Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.BDNS Records2 A records, 21 ms lookupREVIEW
| A | 104.18.8.228, 104.18.9.228 |
| AAAA | 2606:4700::6812:8e4, 2606:4700::6812:9e4 |
| CNAME | www.lufthansa.com.cdn.cloudflare.net |
| NS | — |
| MX | — |
| TXT | — |
| CAA | Lookup not available with standard resolver |
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.
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RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.
Source: RFC 1034
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.
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SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.
Source: RFC 7208 (SPF)
BCrawlabilityrobots.txt present, sitemap with 0 URLsREVIEW
Search engines may not be able to parse the sitemap. Fix XML validation errors.
An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.
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Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.
Source: sitemaps.org / Google Search Central
An empty sitemap provides no value. Add <url> entries for your pages.
An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.
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Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.
Source: Google Search Central / sitemaps.org
# robots.txt https://www.lufthansa.com/
User-agent: *
Allow: /
Disallow: /deeplink
Disallow: /service/secured
Sitemap: https://www.lufthansa.com/sitemap/sitemap_lh.xml.gz
Sitemap: https://www.lufthansa.com/aircore/sitemaps/sitemap-index.xml
BTLS Certificate Expiry & Recommendations187 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
Recommended actions
- Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
- Add includeSubDomains to the HSTS directive
- Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
BCDN & DeliveryCloudflareREVIEW
ARedirect Chain1 redirect(s), 176 ms totalPASS
https://www.lufthansa.com
134 ms · HTTP/1.1
https://www.lufthansa.com/us/en/homepage
42 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://www.lufthansa.com | 302 | 134 ms | HTTP/1.1 | cloudflare |
| 2 | https://www.lufthansa.com/us/en/homepage | 200 | 42 ms | HTTP/1.1 | cloudflare |
See the visual redirect chain in the HTTP Probe tab →
If permanent, use 301 instead.
302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.
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Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).
Source: Google Search Central
A+IPv6 ReadinessIPv6 reachable (1 ms)PASS
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: www
HTTP → HTTPS
Consistent
A+Domain Intelligencelufthansa.com — via CSC Corporate Domains, Inc., 30 years, 8 months old, hosted on Microsoft AzurePASS
180 days
January 9, 2027
187 days
Issued by Sectigo Limited
30 years, 8 months
Registered January 10, 1996
Enabled
Protects against DNS spoofing
Microsoft Azure
ASN AS8075
20.101.251.232
CSC Corporate Domains, Inc.