{
    "ok": true,
    "domain": "utwente.nl",
    "generated_at": "2026-08-09T00:05:50-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 91,
        "label": "Excellent",
        "categories": {
            "dns": 100,
            "mail": 90,
            "security": 77,
            "network": 85,
            "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": 10,
                "lost_points": 0,
                "detail": "1 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": "152 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": 12,
                "lost_points": 23,
                "detail": "3 of 9 evaluated headers detected."
            },
            {
                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "PTR: linux887.utsp.utwente.nl"
            },
            {
                "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": 35,
                "lost_points": 0,
                "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": "ok",
                "title": "IPv6 (AAAA)",
                "detail": "1 IPv6 address(es) detected.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "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": "152 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": "3 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 12,
                "lost_points": 23
            },
            {
                "level": "ok",
                "title": "PTR reverse DNS",
                "detail": "PTR: linux887.utsp.utwente.nl",
                "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": "ok",
                "title": "IPv6 connectivity",
                "detail": "AAAA availability.",
                "category": "network",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0
            },
            {
                "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": [
                "130.89.12.12"
            ],
            "AAAA": [
                "2001:67c:2564:a429::1:3"
            ],
            "CNAME": [],
            "MX": [
                "10 utwente-nl.mail.protection.outlook.com."
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            "TXT": [
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                "\"zoom=7028454\"",
                "\"atlassian-domain-verification=xp1mabSduKWq9tjJUyknw1zcvZPybL5NINb3aVBWFOLsPjqRXHBxu1C/OYO5pZws\"",
                "\"google-site-verification=PgdRqkGsaQx528wE-tmmMPjyDyDr1-0Vh6cqnNcodCs\"",
                "\"jamf-site-verification=MLXEZVYv2Br3Ijb9khXZUg\"",
                "\"1JOvDu30lTiTvWtC3iF9D8zs+IKjCWUq6i6LFch8630FBRBvpcS5e90hIXNNoDIqPiyVvmjiwIbHDorIDlts1Q==\"",
                "\"v=spf1 mx a:smtppool.utwente.nl ip4:52.17.45.98 ip4:52.16.190.81 ip4:54.229.2.165 ip4:52.30.130.201 ip4:34.252.12.130 ip4:52.30.8.165 a:edgepool.ad.utwente.nl include:spf.protection.outlook.com ip4:159.183.231.20 -all\"",
                "\"HARICA-hnFHSkoSdDb6unc2MPW\"",
                "\"MS=ms81740447\"",
                "\"jetbrains-domain-verification=dhhwkvidedf2d3pw0fh8su5n4\"",
                "\"anthropic-domain-verification-9kcwbj=PZwKFnqFonm94a99f5AWzhFzb\"",
                "\"apple-domain-verification=9EPP8F0catSA9f0O\""
            ],
            "NS": [
                "ns3.utwente.nl.",
                "ns1.utwente.nl.",
                "ns2.utwente.nl."
            ],
            "SOA": [
                "ns1.utwente.nl. dnsmaster.utwente.nl. 2181019776 28800 7200 604800 1200"
            ],
            "CAA": [
                "0 issuemail \"harica.gr\"",
                "0 iodef \"mailto:scs-ra@utwente.nl\"",
                "0 issue \"harica.gr\"",
                "0 issue \"letsencrypt.org\""
            ],
            "DS": [
                "17944 8 2 71EB8E95E40378E15C6A5E074D969CE34115FF739FFBC4B361063A51 62AF485B"
            ],
            "DNSKEY": [
                "256 3 8 AwEAAcXzLGr4b/5DvUWuo+OgKCb8PF04z5mlVQorkV8g2fMwmpRIjnwL WWhdX1ciRi/7/+JoJ9Jt+NR4WKn6QBhoRkC7mtj+JS91k6b2/mJ8nIri mDxXvrKwv8cdWBt8Cv2k2svw8sat428rcOakdNy+AQkCAHuaOeCi50u3 swkxJBwr",
                "256 3 8 AwEAAcxDHB8ZAYNfycs0oxyjy/4MjVmCmNKcSqf8CoNw8bkUPcjLgNdH pP2rDnzL+vbJ+UQzhNowoashhVdOPTWQ+2+algdl93Q9ct8kODc0VwVB N2uyclaRvlzRNM7Kar2rCq0rkT5sBa8r9IOBvAfZFqRuwPDgSOJ/UtEi jjorkzEr",
                "257 3 8 AwEAAcQ/PSNhf9ObPYjAK0RKx76I7cZTCAYzTjzdgmebjmEwLBBmKJHd juED4MC2X16fYcdfZfOL0FKRqKAHBTpXS4SnrzHd//ZiP77Uzm56r1Hj WURHBM/lPk43q/7VESrfSoi9MQj872w0Gz5wCN4iMi3yOt/BFpi+pwE3 p47PgxitinmecHZ1DPZhG8R6GoPivih5pGr/fXn1SjK/z1DUcONz3FB/ HniB3QvZ8u6SbCGPhWtOXkuQlEDn1VS52uyBexiHXxeP9tx2R67m/4Hc vYMtqJb4N8Ne6hadqdaPxIytoV7mVD1cIJpjBMsb7Vmy4gxgQd0qD9qT zU1Mo1MXW28="
            ],
            "RRSIG": [
