{
    "ok": true,
    "domain": "csc.edu.cn",
    "generated_at": "2026-08-10T06:22:17-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 33,
        "label": "Critical",
        "categories": {
            "dns": 45,
            "mail": 90,
            "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": "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": 0,
                "lost_points": 10,
                "detail": "Agreement between public resolvers."
            },
            {
                "category": "mail",
                "title": "MX records",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "3 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": 0,
                "lost_points": 55,
                "detail": "No valid certificate was retrieved."
            },
            {
                "category": "security",
                "title": "Certificate lifetime",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10,
                "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": 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",
                "title": "DNS resolution",
                "max_points": 40,
                "earned_points": 0,
                "lost_points": 40,
                "detail": "At least one address family must resolve."
            },
            {
                "category": "availability",
                "title": "HTTP response",
                "max_points": 40,
                "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": "error",
                "title": "IPv4 (A)",
                "detail": "0 IPv4 address(es) detected.",
                "category": "dns",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30
            },
            {
                "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": "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": "error",
                "title": "DNS propagation",
                "detail": "Agreement between public resolvers.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10
            },
            {
                "level": "ok",
                "title": "MX records",
                "detail": "3 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": "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",
                "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": [],
            "AAAA": [],
            "CNAME": [],
            "MX": [
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            ],
            "TXT": [
                "\"v=spf1 include:spf.163.com -all\""
            ],
            "NS": [
                "dns2.csc.edu.cn.",
                "ns2.cernet.net.",
                "dns.csc.edu.cn.",
                "ns3.cernet.net."
            ],
            "SOA": [
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            ],
            "CAA": [],
            "DS": [
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            "DNSKEY": [
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                "256 3 8 AwEAAcWvuXcA1lDWdo6e6Pr57QVuNETZSY7bKku/rykGxqukVw1khygW FE6KMmwzZ23jCh1voUxqgD2dd4Kivxhhhnc/8G/IzESfRnULgjV9vcYY 1ug1QTziwAttrXSz299eakoAtgd08M1lM+i/+df2diMgtQroWa/7snHG DLEsWf2fnWrxvBmB8BihezOlGXUdsCN3ZwoARWpGKFdoioKTmBb6N5mq fwADzPnvY3K+UYBz12mRf4xfRd8ZDcGdQSBReA6XJUEZpOwiIc2wY+oP v5IvgGD3LNmWcJdlVpOGq1OoIX9ckn+QQuL5c0FAe4gYAsGAh4FVx2Gq +U8WueniiRc="
            ],
            "RRSIG": [
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                "SOA 8 3 86400 20260823145848 20260809135848 57793 csc.edu.cn. f/TA4nLx4ivAqclqr0PgD0rgM0xhGMN3SzwMxyxzD9OfgFzIlmIYt4Bn 2VmqKGCa+ZFlvRk/pzvDb24iROYlTny+RsbBHkb1gyJ7hWftIzIjI3SU eD9yyYjDFs7MpQ0dZCSI7snlp0vmY/rB2uMCG8S7OiPaDT1hcePNbqVt GcOKoCfCBKEauoozR/paybUYEkUZdDA10R1hW3sClWIFh5BbS8icgCn5 IQfu+DBhu6UJsuNPg6DcM+23KE0GO3rsQYTQEttgrXiMGZp2WhgtJDW+ bWVOezyr+9fygsL92T7MZGkhJQYpqZuhTJtY0czkWPNW8CJhx1Prfuk+ jHwP+w==",
