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https://spektrum.de

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
82
GRADE
B
FIX
1
REVIEW
2
PASS
6
INFO
0
Probed from Sao Paulo, Brazil
301 Moved Permanently
Checks
9
6 PASS 2 REVIEW 1 FIX
D
URL Variants
Action
www/non-www, trailing slash, HTTP→HTTPS
FIX
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Critical::
HTTP version does not redirect to HTTPS
Got: HTTP 301 Expected: 301 redirect to HTTPS

www / non-www

200https://www.spektrum.de/
200https://spektrum.de/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://spektrum.de/ → http://www.spektrum.de/

HTTP version does not redirect to HTTPS

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
TLS Certificate Expiry & Recommendations
69 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

69
days left
0d 30d 60d 90d+

Recommended actions

  • Add includeSubDomains to the HSTS directive
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • 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 Records
4 A records, 393 ms lookup
PASS
4 A records, 393 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 151.101.130.132, 151.101.2.132, 151.101.194.132, 151.101.66.132
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: d.ns14.net, c.ns14.net, b.ns14.net, a.ns14.net
Info::
2 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Warning::
DNS resolution is slow (393 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 393 ms
A151.101.130.132, 151.101.2.132, 151.101.194.132, 151.101.66.132
AAAA—
CNAME—
NSd.ns14.net, c.ns14.net, b.ns14.net, a.ns14.net
MX
10 mxa-002c5801.gslb.pphosted.com
20 mxb-002c5801.gslb.pphosted.com
TXT
SPF v=spf1 a mx ip4:195.128.10.15/32 ip4:195.128.10.18/32 ip4:148.251.217.244/32 ip4...
cisco-ci-domain-verification=5bb4ceb849e38c199dccdfa34101051ac1e5b7f57dbf2ad16e8...
monday-com-verification=gIfsbiBtQzvmY8SR8gmXmURzurNdeyafwCzP_vHk4wk
adobe-idp-site-verification=e7d316e26179ad0d4b3f90cf2a0754eec7efe5ffd4e42fd68fb1...
docusign=7f13fe88-8e09-4c3f-9d2d-9c50a2991ab8
brevo-code:3022b29c6069a0b2ab4ad1eae06d06df
MS=ms20744618
google-site-verification=ibTUzbPN5zmQ4prYzWVsks7lGFJrCaBhAog_MW7g5co
zapier-domain-verification-challenge=19ab0fb9-731c-4da1-946f-121aa68f6a2c
openai-domain-verification=dv-tm1EOrVdxJc74WHLQJcRsUny
deepl-domain-verification=b8faec8a0acd4830a6c745d36a104c04
onetrust-domain-verification=13f142ba100a4b88aaba4a6e1102cde5
monday-com-verification=gAZywa4vaGsfLg6nd5lzh_H0u2mYn7u-W075cd-3X78
CAALookup not available with standard resolver
Resolved in 393 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

A+
Redirect Chain
0 redirect(s), 395 ms total
PASS
0 redirect(s), 395 ms total

https://spektrum.de

395 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://spektrum.de301395 msHTTP/1.1Varnish
A+
Crawlability
robots.txt present, sitemap with 28 URLs
PASS
robots.txt present, sitemap with 28 URLs
Info::
robots.txt is present
Got: 171 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 28 entries
Info::
Sitemap index with 28 child sitemaps
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 171 B Sitemaps referenced 0 User-agents GPTBot, *, MS Search 4.0 Robot, MJ12bot Blocking No — crawling allowed
User-agent: MS Search 4.0 Robot
Disallow: /

User-agent: MJ12bot
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: *
Disallow: /icons/
Disallow: /template/warenkorb
sitemap.xml 200 OK
Type Sitemap Index URLs 28 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
spektrum.de — hosted on Fastly
PASS
spektrum.de — hosted on Fastly
Warning::
Registrar lock is NOT enabled
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.
Info::
Hosting: Fastly
Got: AS54113
Domain expiry

Unknown

SSL certificate

69 days

Issued by Let's Encrypt

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Fastly

ASN AS54113

151.101.130.132

Registrar

Registrar unknown

Unlocked Name servers unknown
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar
Hosting
IP Address 151.101.130.132
ASN AS54113 (FASTLY - Fastly, Inc., US)
Provider Fastly
Data source: whois (1.4s)

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.

Why this matters

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

A+
HTTP Probe Timing
Total 396 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
388 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
5 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
396 ms
Total Time Total request time from DNS lookup through full response.
396 ms

Connection waterfall

DNS Lookup 388 ms TCP Connect 1 ms TLS Handshake 5 ms Server Processing 2 ms Content Transfer 0 ms
A+
CDN & Delivery
Fastly (HIT)
PASS
Fastly (HIT)
Info::
Site is served via Fastly CDN
Got: x-served-by: cache-gru-sbsp2090050-GRU
Info::
CDN cache status: HIT
CDN Detected: Fastly
Provider Fastly Cache Status HIT Evidence x-served-by: cache-gru-sbsp2090050-GRU
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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