{ "ok": true, "domain": "rthk.hk", "generated_at": "2026-08-10T12:12:48-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 79, "label": "Good", "categories": { "dns": 70, "mail": 90, "security": 73, "network": 50, "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": "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": 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": "117 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": 8, "lost_points": 27, "detail": "2 of 9 evaluated headers detected." }, { "category": "network", "title": "PTR reverse DNS", "max_points": 30, "earned_points": 30, "lost_points": 0, "detail": "PTR: www.nexusguard.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": 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/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": "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": "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": "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": "117 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": "2 of 9 evaluated headers detected.", "category": "security", "max_points": 35, "earned_points": 8, "lost_points": 27 }, { "level": "ok", "title": "PTR reverse DNS", "detail": "PTR: www.nexusguard.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": "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/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": [ "27.126.236.160" ], "AAAA": [], "CNAME": [], "MX": [ "10 ga1.rthk.hk.", "20 ga2.rthk.hk." ], "TXT": [ "\"v=spf1 a:mail01.rthk.hk a:smtpi.rthk.org.hk a:nmu.rthk.hk a:cibs.rthk.hk include:spf-1.rthk.hk ~all\"", "\"google-site-verification=lswhwBnwiVjabHq292VitXtNBfWhlfn3c76Bf8HU3X8\"", "\"google-site-verification=VNk68ifg5rgV8UTKG2GF3Daio4UHwDnySuBn6zmL1GE\"", "\"google-site-verification=5p4ysILNNraMVk8d_o0zXtnWpugNBNZW2GlRanwMjsc\"", "\"amazonses:YROv4k+9UrbWwqWDDWvpgHWVDcIUkoDURDROm7Qh3G0=\"" ], "NS": [ "ns03.scig.gov.hk.", "ns01.scig.gov.hk.", "ns02.scig.gov.hk." ], "SOA": [ "ns01.scig.gov.hk. hostmaster.cis.gov.hk. 2026081002 1200 120 15552000 3600" ], "CAA": [], "DS": [], "DNSKEY": [ "256 3 8 AwEAAclJVJjDD0EzP64n3XRHPrUtsK4qAoLMo0FFkDinIJg6lw1kNxuj PQ7BNM/qZMqxN3GFb8Q2oJDc2bYaJz/693LN6ZlEK2qq28gltWeSFMEQ VzFaQZxg7sQwB6ebEaSZgYMewCKCimc/erDAcvinPNJ9WYHmH6lWeMkx H97LG8aGpm9XsuUbPoeQANBwi8yz22g6PnfzQfaU4MhQ5xvJTzPt44fB jqBBniMBKUltIArjCyOmXWYawcC4hF0Y3pwqToyF0IaINmLZLly7vnML 4spC20BLhQNWnon+kwBSw9QS+3j+IdRbmXma/KVnVg7qY3uxaLv9z9dg PP/9jVFL10c=", "257 3 8 AwEAAb7ky6UawUoj66+1GacWf67a4hhdaSrsemkvgakQ5XMW8DRjPJg+ qJwaSSUBOILKY9bjSHuaGetGREThmUegLsPIH9igJrleIh0D1xfuvQey 3vdS25qxl27NeFhWR4rr044g/RFjmVPxpZePRvd7jz5AcqbZhBi8xYCu rxFBczJCAXbgwPci2xl7y2KhO/9w2HHhBQ8rhwQ8FVowW7kDe1mWzN+1 5RZ0tY3rJosDtaEjbC1YhYPQq7zryyly7Yzmbg9I20116BlXacK3zfua tXwrBwYRlGbS7OEqB88hRoduc+nIaKG1jCJD1/CN1dQEZwCY/5I99Y9L HDFPN7Qa3hE=" ], "RRSIG": [ "NS 8 2 300 20260909041550 20260810031550 19161 rthk.hk. rb7qkTeArKIx/bOevt/hc4GHPE1A3vigOoAnAL/NGhqGwbASJZ7FmsC7 /Olm4XpfBGN0+KPPO2x/I4Dc+0EL6rXlPQ+89vJsUlsKCgn6pJ4OBSmR 34R0brFrwSfWdHlfWLemrizj18ru4M6g+Q8glbp9Ek8Dgxcm+bf+Crk8 OT8PR5sR+qw89/iVlQkzr/IxtUVMYN9LNx9e8f2OeELP49hHRaUjxTu5 hFRQcmAWF9EyKbt2wYkSLxBdUDkViLMgV+w6n3oWTiyHKTYUt6cyVT1W LUwiMVxMYqj5nhMnoHkCKYzLXzDENI6gItyZ1VUUIm5TQ0DefuDF3wRQ Ix6wvQ==", "TXT 8 2 300 20260909024102 20260810014102 19161 rthk.hk. DGlivBc7WniNWsQxeOo7tLCEpwKO/1d9LP1sHRIYo047YyMK508GFYmp lq58rDnIgXuIAh5dpnkama9+fPHDKuNaIOR1JHpLr0VjcsgoB5lIAXDP +4rOe59Fw24L4B0XLs+sfsVrjLF5hAZ2xcuoPa3mwvOiuyRPr+L0Ozic Xl2uLjT+S7QqTfILtA9JRu2J6jH9H/ufytRznrOv+JLldCUDje4zy5JO SrZ4rbnQAIs5noC7msJi6ShYFbAjw6recHnmia/GZEksLX6kX4hIlWEJ qBIVPkPA29KziYJTkGMYbD5mspyuhB1PINRHoDCUxYY13gV17VRwvS7L VpkhXQ==" ], "NSEC": [], "NSEC3": [], "SRV": [], "NAPTR": [], "TLSA": [], "SSHFP": [] }, "ipv4": [ "27.126.236.160" ], "ipv6": [] }, "mail": { "spf": "v=spf1 a:mail01.rthk.hk a:smtpi.rthk.org.hk a:nmu.rthk.hk a:cibs.rthk.hk include:spf-1.rthk.hk ~all", "dmarc": "v=DMARC1; p=quarantine; rua=mailto:dmarc-report@rthk.hk", "dkim_selector": "default", "dkim_host": "default._domainkey.rthk.hk", "dkim": "v=DKIM1; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC5OhfFGTIC10YMotrt/BW4wsnK+LYbhYhzmnrr0j3TJhHNuf9pPqX+/nd04P10KVn+snIMFbte9vcRTOxozHuGhl1V00vfVVds4yXpj+j84TwXdRMROCjBwo3O3hA4H5pBJ1FOMqXHyW/TGX0eQDGPGBL72ke7IZxQUzRRuh0T/QIDAQAB;", "spf_analysis": { "valid": true, "lookups": 5, "final": "~all", "message": "Within the estimated limit" }, "dmarc_analysis": { "valid": true, "policy": "quarantine" }, "bimi": "", "mta_sts": "", "tls_rpt": "" }, "advanced": { "ptr": "www.nexusguard.com", "propagation": { "consistent": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "27.126.236.160" ], "time_ms": 71.77 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "27.126.236.160" ], "time_ms": 73.69 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "27.126.236.160" ], "time_ms": 40.75 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "27.126.236.160" ], "time_ms": 54.02 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "27.126.236.160" ], "time_ms": 1231.85 } ] } }, "ssl": { "available": true, "issuer": "Hongkong Post", "subject": "*.rthk.hk", "valid_from": "2026-05-21T02:49:03-05:00", "valid_to": "2026-12-06T01:49:02-06:00", "days_remaining": 117, "san": [ "*.rthk.hk", "rthk.hk" ], "protocol": "TLSv1.3", "cipher": "TLS_AES_256_GCM_SHA384" }, "http": { "url": "https://www.rthk.hk/", "status": "HTTP/1.1 200 OK", "http_version": "2", "headers": { "server": "2.0.0", "date": "Mon, 10 Aug 2026 17:12:38 GMT", "content-type": "text/html; charset=UTF-8", "set-cookie": "lang=zh-hant; expires=Tue, 10 Aug 2027 23:01:24 GMT; Max-Age=31556926; path=/; SameSite=Lax", "location": "https://www.rthk.hk/", "x-nxg": "469956269", "age": "0", "cache-stat": "MISS", "strict-transport-security": "max-age=31536000; includeSubDomains", "expires": "Thu, 19 Nov 1981 08:52:00 GMT", "cache-control": "no-store, no-cache, must-revalidate", "pragma": "no-cache", "x-frame-options": "SAMEORIGIN", "access-control-allow-credentials": "true" }, "security_checks": { "strict-transport-security": true, "content-security-policy": false, "x-content-type-options": false, "x-frame-options": true, "referrer-policy": false, "permissions-policy": false, "cross-origin-opener-policy": false, "cross-origin-embedder-policy": false, "cross-origin-resource-policy": false }, "server": "2.0.0", "powered_by": "" }, "webpage": { "url": "https://www.rthk.hk/", "title": "香港電台網站", "description": "RTHK website", "success": true, "error": "", "status": 200 }, "network": { "27.126.236.160": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "ga1.rthk.hk", "ports": [ { "port": 25, "open": false, "time_ms": 8.2, "banner": "", "error": "Connection refused" }, { "port": 465, "open": false, "time_ms": 4023.6, "banner": "", "error": "Connection timed out" }, { "port": 587, "open": false, "time_ms": 4021, "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": 115.26 }