{
    "ok": true,
    "domain": "cwi.nl",
    "generated_at": "2026-08-08T20:13:54-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 85,
        "label": "Good",
        "categories": {
            "dns": 85,
            "mail": 90,
            "security": 84,
            "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": "4 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": 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": "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": "182 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": 19,
                "lost_points": 16,
                "detail": "5 of 9 evaluated headers detected."
            },
            {
                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "PTR: cwi.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": 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": "4 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": "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": "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": "182 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": "5 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 19,
                "lost_points": 16
            },
            {
                "level": "ok",
                "title": "PTR reverse DNS",
                "detail": "PTR: cwi.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": "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": [
                "192.16.191.48"
            ],
            "AAAA": [],
            "CNAME": [],
            "MX": [
                "10 mx.soverin.net."
            ],
            "TXT": [
                "\"HARICA-SnDN4Irx82qOUXNni8S\"",
                "\"MS=ms63043750\"",
                "\"CWI (Centrum Wiskunde & Informatica)=pnqgTeOiurzbz4yD\"",
                "\"adobe-idp-site-verification=a8667c98581a66df82f18dd9b4ec9ad04d2b0214fda298afa04b69ae89b16b4d\"",
                "\"apple-domain-verification=vKvt2VfbB2WZUhzQ\"",
                "\"Science Park 123, 1098 XG Amsterdam, Netherlands\"",
                "\"ZOOM_verify_QtFtKLPNUTBlqUfH6kXTNZ\"",
                "\"ZOOM_verify_-TwabqfPQI2RrsWzDjTwfQ\"",
                "\"v=spf1 ip4:192.16.191.0/27 ip4:192.174.88.179 ip4:192.174.88.180 ip4:13.58.74.171 include:_spf.surfmailfilter.nl include:projects5.greenlightsolutions.nl include:spf.protection.outlook.com ~all\"",
                "\"Centrum Wiskunde & Informatica\""
            ],
            "NS": [
                "ns1.zurich.surf.net.",
                "ns2.cwi.nl.",
                "dwalin.nikhef.nl.",
                "ns1.cwi.nl."
            ],
            "SOA": [
                "ns1.cwi.nl. hostmaster.cwi.nl. 2026072001 28800 7200 604800 43200"
            ],
            "CAA": [],
            "DS": [
                "56785 8 2 14C2AF77C4F5C1A4DDC95943A215F4FF8BFCA17FF11A351CC2A487F3 DA77F328"
            ],
            "DNSKEY": [
                "256 3 8 AwEAAcqAbiAUl+LRRHQohiLVU6j4eAIdVC3f5nOEr4RitxYiSzimJlz0 0Fk2j7yqwDohGbm1mQ8jN75QWTN1y36klN62oj3GzNFgFAm0AU4UqCqQ AzhH3bO/6KYvQjGxl2C5MYAhlFIQukKT5ZMojbkaDPPMmUeaoRGpmN6v 0Itus9Dd",
