{
    "ok": true,
    "domain": "uni-stuttgart.de",
    "generated_at": "2026-08-09T01:28:10-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 87,
        "label": "Good",
        "categories": {
            "dns": 95,
            "mail": 65,
            "security": 84,
            "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": 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": "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": 0,
                "lost_points": 25,
                "detail": "DMARC policy not found."
            },
            {
                "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": "93 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: uni-stuttgart.de"
            },
            {
                "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": "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": "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": "error",
                "title": "DMARC",
                "detail": "DMARC policy not found.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 0,
                "lost_points": 25
            },
            {
                "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": "93 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: uni-stuttgart.de",
                "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": [
                "129.69.0.47"
            ],
            "AAAA": [
                "2001:7c0:2041:48::47"
            ],
            "CNAME": [],
            "MX": [
                "10 mxex2.tik.uni-stuttgart.de.",
                "10 mxex1.tik.uni-stuttgart.de."
            ],
            "TXT": [
                "\"v=spf1 include:_spf.mxex.uni-stuttgart.de include:_spf.mailrelay.uni-stuttgart.de\"",
                "\"adobe-idp-site-verification=89e0898d92cb1af1264a5095a1ec46b6c591d4af17b8881af3e833ef42b33814\"",
                "\"atlassian-domain-verification=mw1Y7z/KOJZxm0aAkF8bQwT1rT1x6RBD8fj3bBciJVtq1jDX97u/Jkgk7mxstpBf\"",
                "\"google-site-verification=H44ewdpwEWItGRRimCVxcR_ecOlVXvOgXeKE9RgM2ts\"",
                "\"security_contact=noc@uni-stuttgart.de\"",
                "\"HARICA-nUcytuSG6DImGKcrieG\"",
                "\"University of Stuttgart\"",
                "\"MS=D72A25682508B3822D00441FBB6C7A2A083F0400\""
            ],
            "NS": [
                "dns-auth1.uni-stuttgart.de.",
                "dns-auth2.uni-stuttgart.edu.",
                "dns-auth3.uni-stuttgart.net."
            ],
            "SOA": [
                "dns-hm0.rus.uni-stuttgart.de. dns-support.rus.uni-stuttgart.de. 2026080506 3600 900 1209600 3600"
            ],
            "CAA": [],
            "DS": [
                "44093 13 2 481616AD6F49108683FDD87268E748C972E5AD4D088D2A9555004AB3 1315F4B6"
            ],
            "DNSKEY": [
                "256 3 13 h4gL0lhTMrKC2dg4zQI/0kyALFkydiaKY4kyYgCa9tc3hjR7XSpKFAM/ TfHwTDTSYamE7QM8rPE4jIKoFxcvjg==",
                "257 3 13 IQAebn6QFu12i0Dai5MfmfN+tIty3rmYyfNPYP2rOP3+GTwaOGpECv0H xUPYKoe5CMe4TEByGk/CBCqZUTsZqw=="
            ],
            "RRSIG": [
                "NS 13 2 3600 20260907040129 20260808060052 3002 uni-stuttgart.de. 94gPWvFkuvBzxo1+xPUods9+rRxKR55lFbWVOWVhJ0oUQAi3uOPeZgUD IS6DYBc1ti8595nqktUX+tFBg9pvZQ==",
                "TXT 13 2 3600 20260907012524 20260808060053 3002 uni-stuttgart.de. l7LkoMhapP0JR4Q5x4/C1K5/S5e7x3ez2NT4qslSfKBGjkqoJhl58XA/ X5uPmD4cMhiUF8cUhBsCiqD9DUF92w==",
                "DS 8 2 86400 20260817120903 20260803103903 32911 de. dZg/AK/lDAoaynwXkniZHWEtab5q5A+vceU+4OA6YXO5R55Egv/89CVl 28XR+xjUgx9ud/JnbSIXIw2rJupT289uRSlURa1v4SCU1ulqlAPUytvo mrN57hHgvfO+NccGEbQVxBRmTyXMWGVqn9EQGUIO/IStgJirOfy9+mJR Wp8="
            ],
            "NSEC": [
                "dkim._domainkey.uni-stuttgart.de. A NS SOA MX TXT AAAA NAPTR RRSIG NSEC DNSKEY"
            ],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [
                "100 10 \"s\" \"x-eduroam:radius.tls\" \"\" _radsec._tcp.eduroam.de.",
                "100 10 \"s\" \"aaa+auth:radius.tls.tcp\" \"\" _radsec._tcp.openroaming.eduroam.org."
            ],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "129.69.0.47"
        ],
        "ipv6": [
            "2001:7c0:2041:48::47"
        ]
    },
    "mail": {
        "spf": "v=spf1 include:_spf.mxex.uni-stuttgart.de include:_spf.mailrelay.uni-stuttgart.de",
        "dmarc": "",
        "dkim_selector": "dkim",
        "dkim_host": "dkim._domainkey.uni-stuttgart.de",
        "dkim": "v=DKIM1; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAx65Gw5swxuiauBGQhSvuXY1UcF7qcsVheHJ1/4QwWLxAkcMXjsIPadtqGJzTdlW9psadOet4p9j7Tp57MjEVBJM+y9GfLXvo9Sfx2d47VrFQnOStrx97bJHaEnqWwOO9D2LUMUDHCnVcYH3DT3iXuNDPE+TA1tsD81sb8ZTK0wU5PQrwf4TxdXzqpUAbnvKBTT7WFc5t9Rrg6IwXCuQioVuHPW3JBPmh91M13mULFTa0h/EnTBM2LR2ZbE6S9bhcmL8xvLwRos4vUHaHbZt35/B99jV1sWDJy2gO34tMthOXpO7j1SbZPH+wsbuqE7A8ncu9y1Ee0gboqfeJLVuA3QIDAQAB",
        "spf_analysis": {
            "valid": true,
            "lookups": 2,
            "final": "",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": false,
            "policy": ""
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "uni-stuttgart.de",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "129.69.0.47"
                    ],
                    "time_ms": 277.95
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "129.69.0.47"
                    ],
                    "time_ms": 149.03
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "129.69.0.47"
                    ],
                    "time_ms": 148.42
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "129.69.0.47"
                    ],
                    "time_ms": 738.22
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "129.69.0.47"
                    ],
                    "time_ms": 139.14
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Hellenic Academic and Research Institutions CA",
        "subject": "redirector.rus.uni-stuttgart.de",
        "valid_from": "2025-11-10T03:37:11-06:00",
        "valid_to": "2026-11-10T03:37:11-06:00",
        "days_remaining": 93,
        "san": [
            "redirector.rus.uni-stuttgart.de",
            "unistuttgart.de",
            "uni-stuttgart.de",
            "uni-s.de",
            "uni-st.de",
            "speedtest.uni-s.de",
            "urlshortener.rus.uni-stuttgart.de"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://www.uni-stuttgart.de/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "date": "Sun, 09 Aug 2026 06:22:57 GMT",
            "server": "OpenCms/21.0.19",
            "x-frame-options": "DENY",
            "referrer-policy": "same-origin",
            "x-content-type-options": "nosniff",
            "strict-transport-security": "max-age=31536000;",
            "content-type": "text/html;charset=UTF-8",
            "location": "https://www.uni-stuttgart.de",
            "expires": "Sun, 09 Aug 2026 06:48:10 GMT",
            "cache-control": "max-age=1800, max-age=1800",
            "via": "1.1 nflcms1v1 (Varnish/7.7)",
            "last-modified": "Sun, 09 Aug 2026 06:22:57 GMT",
            "content-length": "156618",
            "x-varnish": "256626587 260671880",
            "age": "309",
            "x-varnish-action": "HIT",
            "x-varnish-hits": "53",
            "accept-ranges": "none",
            "content-security-policy": "frame-ancestors 'self' *.interzell-spp2170.com *.uni-stuttgart.de;"
        },
        "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": "OpenCms/21.0.19",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://www.uni-stuttgart.de/",
        "title": "Universität Stuttgart",
        "description": "Die Universität Stuttgart ist eine führende technisch orientierte Universität mit weltweiter Ausstrahlung. Ihr Weg ist die interdisziplinäre Integration von Ingenieur-, Natur-, Geistes- und Gesellschaftswissenschaften auf der Grundlage disziplinärer Spitzenforschung.",
        "success": true,
        "error": "",
        "status": 206
    },
    "network": {
        "129.69.0.47": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "mxex2.tik.uni-stuttgart.de",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 120.4,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 231,
                "banner": "",
                "error": "No connection"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 252.1,
                "banner": "220 mxex2.tik.uni-stuttgart.de ESMTP Postfix",
                "error": "No connection"
            }
        ]
    },
    "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": 82.33
}