{
    "ok": true,
    "domain": "udacity.com",
    "generated_at": "2026-08-09T02:06:33-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 81,
        "label": "Good",
        "categories": {
            "dns": 60,
            "mail": 90,
            "security": 84,
            "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": "2 MX record(s)."
            },
            {
                "category": "mail",
                "title": "SPF",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0,
                "detail": "SPF policy published."
            },
            {
                "category": "mail",
                "title": "DMARC",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0,
                "detail": "DMARC policy published."
            },
            {
                "category": "mail",
                "title": "DKIM",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "A DKIM selector was verified."
            },
            {
                "category": "mail",
                "title": "MTA-STS",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5,
                "detail": "Mail transport policy."
            },
            {
                "category": "mail",
                "title": "TLS-RPT",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5,
                "detail": "TLS reporting policy."
            },
            {
                "category": "security",
                "title": "Valid TLS certificate",
                "max_points": 55,
                "earned_points": 55,
                "lost_points": 0,
                "detail": "177 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: server-3-166-96-10.mci50.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": "2 MX record(s).",
                "category": "mail",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "SPF",
                "detail": "SPF policy published.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DMARC",
                "detail": "DMARC policy published.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DKIM",
                "detail": "A DKIM selector was verified.",
                "category": "mail",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            },
            {
                "level": "error",
                "title": "MTA-STS",
                "detail": "Mail transport policy.",
                "category": "mail",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
            },
            {
                "level": "error",
                "title": "TLS-RPT",
                "detail": "TLS reporting policy.",
                "category": "mail",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
            },
            {
                "level": "ok",
                "title": "Valid TLS certificate",
                "detail": "177 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: server-3-166-96-10.mci50.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": [
                "3.166.96.10",
                "3.166.96.27",
                "3.166.96.50",
                "3.166.96.103"
            ],
            "AAAA": [],
            "CNAME": [],
            "MX": [
                "10 mxb-00593801.gslb.pphosted.com.",
                "10 mxa-00593801.gslb.pphosted.com."
            ],
            "TXT": [
                "\"cursor-domain-verification-7zn380=ChGiB1Fhp14asve0cCXYyhxFn\"",
                "\"google-site-verification=FJqQiq8r-ExkN9kiVDy44SL2wkm6VS8zka0HUkunGME\"",
                "\"apple-domain-verification=iaobRRgsJ5xUkcuj\"",
                "\"v=spf1 include:_spf.google.com include:sendgrid.net include:mail.zendesk.com include:mktomail.com include:_spf.salesforce.com include:244199112.spf08.hubspotemail.net ip4:205.220.165.99 ip4:205.220.177.99 -all\"",
                "\"atlassian-domain-verification=mBjfUMIIMEpsVsE5wql1jKvzxVpCWKZwpnSWFbY51pnIrp5nSd+8xJn4GKhfHK7j\"",
                "\"facebook-domain-verification=q0sgl66mvrtj3ivlf1s98bn6gxvii2\"",
                "\"atlassian-domain-verification=59aeShSTbEvs7cB33k4Wsvath8fOirTAy79UnAbOloto0AyhJb41hHFK8SGb8zxF\"",
                "\"status-page-domain-verification=y08j3wqb2sw9\"",
                "\"atlassian-sending-domain-verification=4a498916-8f31-4a42-b4ec-758ee24b79e4\""
            ],
            "NS": [
                "ns-1549.awsdns-01.co.uk.",
                "ns-1014.awsdns-62.net.",
                "ns-13.awsdns-01.com.",
                "ns-1109.awsdns-10.org."
