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https://www.sazimebudoucnost.cz

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
85
GRADE
B
FIX
1
REVIEW
9
PASS
7
INFO
0
Probed from Madrid, Spain
200 OK
Checks
17
7 PASS 9 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
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
0/1 IPs match cert SAN
REVIEW
0/1 IPs match cert SAN
Info::
PTR lookup failed for 40.114.252.156: lookup 40.114.252.156: 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.
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
HTTP Probe Timing
Total 1474 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
74 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
27 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
60 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
1.45 s
Total Time Total request time from DNS lookup through full response.
1.47 s

Connection waterfall

DNS Lookup 74 ms TCP Connect 27 ms TLS Handshake 60 ms Server Processing 1.29 s Content Transfer 26 ms
B
TLS Certificate Expiry & Recommendations
30 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

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

Recommended actions

  • Renew certificate — 30 days remaining
  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • 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: connection error, /health: connection error, /healthz: connection error, /ping: connection error, /status: connection error.
A
DNS Records
1 A records, 71 ms lookup
PASS
1 A records, 71 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 40.114.252.156
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
No NS records found
Info::
No MX records — email not configured via DNS
Info::
No SPF record found in TXT records
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Info::
DNS resolution time: 71 ms
Got: 71 ms
A40.114.252.156
AAAA—
CNAME—
NS—
MX—
TXT—
CAALookup not available with standard resolver
Resolved in 71 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

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

Why this matters

Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.

Learn more ▾

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)

A+
Subdomain Takeover
No subdomain takeover risk detected
PASS
No subdomain takeover risk detected
Info::
No CNAME record present
A
Multi-Resolver DNS Speed
Mean 63ms across 3 resolvers (spread 45ms)
PASS
Mean 63ms across 3 resolvers (spread 45ms)
Info::
Google: 38ms
Got: 38ms via 8.8.8.8:53
Info::
Cloudflare: 70ms
Got: 70ms via 1.1.1.1:53
Info::
Quad9: 83ms
Got: 83ms via 9.9.9.9:53
A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://www.sazimebudoucnost.cz

https://www.sazimebudoucnost.cz

116 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://www.sazimebudoucnost.cz200116 msHTTP/1.1Microsoft-IIS/10.0
A+
Crawlability
robots.txt present, sitemap with 898 URLs
PASS
robots.txt present, sitemap with 898 URLs
Info::
robots.txt is present
Got: 1004 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 898 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1004 B Sitemaps referenced 1 User-agents CloudflareBrowserRenderingCrawler, Google-Extended, GPTBot, *, Amazonbot, Applebot-Extended, Bytespider, CCBot, meta-externalagent, ClaudeBot Blocking No — crawling allowed
User-agent: *

Content-Signal: search=yes,ai-train=no,use=reference
Allow: /

Disallow: /Test/

Disallow: /Reporty/

Disallow: /Results/

Disallow: /Specialni/

Disallow: /Specialni-stranky/

Disallow: /Special-pages/

Disallow: /Organizacni-struktura

Disallow: /*/test/

Disallow: */test/


User-agent: Amazonbot

Disallow: /


User-agent: Applebot-Extended

Disallow: /


User-agent: Bytespider

Disallow: /


User-agent: CCBot

Disallow: /


User-agent: ClaudeBot

Disallow: /


User-agent: CloudflareBrowserRenderingCrawler

Disallow: /


User-agent: Google-Extended

Disallow: /


User-agent: GPTBot

Disallow: /


User-agent: meta-externalagent

Disallow: /


# END Cloudflare Managed Content


User-agent: *

Allow: /

Disallow: /Test/

Disallow: /Reporty/

Disallow: /Results/

Disallow: /Specialni/

Disallow: /Specialni-stranky/

Disallow: /Special-pages/

Disallow: /Organizacni-struktura

Disallow: /*/test/

Disallow: */test/


Sitemap: https://nadacepartnerstvi.cz/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 898 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: www)
Warning::
HTTP→HTTPS redirect is not permanent
Got: HTTP 302 Expected: 301 or 308 permanent redirect

www / non-www

200https://www.sazimebudoucnost.cz/
302https://sazimebudoucnost.cz/

Preferred variant: www

HTTP → HTTPS

302http://www.sazimebudoucnost.cz/ → https://www.sazimebudoucnost.cz/

Use a permanent redirect (301 or 308) instead of a temporary one

A+
Domain Intelligence
sazimebudoucnost.cz — via REG-WEB4U, 7 years, 5 months old, hosted on Microsoft Azure
PASS
sazimebudoucnost.cz — via REG-WEB4U, 7 years, 5 months old, hosted on Microsoft Azure
Info::
Domain registered until Apr 25, 2027 (8 months remaining)
Info::
DNSSEC is enabled
Info::
Registrar: REG-WEB4U
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: Microsoft Azure
Got: AS8075
Domain expiry

240 days

April 25, 2027

SSL certificate

30 days

Issued by Let's Encrypt

Domain age

7 years, 5 months

Registered April 26, 2019

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Microsoft Azure

ASN AS8075

40.114.252.156

Registrar

REG-WEB4U

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the TLS certificate or verify auto-renewal is working
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar REG-WEB4U
Created April 26, 2019 (7 years, 5 months ago)
Expires April 25, 2027 (8 months)
Last Updated April 26, 2019
Name Servers ns2.web4u.cz, ns.web4u.cz
DNSSEC Enabled
Hosting
IP Address 40.114.252.156
ASN AS8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US)
Provider Microsoft Azure
Data source: rdap (0.7s)

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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