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                "SOA 8 2 3600 20260908044702 20260809034702 12285 utwente.nl. h93/InVo1VbDltaGdJ8x+w4f2YDNfTV3K2hqdkQlOnJpjZLyVfMBU7W+ ChUspXAsOjFD+fxMSDCQeGkH2JfFojJRoXv22y344sRPoGvaBFj+kvAD O4waN79USrXJxlQ7x6cxZZZSz7YVRkh6+J85FxBrMMN7oRlGst8sPAIY LLk=",
                "MX 8 2 900 20260818071557 20260719062323 12285 utwente.nl. vNWZjuG8q+XvYiSMHQ0LNMc444HbC+uLA8M15RwDAox1uCUukz4/a/rB dgf0uen1a+uKdgCF8/yUgt4zwpuVWgFaODuvHrMmze/7XOKKv4OxR9h1 pbTf1/tOYvtnVHpMbUynBua9dH1p248PAHTUeVLaOqf6w2pbxMXwdw8r qys=",
                "DS 13 2 3600 20260904075655 20260807060723 467 nl. ZW4gSEywmoZrMrpMeSmedaT4/xqb6jf6HGbqMkf5LaZjwN5X6/dGNErW 0xRntsMNlKI+D7EesBHsqpy9WnnbYw==",
                "CAA 8 2 3600 20260904214718 20260805212147 12285 utwente.nl. XzgIkckm7qgTtJj86oaEcF+JanzmO1L6sP/fMUT7m/Y8o9jQjaNURArV 6L4IpNPTyEwIdnn83B8C3hlDWB2oQhOKLu8AjNAwEZeJB9NODqinifc8 zFgbkr/EwsyypkxE/o6V9Gj2lKkaOSHB8Zdy0ofNayamAfGgQ7qkF8nu 9Rc="
            ],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "130.89.12.12"
        ],
        "ipv6": [
            "2001:67c:2564:a429::1:3"
        ]
    },
    "mail": {
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        "dmarc": "v=DMARC1; p=reject; sp=none; fo=s; ri=3600; rua=mailto:dmarc@utwente.nl; ruf=mailto:dmarc+ruf@utwente.nl",
        "dkim_selector": "selector1",
        "dkim_host": "selector1._domainkey.utwente.nl",
        "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCbLQCLhpBBdtj1SuPB67ioUQtf1fQddAsZnK4rIVBKOZKxdi2KfZQfJX3AUKmq9WncJz0uXKkf2MXhlUIFmdn5PWyBRfQe1OAFEBk97gpd6C9KeaWRiPiynvnLmNbiV4FoJU09e2enZgEY4KJrs9YNw7E5IsCeK8W4lGrwOYYmvQIDAQAB; n=1024,1450239061,1466050261",
        "spf_analysis": {
            "valid": true,
            "lookups": 4,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "reject"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "linux887.utsp.utwente.nl",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "130.89.12.12"
                    ],
                    "time_ms": 43.75
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "130.89.12.12"
                    ],
                    "time_ms": 229.62
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "130.89.12.12"
                    ],
                    "time_ms": 167.29
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "130.89.12.12"
                    ],
                    "time_ms": 148.88
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "130.89.12.12"
                    ],
                    "time_ms": 161.22
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Hellenic Academic and Research Institutions CA",
        "subject": "webhare.utwente.nl",
        "valid_from": "2026-01-08T04:17:33-06:00",
        "valid_to": "2027-01-08T04:17:33-06:00",
        "days_remaining": 152,
        "san": [
            "webhare.utwente.nl",
            "www.utwente.nl",
            "utwente.nl"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://www.utwente.nl/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "server": "nginx",
            "date": "Sun, 09 Aug 2026 05:05:40 GMT",
            "content-type": "text/html; charset=UTF-8",
            "content-length": "78155",
            "strict-transport-security": "max-age=31536000",
            "location": "https://www.utwente.nl/",
            "cache-control": "no-cache",
            "vary": "Accept-Encoding",
            "x-frame-options": "SAMEORIGIN",
            "x-xss-protection": "1; mode=block",
            "content-security-policy": "frame-ancestors 'self' https://webhare.utwente.nl",
            "last-modified": "Fri, 07 Aug 2026 10:28:04 GMT",
            "server-timing": "remoteip;desc=\"209.126.102.143\",",
            "accept-ranges": "bytes"
        },
        "security_checks": {
            "strict-transport-security": true,
            "content-security-policy": true,
            "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": "nginx",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://www.utwente.nl/",
        "title": "Universiteit Twente (UT) | Enschede",
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        "success": true,
        "error": "",
        "status": 206
    },
    "network": {
        "130.89.12.12": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "utwente-nl.mail.protection.outlook.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 24.5,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 4020.6,
                "banner": "",
                "error": "Connection timed out"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 4040.6,
                "banner": "",
                "error": "Connection timed out"
            }
        ]
    },
    "visitor": {
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