                "NS 8 3 86400 20260823103348 20260809094921 57793 csc.edu.cn. PHok8Ah04NLh0pR6Ec/WrHBmQsWQh+VIzvcInGdDtn8EqLsBUoFxBXPy hq1sMrs3sxlaHKxbsg5tTuVgDlxPgyv1CxKbvU5pcF0dq8oyeOwxnF5l cdA9seAnt5PV10qNNlXdEAwzT/ppwvhY8duaaRozfYtHES3PaL3GFREK FaeNI+dH2D/fZZv2OXbVw6/iKrElgHXkjqXvQDOnLyMOsUJGo3xloz6o R2v8eVu8qJyLd/Hww2zVFPD/91ReEaAmqmt+YFB0qmGT6v0A1TOk868Z QjHfIQuRDi2EaZQwmL9WCD+OmPg7EqU5fJ34z8M2GLih002mJVN0XkeK RVuU8g==",
                "MX 8 3 86400 20260823103348 20260809094921 57793 csc.edu.cn. PWi6jqKtG0DqRyz02/VVSpsY6E9gWGGrCGUyiVbKMY12a8yZITM9uxKm P7oI0g72LSe+v7sKg1dAXqOigxKtyJ3f3TWAnhhnZrcWGrQ1Pi1JSFAo moGtQln3xyQ9jk7dy/MRnU6Pkva9JCzSmg5Olbk00f6kSDj9CySnKwtO 6wTZc1ITSsLJOuF4eomVdL7lZoNhWrLVN5yxkaLLxP6nbb7RML3v2uZd 21HQAOOud/CZV7cUSgNALaYN8uCIx2Ua6w1D47wbwSMl7n3Ge+5LwTuG 80N3fJD/fsqfLnfaNCueOpx1gh6lZdmUA5UnlHm95rCvc2Pwf+83ldcX WMqGaA==",
                "DS 8 3 172800 20260823051445 20260809042932 44583 edu.cn. dwRmFutyn2Q8A8b5zHPTjfvYLXL6LvKsb87KSZyZFm5p8BcU7+PfLP2I XBpy7OuimeQiDiZARbRkt1BIM9qutT4BSNCCRRWE6n3dzFhjxAp4kZ89 ljgQTNfZ32oiXc6BtGl5AkbK46eoUIwHltBM70EDh+GQ1zKhwH/I0KJk xHkXX0d/zHidjkT5HnNcV+aQukNtP/d1PbAMEk8T0a4Xc9EBxkR6BtPP Zhsq7ELt78qd628FWCFVwrM2SKJM8BzEolct6qi/nj6Sb0kiRtHvYSo1 B/RKTC0fNxAX4ETo4btBuYSyIVBvxr8s6omLBlgC/Og8QLH2+sl8bKvZ YVnFzw=="
            ],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [],
        "ipv6": []
    },
    "mail": {
        "spf": "v=spf1 include:spf.163.com -all",
        "dmarc": "v=DMARC1; p=none; fo=1; ruf=mailto:dmarc@qiye.163.com; rua=mailto:dmarc_report@qiye.163.com",
        "dkim_selector": "default",
        "dkim_host": "default._domainkey.csc.edu.cn",
        "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqWVY1cMmNfX9ikrC5sF6AYWWBQpSodH7XMRRgZ8UqlHeCPeEz2+VTQu5NM9lM/1AhVXYJJQazCeaFueyCgrWwTrfcqFy5TC1/aepXjW5OLENiccgssHKPuZ6PFUuKxg/BybIC9PQbvUcFaaZWD9zyr8kWdBVa1THxWjufDj/AJmGlBKKVMvO1YhkEK6vCFEM2w+hEQtmFc6ZbuLB5NE5r9drwt1x82gqsbY3PYajMb1PbbZgfQqO8ix+lVvADKUgfh5Ck9TsBccU9iOgv0HoL4F2ZlbRyXoliYHCqUB2iwWEIxaRqCs5/F+/PEpjggUugDOnndMbbYxemli8j1TjvQIDAQAB",
        "spf_analysis": {
            "valid": true,
            "lookups": 1,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "none"
        },
        "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": 381.55
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                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [],
                    "time_ms": 46.2
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                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [],
                    "time_ms": 827.44
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                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [],
                    "time_ms": 2448.82
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                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [],
                    "time_ms": 1814.23
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            ]
        }
    },
    "ssl": {
        "available": false,
        "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://csc.edu.cn/",
        "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://csc.edu.cn/",
        "title": "",
        "description": "",
        "success": false,
        "error": "Could not resolve host: csc.edu.cn"
    },
    "network": [],
    "smtp": {
        "host": "out",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 2.9,
                "banner": "",
                "error": "php_network_getaddresses: getaddrinfo failed: Name or service not known"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 1.3,
                "banner": "",
                "error": "php_network_getaddresses: getaddrinfo failed: Name or service not known"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 1.2,
                "banner": "",
                "error": "php_network_getaddresses: getaddrinfo failed: Name or service not known"
            }
        ]
    },
    "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": 77.87
}