{
    "ok": true,
    "domain": "a-star.edu.sg",
    "generated_at": "2026-08-11T05:45:23-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 85,
        "label": "Good",
        "categories": {
            "dns": 90,
            "mail": 90,
            "security": 69,
            "network": 65,
            "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": "3 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": 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": 10,
                "lost_points": 0,
                "detail": "Agreement between public resolvers."
            },
            {
                "category": "mail",
                "title": "MX records",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "1 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": "142 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": 30,
                "lost_points": 0,
                "detail": "PTR: ec2-13-251-180-0.ap-southeast-1.compute.amazonaws.com"
            },
            {
                "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/2 202 "
            },
            {
                "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": "3 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": "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": "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": "1 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": "142 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": "ok",
                "title": "PTR reverse DNS",
                "detail": "PTR: ec2-13-251-180-0.ap-southeast-1.compute.amazonaws.com",
                "category": "network",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0
            },
            {
                "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/2 202 ",
                "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": [
                "13.251.180.0",
                "54.251.88.218",
                "54.151.226.24"
            ],
            "AAAA": [],
            "CNAME": [
                ";; communications error to 69.64.44.20#53: timed out",
                ";; communications error to 69.64.44.50#53: timed out",
                "; <<>> DiG 9.18.39-0ubuntu0.22.04.4-Ubuntu <<>> a-star.edu.sg CNAME +short +time=1 +tries=1",
                ";; global options: +cmd",
                ";; no servers could be reached"
            ],
            "MX": [
                "0 astar-edu-sg0c.mail.protection.outlook.com."
            ],
            "TXT": [
                "\"cu45p2nn9kcb9hs9c1ds34lc98\"",
                "\"fp327p0heoti4tcuimpkn8fu56\"",
                "\"successfactors-site-verification=NjkwNTJiMGFlN2ZkMTE1NmMxNDljOTQwMzI1NmNhNDA2ZTU4ZjJkNDYxNzNmNjJjNjk1NTQ0MzU4OTVkZjQwNg==\"",
                "\"432mqu6ao4neglshgusak9m3t5\"",
                "\"openai-domain-verification=dv-hF4hJeNX3xMbjXuxPRDJ6mim\"",
                "\"v=spf1 include:spf.a-star.edu.sg include:spf.protection.outlook.com a:a-star.edu.sg -all\"",
                "\"8emru3a8p6dqvmnjndmkvnuvvi\"",
                "\"perplexity-ai-domain-verification-8wnwqp=uOHETfHSp0ykaNbj0LQ8gY0SW\"",
                "\"google-site-verification=mMQ3MBwp5SMsi7xsEZzDubDB1hSekhg7f5STch55zeo\"",
                "\"MS=ms39123724\"",
