{
    "ok": true,
    "domain": "doubao.com",
    "generated_at": "2026-08-09T08:32:47-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 65,
        "label": "Fair",
        "categories": {
            "dns": 80,
            "mail": 20,
            "security": 69,
            "network": 35,
            "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": "8 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": "5 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": 5,
                "lost_points": 0,
                "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": 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",
                "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": 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": "162 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": 0,
                "lost_points": 30,
                "detail": "PTR not detected."
            },
            {
                "category": "network",
                "title": "IPv4 diversity",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0,
                "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": "8 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": "5 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": "ok",
                "title": "CAA policy",
                "detail": "Certificate authority restriction.",
                "category": "dns",
                "max_points": 5,
                "earned_points": 5,
                "lost_points": 0
            },
            {
                "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": "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": "ok",
                "title": "Valid TLS certificate",
                "detail": "162 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": "error",
                "title": "PTR reverse DNS",
                "detail": "PTR not detected.",
                "category": "network",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30
            },
            {
                "level": "ok",
                "title": "IPv4 diversity",
                "detail": "Two or more IPv4 addresses receive full points.",
                "category": "network",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0
            },
            {
                "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": {
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                "163.181.246.195",
                "163.181.246.191",
                "163.181.246.194",
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                "163.181.246.192",
                "163.181.246.189",
                "163.181.246.193",
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                "doubao.com.c.dsa.cdnbuild.net.",
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            "CNAME": [
                "doubao.com.bytedns1.com."
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            "MX": [
                "doubao.com.bytedns1.com.",
                "doubao.com.c.dsa.cdnbuild.net.",
                "l7-online-self-max.s.dsa.cdnbuild.net."
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            "TXT": [
                "doubao.com.bytedns1.com.",
                "doubao.com.c.dsa.cdnbuild.net.",
                "l7-online-self-max.s.dsa.cdnbuild.net."
            ],
            "NS": [
                "ns-mobile.bytedns.com.",
                "ns2.bytedns.com.",
                "ns-telecom.bytedns.com.",
                "ns-unicom.bytedns.com.",
                "ns1.bytedns.com."
            ],
            "SOA": [
                "doubao.com.bytedns1.com.",
                "doubao.com.c.dsa.cdnbuild.net.",
                "l7-online-self-max.s.dsa.cdnbuild.net."
            ],
            "CAA": [
                "doubao.com.bytedns1.com.",
                "doubao.com.230b2a2545cfa773.queniuck.com."
            ],
            "DS": [
                "doubao.com.bytedns1.com.",
                "doubao.com.230b2a2545cfa773.queniuck.com."
            ],
            "DNSKEY": [
                "doubao.com.bytedns1.com.",
                "doubao.com.230b2a2545cfa773.queniuck.com."
            ],
            "RRSIG": [
                ";; communications error to 69.64.44.20#53: timed out"
            ],
            "NSEC": [
                ";; communications error to 69.64.44.20#53: timed out",
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            ],
            "NSEC3": [
                "doubao.com.bytedns1.com.",
                "doubao.com.230b2a2545cfa773.queniuck.com."
            ],
            "SRV": [
                "doubao.com.bytedns1.com.",
                "doubao.com.230b2a2545cfa773.queniuck.com.",
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                "95 1 443 163.181.246.191.",
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                "95 1 443 163.181.246.192.",
                "95 1 443 163.181.246.188.",
                "95 1 443 163.181.246.195.",
                "95 1 443 163.181.246.189.",
                "95 1 443 163.181.246.194.",
                "95 1 443 163.181.246.190."
            ],
            "NAPTR": [
                "doubao.com.bytedns1.com.",
                "doubao.com.c.dsa.cdnbuild.net.",
                "l7-online-self-max.s.dsa.cdnbuild.net."
            ],
            "TLSA": [
                "doubao.com.bytedns1.com.",
                "doubao.com.230b2a2545cfa773.queniuck.com."
            ],
            "SSHFP": [
                "doubao.com.bytedns1.com.",
                "doubao.com.230b2a2545cfa773.queniuck.com."
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        },
        "ipv4": [
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        "ipv6": []
    },
    "mail": {
        "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": [
                        "155.102.176.81",
                        "155.102.176.82",
                        "155.102.176.83",
                        "155.102.176.84",
                        "155.102.176.85",
                        "155.102.176.86",
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                    "time_ms": 439.87
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
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                    "time_ms": 730.76
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
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                    "time_ms": 1811.52
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
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                    "time_ms": 1022.49
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                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
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                    "time_ms": 1496.35
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            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "DigiCert Inc",
        "subject": "*.doubao.com",
        "valid_from": "2026-01-18T18:00:00-06:00",
        "valid_to": "2027-01-18T17:59:59-06:00",
        "days_remaining": 162,
        "san": [
            "*.doubao.com",
            "doubao.com"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://www.doubao.com/chat/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "server": "volc-dcdn",
            "content-type": "text/html; charset=UTF-8",
            "content-length": "136",
            "location": "https://www.doubao.com/chat/",
            "date": "Sun, 09 Aug 2026 13:32:36 GMT",
            "proxy-status": "0000201302026000",
            "x-tt-trace-host": "01d8664ad8694ae4e9dad87f6f255ded46a883bdfe4e0331bbc4cb026296832da9480632c1ade365f6479f954433e90ce5f4b85570a3a84d203bd57c11ad85cc5227472074a8e6908cde3c773bd76e0c956dd2ca60f43a04b64abc6a98038f317b1215c64d8a6d6f6ad4ab7bcadbd1993d1ee931d2a109329cb755aacac393d42e7caca690cb90df2235e52f8c2b57157a",
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            "x-tt-logid": "2026080921323692B57FB2495655829784",
            "x-tt-timestamp": "1786282356.712",
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            "vary": "Accept-Encoding",
            "cache-control": "no-cache",
            "content-security-policy": "report-to slardar-endpoint; upgrade-insecure-requests ; report-uri https://mon.zijieapi.com/monitor_browser/collect/batch/security/?bid=flow_web;",
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            "document-policy": "include-js-call-stacks-in-crash-reports",
            "x-bytefaas-enable-stream": "true",
            "x-bytefaas-execution-duration": "599.42",
            "x-bytefaas-request-id": "2026080921323692B57FB2495655829784",
            "x-gw-dst-psm": "goofy_ssr.cn.3155598",
            "x-modernjs-render": "server",
            "x-powered-by": "Goofy Node",
            "x-processed-by": "Modern.js",
            "set-cookie": "ttwid=1%7Cptbo_5evHJDzhK1sEzhGvoyFADEqp6tRMjk5OVtiUHw%7C1786282356%7C872f98a2b2076dac0885c4b1b8093a1b5f60fdfe32012d5477f9a95d68c94164; Max-Age=31104000; Domain=.doubao.com; Path=/; HttpOnly; Secure; SameSite=None"
        },
        "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": "volc-dcdn",
        "powered_by": "Goofy Node"
    },
    "webpage": {
        "url": "https://www.doubao.com/chat/",
        "title": "豆包 - 字节跳动旗下 AI 智能助手",
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        "error": "",
        "status": 200
    },
    "network": {
        "163.181.246.195": {
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