Skip to content
https://strato.de

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Sao Paulo, Brazil
301 Moved Permanently
Checks
9
5 PASS 3 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

B
Redirect Chain
1 redirect(s), 1610 ms total
REVIEW
1 redirect(s), 1610 ms total
Info::
Single redirect
Got: https://strato.de → https://www.strato.de/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 1610 ms total
Got: 1610 ms

https://strato.de

800 ms · HTTP/1.1

301

https://www.strato.de/

810 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://strato.de301800 msHTTP/1.1nginx/1.14.1
2https://www.strato.de/200810 msHTTP/1.1nginx/1.14.1

See the visual redirect chain in the HTTP Probe tab →

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
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
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.strato.de/
200https://strato.de/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://strato.de/ → https://www.strato.de/

Consistent

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

Certificate validity

138
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
1 A records, 1385 ms lookup
PASS
1 A records, 1385 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 192.67.198.33
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2a01:238:20a:202:6660:0:198:33
Info::
4 nameserver(s) configured
Got: ns2.strato.de, ns-anyslv.ui-dns.de, ns1.strato.de, ns4.strato.de
Info::
1 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 (1385 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 1385 ms
A192.67.198.33
AAAA2a01:238:20a:202:6660:0:198:33
CNAME—
NSns2.strato.de, ns-anyslv.ui-dns.de, ns1.strato.de, ns4.strato.de
MX
1 smtp.google.com
TXT
_xbng04g3oajsqj39peb49y1xm34i9zw
_telesec-domain-validation=2025-01-21_LmfEGoTgPqgJMaCxorMDNS2AdsqoQLzecdrxyyMg2v...
knowbe4-site-verification=ea92e091b44a2e728b98725e65e73528
bztf4l28jjz36ldxpgxpb3j16w0573x8
X-NIC Certified Quality Zone
_cuzi5qci9s7s8hn0mavqae6ehca7bmu
4btvf4r50tzz12bg5qhndx3301tqsf6f
docker-verification=e4c78c46-4006-4ebe-9f45-a21943106615
MS=ms57092901
flexera-domain-verification-istusjrqrnokqdqz
apple-domain-verification=c5AYpwx37Vii11g0
google-site-verification=wrxqXbUddA0HM62nkrDFeqIqavU_4qUXBOc8nH42RvU
google-site-verification=hkIYPFLCjRTsOk7E8u24c1UVQHQpNKt8fVwqA2drFPc
r94c4lgtsx45rsfx1c4jgyhhg0tsgsyx
anthropic-domain-verification-ahgss2=bKjL5BoP3OH7rUfArBk7XeR6p
figma-domain-verification=bf994688b54b476ea25cff12b37502eef47a3bad935472aa4fbafa...
SPF v=spf1 a:ap4-p00-ob.smtp.rzone.de a:ap4-p02-ob.smtp.rzone.de a:ap4-p03-ob.smtp.r...
browserstack-domain-verification=bd6ad633-28d3-489a-a562-403c8b6e9def
atlassian-domain-verification=KAEkvhtoErKIDdiyb7e0wzavuISNOteHVzuoJX6M4VNN5REeLH...
CAALookup not available with standard resolver
Resolved in 1385 ms

Multiple A records provide failover if one server goes down.

Why this matters

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.

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+
IPv6 Readiness
IPv6 reachable (192 ms)
PASS
IPv6 reachable (192 ms)
Info::
IPv6 is configured and reachable at 2a01:238:20a:202:6660:0:198:33
Got: 192 ms connect
IPv6 Ready
AAAA Records 2a01:238:20a:202:6660:0:198:33 Connection Reachable (192 ms)
A+
Crawlability
robots.txt present, sitemap with 531 URLs
PASS
robots.txt present, sitemap with 531 URLs
Info::
robots.txt is present
Got: 199 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 531 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 199 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
# robots.txt file
# fuer www.strato.de
User-agent: *
Sitemap: https://www.strato.de/sitemap.xml

# Block all crawlers for
User-agent: *
Disallow: /apps/
Disallow: /error/
Allow: /apps/CustomerService
sitemap.xml 200 OK
Type URL Set URLs 531 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
strato.de
PASS
strato.de
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.
Domain expiry

Unknown

SSL certificate

138 days

Issued by Sectigo Limited

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2a01:238:20a:202:6660:0:198:33

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 2a01:238:20a:202:6660:0:198:33
Data source: whois (1.3s)

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 799 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
201 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
196 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
205 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
800 ms
Total Time Total request time from DNS lookup through full response.
800 ms

Connection waterfall

DNS Lookup 201 ms TCP Connect 196 ms TLS Handshake 205 ms Server Processing 197 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback