREjsZi9Oh0AbcFRIPDpKVRD0Non9l3OxtZ0n+qzqr Kz9oho293Zzd2eS/SNIqsVO5IA/Xqbda52RQqF29F4cJ0ibNBSwaT2Qr AsTK89i4nxdQcBUccKzRmJxL3wc7VoBecbMmKgPWEWNMjXc/VqGHnz+I 8SbjQ85L4qWUpQwe6TXbXfIWqUZVYgC6uFMfWm+DTX8YN4vEGh9CyBKC YYYTTA==",
                "NS 10 3 21600 20260906170006 20260807170006 51666 ncu.edu.tw. HGQXvmg9az/c5Ax9kE1gn/p4+dArgj0b/WHJqOb0TcKPm3s0cddX8xvy g2OjeGTU8nSgklEfViAfp9UQs37T//9xu3i0q0HCYFQkZOLAXD1CcBm5 jMQB1z61bjEwD9FNk/yKs1ekG5CLBJNKZjNL/rHy1Rx08c8R7b4JUPGJ 8RuzXesZDA4t5opl2T2/8tqPqx7YVLtkN4cd3pM5YaXXbpjNIqTM8O9G zDcCR619SQVj3f+KvYWCbm3FOe1LLa75lQ1hVSFz83PAod2HZOSEPvWD jXNiJtaXuf4Vv9Z4n84tOZUcaex8/4bfk6swzIT2hvhUg9u3kH1WO/Uo mjCq8Q==",
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            ],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "140.115.0.251"
        ],
        "ipv6": [
            "2001:288:3001::251"
        ]
    },
    "mail": {
        "spf": "v=spf1 redirect=_spf.ncu.edu.tw",
        "dmarc": "v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com",
        "dkim_selector": "x",
        "dkim_host": "",
        "dkim": "",
        "spf_analysis": {
            "valid": true,
            "lookups": 1,
            "final": "",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "none"
        },
        "bimi": "",
        "mta_sts": "v=STSv1; id=20240806134531",
        "tls_rpt": "v=TLSRPTv1; rua=mailto:center31@cc.ncu.edu.tw"
    },
    "advanced": {
        "ptr": "140-115-0-251.cc.ncu.edu.tw",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "140.115.0.251"
                    ],
                    "time_ms": 970.98
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "140.115.0.251"
                    ],
                    "time_ms": 1135.11
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "140.115.0.251"
                    ],
                    "time_ms": 26.13
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "140.115.0.251"
                    ],
                    "time_ms": 1394.46
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "140.115.0.251"
                    ],
                    "time_ms": 1691.93
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Let's Encrypt",
        "subject": "ncu.edu.tw",
        "valid_from": "2026-06-04T11:12:33-05:00",
        "valid_to": "2026-09-02T11:12:32-05:00",
        "days_remaining": 22,
        "san": [
            "ncu.edu.tw"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://ncu.edu.tw/",
        "status": "HTTP/1.1 200 OK",
        "http_version": "2",
        "headers": {
            "server": "nginx",
            "date": "Tue, 11 Aug 2026 03:44:32 GMT",
            "content-type": "text/html",
            "content-length": "216",
            "last-modified": "Mon, 29 Jun 2020 02:28:14 GMT",
            "connection": "keep-alive",
            "etag": "\"5ef951be-d8\"",
            "accept-ranges": "bytes"
        },
        "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",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://ncu.edu.tw/",
        "title": "",
        "description": "",
        "success": true,
        "error": "",
        "status": 206
    },
    "network": {
        "140.115.0.251": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "mx3.cc.ncu.edu.tw",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 178.2,
                "banner": "",
                "error": "Connection refused"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 4021,
                "banner": "",
                "error": "Connection timed out"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 4210.7,
                "banner": "",
                "error": "Connection timed out"
            }
        ]
    },
    "visitor": {
        "ip": "216.73.217.62",
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