                "\"47rd0ujhf7q51fdpka1t4av0fh\"",
                "\"anthropic-domain-verification-nhfbft=xlXdiZhFLWDDC8sy0HsO77yNp\""
            ],
            "NS": [
                "ns3.a-star.edu.sg.",
                "ns2.a-star.edu.sg.",
                "ns1.a-star.edu.sg."
            ],
            "SOA": [
                "gm-dns.a-star.edu.sg. please_set_email.absolutely.nowhere. 141638 10800 1080 2592000 900"
            ],
            "CAA": [
                ";; communications error to 69.64.44.20#53: timed out"
            ],
            "DS": [
                "59659 8 2 C0431AE982E933C85586F7A60CEE9580D1491D87825519CF2E26FF3A 95350E24"
            ],
            "DNSKEY": [
                "256 3 8 AwEAAcFxPd8X9n9jCjm5A1CP0X2tO5e12HqJE1rVNxRXW8OU8+XYsydI BvoAMXDIfHb4KE9VDIA46aopSmbEXWzof7FhP34p2BGMoC3amDWs4J0l 9xxJTg6AFWplFR1v6dNofkZsany/NCvxLwKRg+82/IIUkLHMlC7xOnEX QiicuwXH",
                "257 3 8 AwEAAeUROO7OyfuXJdfQYjUQtyReLAqyxfs/Atp7EHMpvYdeI4bShYBM NDHSx2M5CkxuEVaZv47fWC5OqY+0L7HjYwx/DjTmtVtcI8Y8EoMXJOdb +6d6+FiOTamDZLJ/j3aw6o1sPB94KOKQjRS6ytC7rzbcPnwc6bBHRu5b XtVYhmBvzX1o6I1K1GMk8hBcnqycJTb+D6OGuybU5uShCAhkTl8CLVFP zf7XtPl5ZuBKICcWK0YGMoF7ASyhxUOunH5Md/QdYo4AqB7UaCS/U8zY noFKefu0zFSAVxtj2nEGWnweYgyDAcgIaNq8YpVnWsRJv9jdjPTBbgcF qYGolQkOoFE=",
                "256 3 8 AwEAAecwexj8PYIdBy5rYTtb2mX+xspARF/PtDeAM0JGh78iQ8LxCLT8 CPJcJZIruncIX/M3jhErXIkXJt5SBg6ItMfZKb+fh7bzP6m2+Z2dBun7 NIA3VPIf8sJ6gfigp6ULJcXKnp4pp8Sek2hfceE8iQEf3Lg95LZ1G3aP Yf78dJJD"
            ],
            "RRSIG": [
                "NS 8 3 28800 20260816021119 20260811014918 26695 a-star.edu.sg. OSmEyayMyr6LH0Mm1ClV7UxwVRO9eT+4GnfZodKpm7J6asmAy/49qGpb QWicDH/Z9E7LdK5Ubx1to8d20ZF1USYUxSWlPWtmjtwPHCX/rI1EKXQr LEzOwPocjq4wUtNp6kOArjRgzqnuQ61UjsuOWXlE/GX+UGica3pjgq1K gJc=",
                "PTR 8 3 300 20260816021119 20260811014918 26695 a-star.edu.sg. GsjN8EBRNCMvsmO8gqz0WGRvHNfiSdruV4DmEKJfAn2dWPWVaGhfBmO3 k7esYbBXI3GMti6x1KnpfAXCOTM+8ry53VuTKcV5/lgaXc46cWMFfFF6 00Wk+94E6RSrxmdR6sNQK9KGHU0P3XtDK2q8UpxnMCpiK38TDKHzJiH9 NlU=",
                "TXT 8 3 3600 20260815103829 20260810101751 26695 a-star.edu.sg. gb0adRoiRVbNroXNKot3eYHv8KpPiOEcYJ/XnqvDq3MQpRjLPQVS8sKA 2l5L8HfGRnAQSuC+81a/2u5f4C8K9OWUH3Op6OcpRao2bzBQ2fI800lJ faWsc7mgVRwVBfKzSCnmTWgrIAOiI0yuhwaTkV/xvBN+0RuiFp0xssfB iJU=",
                "A 8 3 300 20260816082911 20260811082016 26695 a-star.edu.sg. nk5Mi6TwKd1StFInL5cEegwGRmAIysPoh/ueoMfWQgQCmgbyRjO2RyJf 9sTcbaErsGYqWBMclVHSLR087BrG7srYThnmE40uGB4mnIVHI150EHat xZq3T/em445KNs0oMmVJPP4v8Bsy1R3pttZz1pXu7aedEqFsNHbQ8XxV FOQ=",
                "SOA 8 3 28800 20260816104002 20260811094002 26695 a-star.edu.sg. GhSHKD6WTbeXDcG/s0i+efm1bKkHcSsKAKr0y4byPtKTvqGPIwPD37Yy h6iVWQS8jDxcxSwCflVdXly7xTKc/1AttrOuiI3jMe4F1rohaLqz54iQ Wc5YeZPISZO+weFGQax+wlDrkKJAlAjZRzEZo+M23Zj26Z9zN1WAdTv0 PRQ=",
                "DNSKEY 8 3 216000 20260815184323 20260810181110 26695 a-star.edu.sg. qRBKR6HMcxfrDGPANaf7FqHOGG0EOmLTZt5+FLxM4IUaKQwXycjeb643 SGmbDx8wncjKJlnOk8oHX2CKBdEmBzAWLxey9bKo75dFmst3JJeN1hAA 5f86+55dp5LhUhIaaM4Rc6Ei558k9x/4orKhY63tl1x0ZbkdWJ7QG89c QKQ=",