                "257 3 8 AwEAAaLgTgDQgiJ3w1AqTwzxPEB+0HSPpw5peFRdLW4Ju6rtdFD1wJTT iGe/yWCHqQk2xuQdiKRNNGXCgM8UlYs2h+zopJHOU/lybzF3fJD2Ur9o SQ+tWGRg0YVmXHXBHXi1Yub6AhpDkEH3XClhRLZeZMdVoCZeB7UVrqaT i2dIoTopPF+hXCQgus+dLJgn/0KYfGYy2Xx2xU99haVY32YrjFeCIQPL UGzd2Y7akzaFhq8wzYEIse5qnefbLmbT+bJq+jQH2vY3E/ste5ATgORG 5SGGKSKG+lC+r7H1mpj88J41by8g0ZkmOJRtN99sR0IcDRq8VH5KHIVo xGHj/IrtQRE="
            ],
            "RRSIG": [
                "DNSKEY 8 2 86400 20260918101538 20260720101538 32073 cwi.nl. p0gJR2ELjBxJRlVceRjrYzrbbg5zbqPF1DHsglE6eJWPeEg5syhI5M8f OwEwFTPHDPBCcYGxldK2yNo7XVTio4o9ttsC2zzQpY0zRBUwEh9KaPyx GdblvutANzcTDJCOAk54cqeyyMW/h4IH07vXlb+loGAs5ikN8+wpg7J7 hKQ=",
                "DNSKEY 8 2 86400 20260918101538 20260720101538 56785 cwi.nl. fM+5MGsaPbZ886qoa/qtjuKOQJq8NdAxeqJoc0Tye/YT+mdSBgF7ROA4 0/tavVAuspdsIpF5Xj0Wnx3RENPAAseNuG4DKuh2QUCdCr4cZExTzNcM 9uL7MdzIyLosJTeyfISyruhcV09cVvKPtH2qKPiOeuUQoLXuQdMowBDy pcrw0LPgps3pl3zz78kV+iZ7VREc+moyq+pUWPklI11U0FEIdY3YTAop PEPLyJWPlPTmo5JB8qseQAif9ag0iaLb2bF1ln9741tTokQYJpG6TkkZ 22B71+oOzgAb4aCxzrvnUECBwKqZeiD1sKO7fwhv4cDmpv42Yr0WK4oh DPy8KA==",
                "TXT 8 2 86400 20260918101538 20260720101538 32073 cwi.nl. LQD2z9qIMrUjfwnAL/U/iuLNgad0jaJ0CTUaWmrigaCIM7qTI4Fiit76 JnE2POkeRAfxyLEkFRwSX7pHvHF97PZYyZtlURGfZBN69tBW6sD/mDBF nFjX19ERvU4IpGcJ5qFJzYztFAPN8pSMd1sqY5z8rye5pXTTrJQxmmjd 7H8=",
                "MX 8 2 300 20260918101538 20260720101538 32073 cwi.nl. YCku8SyjjwvbF2eCuGTHQ3gksspvX3hv0n05BatQ2T1hCTY4SJtwM/WV Z/g7HoxMfG3ESeYdHouu8D/rY3JjII9zh7TJJKwDltfMewPVlEVBnNj2 wf9DFmlTBRilXEfhAdd2i7ccRg+aJd1k1HEmUDaGXTaWP4F/O7oC5/ru k3w=",
                "A 8 2 86400 20260918101538 20260720101538 32073 cwi.nl. RaA6Hh69JeGdF6BQRousvOHr6lpS5jSpLSJzG3hRwNb26Y45uUteufb5 NIiyoTnskqVehaNS+F9+n9TaJqkvzah0sg0gyaF6ZBk/mPPJctshcXwG ywItl5XCq6AhG1JIWgyu81blbccvxfLQ0ps2I1NNs6zHu2icmUkTpgu8 2dU=",
                "NS 8 2 86400 20260918101538 20260720101538 32073 cwi.nl. aXFfU/oEY/86zYlc7G4oxAhP+wWJWCV5xU/dzxTSKgg0svAka1OFcUR7 f29gNbBChTUCAJYyLLI7JmOs/TqWs5ogRIxspZ/wXQMR84v9LgCci4D3 NZUZM97xK4avcU0GlpmvJ0KBVJuYfYKmN5Yc9nbffBr5c3bRKNa6FDX3 C9s=",
                "SOA 8 2 86400 20260918101538 20260720101538 32073 cwi.nl. dQ37UDeZ9IRkV7iC8hAJde7U1nnUGaAEyBl+Nl5saqEuaLy71kxBhY31 6sCQiAhsqUReO9TmQsdZlRvXhFVnVkvhw2IpvEoyhioyEH6Xh9qIbPYm rVJhz6gLuUj1+8Xxd0vzHm9Y0SOmhYUKwbIo9RQsDGTt0pz9HxYWBMzO sQc=",
                "DS 13 2 3600 20260823130833 20260726050723 467 nl. lCBvv84iXVi7emK2ZW9Gq2kLzZPaMZoxXxZet/3Jl+NisLqUSCypawkb GjBxHcPInyVoEZnLdYudzb9Wx2Sr4A==",
                "NSEC3PARAM 8 2 0 20260918101538 20260720101538 32073 cwi.nl. trBhpOYpkuzKPOA3OOtqzOel7b+mmssYtRO9+or0HXdCY4kMGgXM5MMu zW/s+eIkj8XAzlJwK/CJ/jBCk3bNlgbJkxebjItmtbIPDGFfQYt2HrPq XW+0sJE7T/OuIYoV/soSTLg833wK+8tWMwQiWibAuNgz6rJICg9XvnrZ U7A="
            ],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "192.16.191.48"
        ],
        "ipv6": []
    },
    "mail": {
        "spf": "v=spf1 ip4:192.16.191.0/27 ip4:192.174.88.179 ip4:192.174.88.180 ip4:13.58.74.171 include:_spf.surfmailfilter.nl include:projects5.greenlightsolutions.nl include:spf.protection.outlook.com ~all",
        "dmarc": "v=DMARC1;p=quarantine",
        "dkim_selector": "default",
        "dkim_host": "default._domainkey.cwi.nl",
        "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDgFbxWcu/m9TuCvj7xwjZX4s9fWAdi/NIFBUF9vTKQOSt9F/aVGVc6g5/yu+nbilhlMSQaUSbr9chbeTIwmqHmISOqr2svn4zXdRdkY1RWo6BzdDe+xo0FnWxRQpTT7rjO6XmZ8mFeWmwlzgaWDbqHdk9fS7DZi5j1Bnozq1aENQIDAQAB",
        "spf_analysis": {
