{ "ok": true, "domain": "segmentfault.com", "generated_at": "2026-08-09T10:55:13-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 75, "label": "Good", "categories": { "dns": 70, "mail": 90, "security": 69, "network": 20, "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": 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": "2 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": 0, "lost_points": 15, "detail": "Both DS and DNSKEY are required." }, { "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": 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": "87 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": 20, "lost_points": 15, "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": "1 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": "2 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": "error", "title": "DNSSEC chain", "detail": "Both DS and DNSKEY are required.", "category": "dns", "max_points": 15, "earned_points": 0, "lost_points": 15 }, { "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": "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": "87 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": "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": "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": { "records": { "A": [ "8.152.202.66" ], "AAAA": [], "CNAME": [], "MX": [ "5 hzmx01.mxmail.netease.com.", "10 hzmx02.mxmail.netease.com." ], "TXT": [ "\"verification-code-site-App_feishu=b3dyZq69cmo9duLi2JG4.\"", "\"verification-code-site-App_feishu=0fo2Fzmg9rNKrduJxNdm\"", "\"MS=1DB32B475AC8829DFD0271BC986A4A44CB65CDA8\"", "\"v=spf1 include:spf.163.com -all\"" ], "NS": [ "ns4.dnsv3.com.", "ns3.dnsv3.com." ], "SOA": [ "ns3.dnsv3.com. enterprise1dnsadmin.dnspod.com. 1786240832 3600 180 1209600 180" ], "CAA": [], "DS": [], "DNSKEY": [], "RRSIG": [], "NSEC": [ "\\000.segmentfault.com. A NS SOA MX TXT AAAA SRV RRSIG NSEC DNSKEY SVCB HTTPS CAA" ], "NSEC3": [], "SRV": [], "NAPTR": [], "TLSA": [], "SSHFP": [] }, "ipv4": [ "8.152.202.66" ], "ipv6": [] }, "mail": { "spf": "v=spf1 include:spf.163.com -all", "dmarc": "v=DMARC1; p=quarantine; fo=1; ruf=mailto:dmarc@qiye.163.com; rua=mailto:dmarc_report@qiye.163.com", "dkim_selector": "default", "dkim_host": "default._domainkey.segmentfault.com", "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzvQrg/3t8VivxIj7HqYGAn3l5u1UOA/wLVBVauXPQ/Vt7Q3wC8zJC8fmcRPH9y7pFJwNB/OJ+BSFg92hz50Yhj8NAwZxzn2YR4TYzRd0fbIMA2wiMtQIq2N0quaBwrNQ9U8BE7Zx0TMjzvtIDtSLRhFvukU8WrjXubByXV7rKn5OvWUvas79p2dT+ayuAtOlF8qkXiMSgKbo4wbNOm5v2SrcEVjwIDEHXnklYrh7rpr29/mCfR9dW0yaxHxFnbbXQH95UfySpepJ233MBmY+iJhtgR7zANGwOo8RTyVQ+olAs1LNJwhahMSGgLRj2uqjBdjpNqd91G3YUZxsXdyN8QIDAQAB", "spf_analysis": { "valid": true, "lookups": 1, "final": "-all", "message": "Within the estimated limit" }, "dmarc_analysis": { "valid": true, "policy": "quarantine" }, "bimi": "", "mta_sts": "", "tls_rpt": "" }, "advanced": { "ptr": "", "propagation": { "consistent": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "8.152.202.66" ], "time_ms": 68.85 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "8.152.202.66" ], "time_ms": 374.83 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "8.152.202.66" ], "time_ms": 82.44 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "8.152.202.66" ], "time_ms": 214.09 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "8.152.202.66" ], "time_ms": 99.15 } ] } }, "ssl": { "available": true, "issuer": "Let's Encrypt", "subject": "segmentfault.com", "valid_from": "2026-08-06T11:32:00-05:00", "valid_to": "2026-11-04T10:31:59-06:00", "days_remaining": 87, "san": [ "segmentfault.com", "sponsor.segmentfault.com" ], "protocol": "TLSv1.3", "cipher": "TLS_AES_256_GCM_SHA384" }, "http": { "url": "https://segmentfault.com/", "status": "HTTP/2 200 ", "http_version": "3", "headers": { "server": "Tengine", "date": "Sun, 09 Aug 2026 15:55:04 GMT", "content-type": "text/html; charset=utf-8", "content-length": "131894", "set-cookie": "sl-session=xH49Nlj0eWoTQYaYiwGWaA==; SameSite=None; Secure; Path=/; Max-Age=86400; HttpOnly", "cache-control": "private, no-cache, no-store, max-age=0, must-revalidate", "etag": "\"uyirntx8mu2ozh\"", "vary": "Accept-Encoding", "x-hit": "web-misc", "strict-transport-security": "max-age=15768000;" }, "security_checks": { "strict-transport-security": true, "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": "Tengine", "powered_by": "" }, "webpage": { "url": "https://segmentfault.com/", "title": "SegmentFault 思否", "description": "SegmentFault 思否是中国专业的开发者技术社区。我们以技术问答、技术博客、技术课程、技术资讯为核心的产品形态，为开发者提供纯粹、高质的技术交流平台。", "success": true, "error": "", "status": 200 }, "network": { "8.152.202.66": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "hzmx01.mxmail.netease.com", "ports": [ { "port": 25, "open": false, "time_ms": 1.1, "banner": "", "error": "Connection refused" }, { "port": 465, "open": false, "time_ms": 28.3, "banner": "", "error": "No connection" }, { "port": 587, "open": false, "time_ms": 27.8, "banner": "220 entmail-hzmx2-aliyun.singapore.163.org ESMTP ready", "error": "No connection" } ] }, "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": 83.47 }