{
    "ok": true,
    "domain": "vanderbilt.edu",
    "generated_at": "2026-08-08T21:01:33-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 76,
        "label": "Good",
        "categories": {
            "dns": 60,
            "mail": 90,
            "security": 65,
            "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": "4 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": 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": 0,
                "lost_points": 10,
                "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": "75 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": 0,
                "lost_points": 35,
                "detail": "0 of 9 evaluated headers detected."
            },
            {
                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "PTR: server-18-67-65-116.iad89.r.cloudfront.net"
            },
            {
                "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/2 200 "
            },
            {
                "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": "4 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": "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": "error",
                "title": "DNS propagation",
                "detail": "Agreement between public resolvers.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10
            },
            {
                "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": "75 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": "error",
                "title": "HTTP security headers",
                "detail": "0 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35
            },
            {
                "level": "ok",
                "title": "PTR reverse DNS",
                "detail": "PTR: server-18-67-65-116.iad89.r.cloudfront.net",
                "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/2 200 ",
                "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": [
                "18.67.65.116",
                "18.67.65.60",
                "18.67.65.38",
                "18.67.65.119"
            ],
            "AAAA": [],
            "CNAME": [],
            "MX": [
                "0 vanderbilt-edu.mail.protection.outlook.com."
            ],
            "TXT": [
                "\"docusign=3041bd88-1c88-49c0-8576-3d2885cb672b\"",
                "\"notion-domain-verification=97dE1bHc7XC2FHSsR7KrzXMFu0GSMKquWBIciXaOXMx\"",
                "\"docusign=529f0db5-6560-4a5a-bd99-efb58047d240\"",
                "\"google-site-verification=ZPkskV3bBDvSNlfQT4v7iQztoJzSniLVsXVRNUysWTs\"",
                "\"atlassian-domain-verification=KIrgf7/apONq/bRnIYdJbtFpatSYKDRI9zXQMa5facg4/7C7aQ5nmBlq0/bWJB1R\"",
                "\"v=spf1 mx ip4:129.59.16.3 ip4:129.59.16.4 ip4:129.59.16.5 ip4:129.59.15.240 ip4:129.59.15.241 ip4:129.59.15.242 ip4:129.59.15.243 include:spf.protection.outlook.com ~all\"",
                "\"infoblox-domain-mastery=f0b5ed4094e6987428819256812c9b4e577e8947244eaa8ac44dfa20beacc8dc80\"",
                "\"ZOOM_verify_dr4sLjF8sxm6AcjtNNiMB2\"",
                "\"MS=ms22528399\"",
                "\"jetbrains-domain-verification=3xauz0np24sv6m4ofp6d68mx4\"",
                "\"_v8vb83d1o4uah31sa6cwz1ahxj5v68w\""
            ],
            "NS": [
                "ns4.vanderbilt.edu.",
                "ns1.vanderbilt.edu.",
                "ns2.vanderbilt.edu.",
                "ns3.vanderbilt.edu."
