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https://r3webdesign.de

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
89
GRADE
B
FIX
1
REVIEW
9
PASS
7
INFO
0
Probed from Sao Paulo, Brazil
200 OK
Checks
17
7 PASS 9 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN (document or assets)
FIX
No CDN (document or assets)
Warning::
No CDN (document or assets)
Neither the HTML document nor the page's subresources are served through an edge network. A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN (document or assets)

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

B
DNSSEC
Unsigned (DNSSEC not deployed)
REVIEW
Unsigned (DNSSEC not deployed)
Info::
DNSSEC is not deployed
The zone is not DNSSEC-signed. Users on validating resolvers (Cloudflare 1.1.1.1, Quad9 9.9.9.9, growing default in mobile resolvers) get no protection against DNS spoofing for this domain. Most registrars now offer DNSSEC at a single click; consider enabling it for sites where authenticity matters (banking, healthcare, government).
B
CAA Records
No CAA records (any CA may issue certificates)
REVIEW
No CAA records (any CA may issue certificates)
Info::
No CAA records published
Without CAA records, any publicly-trusted CA can issue certificates for this domain. Adding a CAA record (`yourdomain. IN CAA 0 issue "letsencrypt.org"`) restricts issuance to CAs you authorize. Required by CAB Forum baseline since 2017; the default of 'any CA' is widely supported but is the broader attack surface for issuance fraud.
C
Reverse DNS
Action
0/2 IPs match cert SAN
REVIEW
0/2 IPs match cert SAN
Info::
PTR lookup failed for 27.123.246.190: lookup 27.123.246.190: no such host
No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue.
Info::
PTR lookup failed for 2a0a:51c4:10:7e::1: lookup 2a0a:51c4:10:7e::1: no such host
No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue.
B
Multi-Resolver DNS Speed
Mean 159ms across 3 resolvers (spread 23ms)
REVIEW
Mean 159ms across 3 resolvers (spread 23ms)
Info::
Quad9: 151ms
Got: 151ms via 9.9.9.9:53
Info::
Google: 152ms
Got: 152ms via 8.8.8.8:53
Info::
Cloudflare: 174ms
Got: 174ms via 1.1.1.1:53
B
HTTP Probe Timing
Total 1352 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
347 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
199 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
206 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
953 ms
Total Time Total request time from DNS lookup through full response.
1.35 s

Connection waterfall

DNS Lookup 347 ms TCP Connect 199 ms TLS Handshake 206 ms Server Processing 201 ms Content Transfer 399 ms
B
TLS Certificate Expiry & Recommendations
86 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

86
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
B
CDN Cache Observability
No CDN cache-status headers in the response
REVIEW
No CDN cache-status headers in the response
Info::
No CDN cache-status headers in the response
Without an X-Cache / CF-Cache-Status / X-Vercel-Cache / Age header, you can't tell from outside whether a request hit the cache or went to origin. Operationally important: enables debugging stale-content reports and verifying cache rules. Most managed CDN platforms emit at least one of these by default; absence often means the platform's diagnostic headers are stripped at an upstream proxy.
B
Operational Status Page
No status page link detected
REVIEW
No status page link detected
Info::
No operational status page link detected
Status pages communicate planned maintenance and incidents to users -- a hallmark of operationally-mature services. Most SaaS teams publish one via Atlassian Statuspage, Instatus, BetterUptime, or a self-hosted Cachet. Smaller sites legitimately don't need one; flagged as Info, not a failure.
B
Health Check Endpoint
No conventional health endpoint found
REVIEW
No conventional health endpoint found
Info::
No conventional health endpoint found
Health endpoints (/health, /healthz, /status, /ping, /api/health) let uptime monitors, load balancers, and orchestration systems (Kubernetes, ECS, Fly.io) verify the service is alive. Marketing sites and small services often skip them legitimately; flagged as Info, not a failure. Probe results: /api/health: 404, /health: 404, /healthz: 404, /ping: 404, /status: 404.
A
DNS Records
1 A records, 357 ms lookup
PASS
1 A records, 357 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 27.123.246.190
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: 2a0a:51c4:10:7e::1
Info::
4 nameserver(s) configured
Got: ns01dav.mailtory.de, ns02mar.mailtory.de, ns03fry.mailtory.de, ns04hek.mailtory.de
Info::
1 mail exchanger(s) configured
Info::
SPF record present in TXT
Warning::
DNS resolution is slow (357 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 357 ms
A27.123.246.190
AAAA2a0a:51c4:10:7e::1
CNAME—
NSns01dav.mailtory.de, ns02mar.mailtory.de, ns03fry.mailtory.de, ns04hek.mailtory.de
MX
10 hps4.mailtory.de
TXT
SPF v=spf1 include:mailtory.de -all
google-site-verification=0ZXpN4nayc7APxKBHGPPW7uDBF25faTXrMcBS-gHH3M
CAALookup not available with standard resolver
Resolved in 357 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

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+
Subdomain Takeover
No subdomain takeover risk detected
PASS
No subdomain takeover risk detected
Info::
No CNAME record present
A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://r3webdesign.de

https://r3webdesign.de

956 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://r3webdesign.de200956 msHTTP/1.1
A+
IPv6 Readiness
IPv6 reachable (196 ms)
PASS
IPv6 reachable (196 ms)
Info::
IPv6 is configured and reachable at 2a0a:51c4:10:7e::1
Got: 196 ms connect
IPv6 Ready
AAAA Records 2a0a:51c4:10:7e::1 Connection Reachable (196 ms)
A+
Crawlability
robots.txt present, sitemap with 22 URLs
PASS
robots.txt present, sitemap with 22 URLs
Info::
robots.txt is present
Got: 67 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 22 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 67 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Allow: /

Sitemap: https://r3webdesign.de/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 22 entries Valid XML Yes
Sample URLs:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly redirects to HTTPS permanently
Got: HTTP 308

www / non-www

301https://www.r3webdesign.de/
200https://r3webdesign.de/

Preferred variant: non-www

HTTP → HTTPS

308http://r3webdesign.de/ → https://r3webdesign.de/

Consistent

A+
Domain Intelligence
r3webdesign.de
PASS
r3webdesign.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

86 days

Issued by Let's Encrypt

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2a0a:51c4:10:7e::1

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 2a0a:51c4:10:7e::1
Data source: whois (1.1s)

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

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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