            ],
            "SOA": [
                "ns-1549.awsdns-01.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400"
            ],
            "CAA": [],
            "DS": [],
            "DNSKEY": [
                "256 3 13 RWACxFirJUIFSs+zPdC1nWclpcKYIP7OReHBSFqBL7yjINUT9lZz9YJ8 8gD5ruvTMp9nAQEs9XlYz3CxASFJyQ==",
                "256 3 13 TRMG5ywKsL0IwTcq6TKNkr/jgH1QybYBgkAButMscDo2zZOZwcgmYI+H G0VpwpJXsY4rlGlCIDMI1Yq8SnPmyA==",
                "257 3 13 qSxBu+1ou5xBwi250SHT+I/DHFzG9ZV6Yto+LJepvHBnJo6M9AAUa9vQ +IpZ5a9FG/nLHqmFw9K712kgLTvG1Q=="
            ],
            "RRSIG": [
                "NS 13 2 172800 20260811080631 20260809060631 43260 udacity.com. UktuctyVd8frSIpteYOJTJfWjwmzbALzRipsyER+wud2B39dm1vfC2uB mBOiUmz5YK6JeFNu5WODKrrGi3QpAw=="
            ],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "3.166.96.10",
            "3.166.96.27",
            "3.166.96.50",
            "3.166.96.103"
        ],
        "ipv6": []
    },
    "mail": {
        "spf": "v=spf1 include:_spf.google.com include:sendgrid.net include:mail.zendesk.com include:mktomail.com include:_spf.salesforce.com include:244199112.spf08.hubspotemail.net ip4:205.220.165.99 ip4:205.220.177.99 -all",
        "dmarc": "v=DMARC1;p=reject;fo=1;rua=mailto:dmarc_rua@emaildefense.proofpoint.com;ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com",
        "dkim_selector": "google",
        "dkim_host": "google._domainkey.udacity.com",
        "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmu62kxM6GmcYh+T9JVwUEstpwTNUx9I7l3NhjLc6NQeKk3unSlJRM4iGUzjAdqxlPKflYUx2/h0Omw1xtyKNJ1NsvSCHcIIPmHej+Py8Vw/vIECvQq3blgHKX7yfbsQGCs/grPw1W3ZJuGuljn+nY/7+hajro121WFiQeT4rRWERy76yniDMQJjy56pAHGct2eV9RZY80VCXUOQEqai9GXQ27ZbcW5++Jk7Fy5pMT4uiGb531PzVxUbCk6cdhF6Y+aGP6lzJWuTaj0RU7n0CqkdRqrFTgDYyMF4S6BNtxTiTiz6TSqtijjr0eLiK3atlbwk38wSxiiImwVqI68P++QIDAQAB",
        "spf_analysis": {
            "valid": true,
            "lookups": 6,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "reject"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "server-3-166-96-10.mci50.r.cloudfront.net",
        "propagation": {
            "consistent": false,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "52.85.12.127",
                        "52.85.12.41",
                        "52.85.12.54",
                        "52.85.12.93"
                    ],
                    "time_ms": 84.5
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "52.85.12.127",
                        "52.85.12.41",
                        "52.85.12.54",
                        "52.85.12.93"
                    ],
                    "time_ms": 67.43
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "3.166.96.10",
                        "3.166.96.103",
                        "3.166.96.27",
                        "3.166.96.50"
                    ],
                    "time_ms": 118.19
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "52.85.12.127",
                        "52.85.12.41",
                        "52.85.12.54",
                        "52.85.12.93"
                    ],
                    "time_ms": 105
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "3.166.96.10",
                        "3.166.96.103",
                        "3.166.96.27",
                        "3.166.96.50"
                    ],
                    "time_ms": 76.76
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Amazon",
        "subject": "*.udacity.com",
        "valid_from": "2026-07-19T19:00:00-05:00",
        "valid_to": "2027-02-02T17:59:59-06:00",
        "days_remaining": 177,
        "san": [
            "*.udacity.com",
            "udacity.com"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_128_GCM_SHA256"
    },
    "http": {
        "url": "https://www.udacity.com/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "content-length": "0",
            "location": "https://www.udacity.com/",
            "date": "Sun, 09 Aug 2026 07:06:32 GMT",
            "server": "cloudflare",
            "x-cache": "Hit from cloudfront",
            "via": "1.1 db50cf369fe479ad02ec89b3d2484892.cloudfront.net (CloudFront)",
            "x-amz-cf-pop": "ORD58-P13",
            "x-amz-cf-id": "21RWC8h1ShUYEtAfmSMFJaQ0XmwZ0ddL5wA70074l9kbAc086R1FfA==",
            "age": "118631",
            "content-type": "text/html; charset=utf-8",
            "cf-ray": "a284eb32fe60980a-STL",
            "cf-cache-status": "DYNAMIC",
            "cache-control": "s-maxage=31536000, stale-while-revalidate=2592000",
            "x-frame-options": "SAMEORIGIN",
            "x-content-type-options": "nosniff",
            "vary": "Accept-Encoding",
            "content-security-policy": "default-src 'self' 'unsafe-inline' 'unsafe-eval' * blob:;  script-src 'self' 'unsafe-inline' 'unsafe-eval' * blob:; style-src 'self' 'unsafe-inline' * blob:; img-src 'self' data: * blob:; font-src 'self' data: blob: *; connect-src 'self' blob: *; report-uri 'https://csp-reports.udacity.com/report'; report-to udacity-csp-reports",
            "x-amzn-remapped-content-length": "587808",
            "x-amzn-requestid": "aca16818-12bc-4093-b126-7a29fd293247",
            "x-amzn-trace-id": "Root=1-6a765790-6fd561ac26573ffa383278d1;Parent=13afac0dd155234f;Sampled=0;Lineage=1:5d0078c1:0",
            "x-nextjs-cache": "HIT",
            "strict-transport-security": "max-age=31536000; includeSubDomains",
            "set-cookie": "__cf_bm=WCRr0xYvjeQFlOOk0Za_AamAb0kY3Br3Mxq8_gklFVY-1786259192.798657-1.0.1.1-nqN.iJJj7Q7ckupRevpORVYKo0bQka.BIvjNUaR5f_ILvbFYcasUhjehlJpzlEHH0G9081NoWmGLtL.OLS.jPfP7uccwqXiM3OkPuKl6usS5i_RscDT9UriTAc69SDcrAQrBb7IHzeoLgQeG0hnpSg; HttpOnly; SameSite=None; Secure; Path=/; Domain=udacity.com; Expires=Sun, 09 Aug 2026 07:36:32 GMT",
            "reporting-endpoints": "udacity-csp-reports=\"https://csp-reports.udacity.com/report\"",
            "referrer-policy": "strict-origin-when-cross-origin",
            "x-xss-protection": "1; mode=block",
            "alt-svc": "h3=\":443\"; ma=86400"
        },
        "security_checks": {
            "strict-transport-security": true,
            "content-security-policy": true,
            "x-content-type-options": true,
            "x-frame-options": true,
            "referrer-policy": true,
            "permissions-policy": false,
            "cross-origin-opener-policy": false,
            "cross-origin-embedder-policy": false,
            "cross-origin-resource-policy": false
        },
        "server": "cloudflare",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://www.udacity.com/",
        "title": "Learn the Latest Tech Skills; Advance Your Career | Udacity",
        "description": "Learn online and advance your career with courses in programming, data science, artificial intelligence, digital marketing, and more. Gain in-demand technical skills. Join today!",
        "success": true,
        "error": "",
        "status": 200
    },
    "network": {
        "3.166.96.10": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "3.166.96.27": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "3.166.96.50": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "3.166.96.103": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "mxb-00593801.gslb.pphosted.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 29.3,
                "banner": "",
                "error": "Connection refused"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 48.4,
                "banner": "",
                "error": "Connection refused"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 48.7,
                "banner": "",
                "error": "Connection refused"
            }
        ]
    },
    "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": 84.2
}