Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
BCrawlabilityrobots.txt present, no sitemapREVIEW
A sitemap helps search engines discover and index your pages more efficiently.
No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.
Learn more ▾ ▴
A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.
Source: sitemaps.org / Google Search Central
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.
robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.
Source: sitemaps.org
User-agent: msnbot-media/1.1
Disallow: /
User-agent: msnbot-media/2.0b
Disallow: /
User-agent: Googlebot-News
Disallow: /noch-fragen/
Disallow: /action/
Disallow: /sn/
Disallow: /syndication/
Disallow: /elastic/
Disallow: /gutscheine/
Disallow: /search?
Disallow: /vergleich/
Disallow: /p-api/*
Disallow: /siegel/aerzte/
Disallow: /p-user/
User-agent: scrapy
Disallow: /
User-agent: Diffbot
Disallow: /
User-agent: RyteBot
Disallow: /
User-agent: proximic
Disallow: /*&share=*
User-agent: GPTBot
Disallow: /
User-agent: ChatGPT-User
Disallow: /
User-agent: Applebot-Extended
Disallow: /
User-agent: CCBot
Disallow: /
User-agent: Google-Extended
Disallow: /
User-agent: *
Disallow: /action/
Disallow: /sn/
Disallow: /syndication/
Disallow: /elastic/
Disallow: /gutscheine/wp-admin/
Disallow: /search?
Disallow: /vergleich/zum/
Disallow: /siegel/aerzte/
Disallow: /p-api/
Disallow: /p-user/
Disallow: /suche/
No sitemap found
Adding a sitemap helps search engines discover your pages.
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations72 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable DNSSEC on your domain for DNS spoofing protection
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+DNS Records1 A records, 42 ms lookupPASS
| A | 207.174.61.1 |
| AAAA | — |
| CNAME | — |
| NS | ns-851.awsdns-42.net, ns-1307.awsdns-35.org, ns-1657.awsdns-15.co.uk, ns-54.awsdns-06.com |
| MX | 10 marduk.rtl.de 10 assur.rtl.de 20 sul.rtl.de 20 sulis.rtl.de |
| TXT | facebook-domain-verification=anro1ovcjkyxqwimh0lq7eboulo46b openai-domain-verification=dv-QN1ODCclbeEju8zYIzaldJDl atlassian-domain-verification=Kl3ByU1tsfV9fKiC7TDDZYz1uCeTeUo0SSEh5SitZ9q99Ua74O... knowbe4-site-verification=9f84b0069b8711b7d78efc51717ae64a SPF v=spf1 ip4:194.12.192.0/19 ip4:193.16.163.16 ip4:193.16.163.17 ip4:62.225.111.13... sNWN5aM0BTtlJt2jsPBX4+s5RY6pSJ7btNFaE+Sjo7bSd7uz54PrlpCeuhco/h/NxJiH/WdhHSKmyZzg... google-site-verification=0LPqW3ngi7NOIsUfsmXm5827TOvKfh_OVQ8wsBtI3Wo adobe-idp-site-verification=d0c425a4-3baf-4f0f-839a-77405c026049 Sendinblue-code:6ef1bdca0140128a0b0cdffd769c529f MS=ms57707376 miro-verification=cb749e1ffbea1463e5ad819295f54687fc362039 google-site-verification=MHlhpAUy-2_lW67H5knj8VG2ksH0Eyp7AcGdlmF2c8I facebook-domain-verification=qqqa5t9rcj1082aritwg35kos5q4y2 adobe-idp-site-verification=6afb72c9c82f99bfe04f0d867f1ee4d51df22e914fd17ab2966e... |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.
Learn more ▾ ▴
Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.
Source: SRE practice / DNS architecture
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.
ARedirect Chain1 redirect(s), 185 ms totalPASS
https://stern.de
100 ms · HTTP/1.1
https://www.stern.de/
85 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://stern.de | 301 | 100 ms | HTTP/1.1 | |
| 2 | https://www.stern.de/ | 200 | 85 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
A+Domain Intelligencestern.de — hosted on AWSPASS
Unknown
72 days
Issued by Let's Encrypt
Unknown
Status unknown
Protects against DNS spoofing
AWS
ASN AS16509
207.174.61.1
Registrar unknown
Expiry timeline
Recommended actions
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.
Learn more ▾ ▴
Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.
Source: ICANN / domain-security best practice