            "valid": true,
            "lookups": 3,
            "final": "~all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "quarantine"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "cwi.nl",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "192.16.191.48"
                    ],
                    "time_ms": 158.9
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "192.16.191.48"
                    ],
                    "time_ms": 256.41
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "192.16.191.48"
                    ],
                    "time_ms": 175.68
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "192.16.191.48"
                    ],
                    "time_ms": 320.25
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "192.16.191.48"
                    ],
                    "time_ms": 133.74
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Hellenic Academic and Research Institutions CA",
        "subject": "cwi.nl",
        "valid_from": "2026-07-23T06:21:23-05:00",
        "valid_to": "2027-02-07T05:21:22-06:00",
        "days_remaining": 182,
        "san": [
            "cwi.nl",
            "www.cwi.nl"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://www.cwi.nl/en/",
        "status": "HTTP/1.1 200 OK",
        "http_version": "2",
        "headers": {
            "server": "nginx",
            "date": "Sun, 09 Aug 2026 01:13:44 GMT",
            "content-type": "text/html; charset=utf-8",
            "content-length": "81409",
            "connection": "keep-alive",
            "location": "/en/",
            "vary": "Cookie",
            "x-content-type-options": "nosniff",
            "referrer-policy": "same-origin",
            "cross-origin-opener-policy": "same-origin",
            "strict-transport-security": "max-age=63072000",
            "x-xss-protection": "1; mode=block",
            "x-frame-options": "DENY",
            "content-language": "en",
            "set-cookie": "csrftoken=9RI9NBHWF3KKMO0VIDc5OG46MSSLbxtP; expires=Sun, 08 Aug 2027 01:13:44 GMT; Max-Age=31449600; Path=/; SameSite=Lax; Secure"
        },
        "security_checks": {
            "strict-transport-security": true,
            "content-security-policy": false,
            "x-content-type-options": true,
            "x-frame-options": true,
            "referrer-policy": true,
            "permissions-policy": false,
            "cross-origin-opener-policy": true,
            "cross-origin-embedder-policy": false,
            "cross-origin-resource-policy": false
        },
        "server": "nginx",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://www.cwi.nl/en/",
        "title": "Home",
        "description": "",
        "success": true,
        "error": "",
        "status": 200
    },
    "network": {
        "192.16.191.48": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "mx.soverin.net",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 10.1,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 4028.8,
                "banner": "",
                "error": "Connection timed out"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 4021.2,
                "banner": "",
                "error": "Connection timed out"
            }
        ]
    },
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