                "DNSKEY 8 3 216000 20260815184323 20260810181110 59659 a-star.edu.sg. rjsx9xx03z7rQmVr9tH9PvUndEp6s/BR0HM0njRzL2d1Rh2AuJ5qSpKN vtPd/h2EIinl+VJWHfTyeWvf9rYbQKvoi8/FjkCG9QG9GrBA5DB3PQhz wTRnWCqzmi3qDQb6wIto6mc0GJyd3TUXYLDfDr4AREhOt+eA4IicV287 O9FSeWgqDr+DqGS38ANB/HqX2JApHM+sFsa7BRDZOsKbvJGVyLUx2351 i/wWJNP5AC1Pz9Ed/qXgYY59MZPH9atl4JjOgMh4mdvnDn9extf0C1VH yxpEwP7mqKnyscp6aFlvWw7wuj5Ag9vN9A7IksGqS4ywsBzI70ak5ztO HcpuGA==",
                "MX 8 3 600 20260816021119 20260811014918 26695 a-star.edu.sg. N2QBK9zornYltj6zUC35QrEykdNKaobiyI7r8rUwrNQTRYmWZmcV1tc9 /ixuaSx2oPCbsnu+3dk2xW0KZjYUEiJAUwYdN3DNxJ00knw7cdPV19b7 5UDwTGzyJXyCDhk2E1U1Ohf3vnhU91NBqQm46+qCdF18of02vD7WyzeA 2Rw=",
                "DS 8 3 3600 20260814170623 20260807130020 48175 edu.sg. DE6sa6Xu0bwbRkqd/Cq8XwnynUhgNsP3VVeOGtxf3TuzwreMAT0BjZXY MU8Z2/FzK1L+fHtjEFUmrHCeOGvotLUl8Uhc3DyZ379CGDFsV95seWgE WfKgeuDMOVlBNPedaZVpulMJP7JLA/fiBa5XqF2VtIBffkB6EQDagfCq nx/g5IycG8z4uG2Ws7kaB3goggbq9UGf+7N1eDZ/IGt6uLkHXhHWJBtz WdidvXUmSlwtWIRm/knrf+6AmIHw8+zQ8km777xGbpx6JPiA4iwzg7IB YmwE0pR+hsD8ZpJnrOgr/Pl+Z4fGgYh9oNZ9On6TEKIwt9JFZwQ35oVj nBNXbQ==",
                "NSEC3PARAM 8 3 900 20260816021119 20260811014918 26695 a-star.edu.sg. tgLgJ5p3CV4ZElGpl5xyH3Rfzx2tSQczpfbmeq+sB6Z7Ns+kzTTtdSO0 gXRgbketXoZmy/Un2/cNpcE6lp6rKAFJu21whBb2PFtVTZYtOV8FV5tD 1acRQcOvX0gzZoF13J1RMA6/XNEwfws7978lFNtWDattMXfdHHI0DTFR 0Bo="
            ],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "13.251.180.0",
            "54.251.88.218",
            "54.151.226.24"
        ],
        "ipv6": []
    },
    "mail": {
        "spf": "v=spf1 include:spf.a-star.edu.sg include:spf.protection.outlook.com a:a-star.edu.sg -all",
        "dmarc": "v=DMARC1; p=reject; pct=100; rua=mailto:dmarc_aggr@hq.a-star.edu.sg; ruf=mailto:dmarc_fail@hq.a-star.edu.sg",
        "dkim_selector": "selector1",
        "dkim_host": "selector1._domainkey.a-star.edu.sg",
        "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA17inL48kYarV6HLm3rlHL7LAPknosT26kBPe5itFdP1aqYu/tfwAIvyDmToCSUh8yMStMplbYrOMtMggwHkQmeDBPJDhWgAizJH5pi9LwcSK0hpFVsJqxCsefMF8q+pmZhrSXXg9MQL3BzqexcyddriR6stbowZMHenENFzFuGPY4Xqh9aMCZNFaMDoGPTxAQCVLY0XTcocdl+tJ4cBT7gmF2hZm/OPeuepG1fSxPK+SfcldLbB5INxtOjI9W5ns1as0vp/pqqlBOnRoYLQ9c+5n4l1PkWtUQP5uFgF4D7mEEtDyoFelhw4HTeo4euSrJPWZ4ZYkSybdMUh9XjtZEQIDAQAB;",
        "spf_analysis": {
            "valid": true,
            "lookups": 3,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "reject"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "ec2-13-251-180-0.ap-southeast-1.compute.amazonaws.com",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "13.251.180.0",
                        "54.151.226.24",
                        "54.251.88.218"
                    ],
                    "time_ms": 255.59
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "13.251.180.0",
                        "54.151.226.24",
                        "54.251.88.218"
                    ],
                    "time_ms": 487.61
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "13.251.180.0",
                        "54.151.226.24",
                        "54.251.88.218"
                    ],
                    "time_ms": 1753.5
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "13.251.180.0",
                        "54.151.226.24",
                        "54.251.88.218"
                    ],
                    "time_ms": 600.79
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
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