            ],
            "SOA": [
                "ns1.vanderbilt.edu. noc.vanderbilt.edu. 2020122267 10800 3600 2419200 900"
            ],
            "CAA": [],
            "DS": [],
            "DNSKEY": [],
            "RRSIG": [],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "18.67.65.116",
            "18.67.65.60",
            "18.67.65.38",
            "18.67.65.119"
        ],
        "ipv6": []
    },
    "mail": {
        "spf": "v=spf1 mx ip4:129.59.16.3 ip4:129.59.16.4 ip4:129.59.16.5 ip4:129.59.15.240 ip4:129.59.15.241 ip4:129.59.15.242 ip4:129.59.15.243 include:spf.protection.outlook.com ~all",
        "dmarc": "v=DMARC1;p=reject;sp=none;rua=mailto:dopwbtga@ag.dmarcian.com,mailto:dmarc_agg@valigov.email,mailto:dmarcagg@vanderbilt.edu;ruf=mailto:dopwbtga@fr.dmarcian.com;fo=1;",
        "dkim_selector": "selector1",
        "dkim_host": "selector1._domainkey.vanderbilt.edu",
        "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxlu3W9SPx+uN4yXsl7w3V+hF1JiytbkhybIW9QxM/k7ASU/VToCkudU7nnaMzxNold3ttmE02pCCxLsd91kRaxTfVLP+0C8EAGbgb+nuo6drLjP/hgXb8DzV2YNNNR0bAJTf474BLId9FhDM5WYS7hstpdperN0zpq6czYYKljCMA8alVsE0CdofXycUqwmgt6GYCir/BU5yHz0LGyOVLmn6wWvSAyF9CaN6oJ4f+4uRDqqcP78SdutpzT1jEnbCbKddXzb9iEC2kEeTCElBqa6V5c7h3BQ00xRvgbtfqX5ros+YeL/NgnRfxw6uSV86s7e5uA1fqeoy9t76FY6dPQIDAQAB;",
        "spf_analysis": {
            "valid": true,
            "lookups": 2,
            "final": "~all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "reject"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "server-18-67-65-116.iad89.r.cloudfront.net",
        "propagation": {
            "consistent": false,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "54.192.55.109",
                        "54.192.55.125",
                        "54.192.55.127",
                        "54.192.55.61"
                    ],
                    "time_ms": 102.14
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "18.67.65.116",
                        "18.67.65.119",
                        "18.67.65.38",
                        "18.67.65.60"
                    ],
                    "time_ms": 69.98
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "54.192.100.24",
                        "54.192.100.47",
                        "54.192.100.63",
                        "54.192.100.73"
                    ],
                    "time_ms": 93.81
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "18.67.65.116",
                        "18.67.65.119",
                        "18.67.65.38",
                        "18.67.65.60"
                    ],
                    "time_ms": 87.42
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "18.67.65.116",
                        "18.67.65.119",
                        "18.67.65.38",
                        "18.67.65.60"
                    ],
                    "time_ms": 82.46
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Amazon",
        "subject": "vanderbilt.edu",
        "valid_from": "2025-09-24T19:00:00-05:00",
        "valid_to": "2026-10-23T18:59:59-05:00",
        "days_remaining": 75,
        "san": [
            "vanderbilt.edu",
            "*.vanderbilt.edu"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_128_GCM_SHA256"
    },
    "http": {
        "url": "https://www.vanderbilt.edu/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "server": "AmazonS3",
            "date": "Sun, 09 Aug 2026 02:01:25 GMT",
            "content-length": "166672",
            "location": "https://www.vanderbilt.edu/",
            "x-cache": "RefreshHit from cloudfront",
            "via": "1.1 86aa18455c6567be80376569a4bc4cdc.cloudfront.net (CloudFront)",
            "x-amz-cf-pop": "ORD56-P13",
            "x-amz-cf-id": "xQpYD3R_8nTygTzuC0ddy8sVbza8A-1FybAtslLV3YxuMYD3nD_P-g==",
            "content-type": "text/html",
            "x-amz-replication-status": "COMPLETED",
            "last-modified": "Fri, 31 Jul 2026 15:17:13 GMT",
            "x-amz-server-side-encryption": "AES256",
            "x-amz-version-id": "tmHe5lKk8.I_IVnmVqyDIyisVP9IvYRL",
            "accept-ranges": "bytes",
            "etag": "\"9a2bda36f84c735a5732b83cabaa6bb0\""
        },
        "security_checks": {
            "strict-transport-security": false,
            "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": "AmazonS3",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://www.vanderbilt.edu/",
        "title": "Vanderbilt University",
        "description": "Quick Guide Prospective Undergrads Prospective Grad & Professional Current Students Faculty & Staff Job Seekers Alumni & Friends Undergraduate Admissions Financial Aid & Scholarships Academics Find Your Major Schools & Colleges Student Life Plan a Visit Undergraduate Research Athletics - Anchor",
        "success": true,
        "error": "",
        "status": 200
    },
    "network": {
        "18.67.65.116": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "18.67.65.60": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "18.67.65.38": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "18.67.65.119": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "vanderbilt-edu.mail.protection.outlook.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 17.6,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 4016.9,
                "banner": "",
                "error": "Connection timed out"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 4064.5,
                "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": 101.08
}