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https://smart-network.cz

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
91
GRADE
A
FIX
0
REVIEW
6
PASS
11
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
17
11 PASS 6 REVIEW
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
0/4 IPs match cert SAN
REVIEW
0/4 IPs match cert SAN
Info::
PTR lookup failed for 172.67.162.5: lookup 172.67.162.5: 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 104.21.49.113: lookup 104.21.49.113: 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 2606:4700:3030::6815:3171: lookup 2606:4700:3030::6815:3171: 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 2606:4700:3036::ac43:a205: lookup 2606:4700:3036::ac43:a205: 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
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 redirects to HTTPS permanently
Got: HTTP 301

www / non-www

200https://www.smart-network.cz/
200https://smart-network.cz/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://smart-network.cz/ → https://www.smart-network.cz/

Consistent

B
TLS Certificate Expiry & Recommendations
79 days until leaf cert expires — 2 issues to address
REVIEW

Certificate validity

79
days left
0d 30d 60d 90d+

Recommended actions

  • 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
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
2 A records, 43 ms lookup
PASS
2 A records, 43 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.67.162.5, 104.21.49.113
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:3030::6815:3171, 2606:4700:3036::ac43:a205
Info::
2 nameserver(s) configured
Got: vita.ns.cloudflare.com, cartman.ns.cloudflare.com
Info::
5 mail exchanger(s) configured
Info::
SPF record present in TXT
Info::
DNS resolution time: 43 ms
Got: 43 ms
A172.67.162.5, 104.21.49.113
AAAA2606:4700:3030::6815:3171, 2606:4700:3036::ac43:a205
CNAME—
NSvita.ns.cloudflare.com, cartman.ns.cloudflare.com
MX
1 aspmx.l.google.com
5 alt2.aspmx.l.google.com
5 alt1.aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
TXT
SPF v=spf1 include:_spf.google.com include:spf.smartemailing.cz include:amazonses.co...
google-site-verification=jzBVcSMzzmKCD-mp8OvgKtA5JRT3Jve54QuZpXHYwvQ
CAALookup not available with standard resolver
Resolved in 43 ms
A+
Subdomain Takeover
No subdomain takeover risk detected
PASS
No subdomain takeover risk detected
Info::
No CNAME record present
A+
DNSSEC
Signed and validating
PASS
Signed and validating
Info::
DNSSEC fully signed and chain validates (ECDSAP256SHA256)
A+
Multi-Resolver DNS Speed
Mean 36ms across 3 resolvers (spread 23ms)
PASS
Mean 36ms across 3 resolvers (spread 23ms)
Info::
Google: 28ms
Got: 28ms via 8.8.8.8:53
Info::
Cloudflare: 31ms
Got: 31ms via 1.1.1.1:53
Info::
Quad9: 51ms
Got: 51ms via 9.9.9.9:53
A
Redirect Chain
1 redirect(s), 310 ms total
PASS
1 redirect(s), 310 ms total
Info::
Single redirect
Got: https://smart-network.cz → https://www.smart-network.cz/ (301)
Info::
WWW normalization redirect

https://smart-network.cz

165 ms · HTTP/1.1

301

https://www.smart-network.cz/

144 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://smart-network.cz301165 msHTTP/1.1cloudflare
2https://www.smart-network.cz/200144 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2606:4700:3030::6815:3171, 2606:4700:3036::ac43:a205
Got: 17 ms connect
IPv6 Ready
AAAA Records 2606:4700:3030::6815:3171, 2606:4700:3036::ac43:a205 Connection Reachable (17 ms)
A+
Crawlability
robots.txt present, sitemap with 4 URLs
PASS
robots.txt present, sitemap with 4 URLs
Info::
robots.txt is present
Got: 1363 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 4 entries
Info::
Sitemap index with 4 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1363 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
# smart-network.cz — verejná časť je pre roboty OTVORENÁ vrátane AI crawlerov (chceme, aby nás
# modely citovali — viď docs/seo-geo-spec.md, GEO). Zatvorená je len členská sekcia a toky,
# ktoré sa hashom v URL dajú ODKLIKNUŤ: pozvánky, storno, GDPR súhlasy, platby. Robot, ktorý
# taký odkaz načíta, by tým vykonal akciu za člena.
# Rozhodnutie Andreja 2026-08-24: "boti na verejnej stránke sú dokonca žiadaní, nechceme ich
# len v členskej sekcii."

User-agent: *

# členská sekcia a administrácia (catch-all routa <module>/<presenter>/<action>)
Disallow: /admin/
Disallow: /member/
Disallow: /actions/
Disallow: /payment-transaction/
Disallow: /settings/
Disallow: /invoice/
Disallow: /blog/admin
Disallow: /backend/
Disallow: /profil-clena

# odkazy z e-mailov, ktoré načítaním vykonajú akciu (hash v URL)
Disallow: /nastaveni-clena-gdpr/
Disallow: /storno-pozvani/
Disallow: /reakce-na-pozvani/
Disallow: /reakce-na-pozvani-admin/
Disallow: /pozvani/

# rezervačný a platobný tok
Disallow: /rezervace/
Disallow: /rezervace-
Disallow: /reakce-vycerpan-limit-hosta
Disallow: /pozvani-vycerpan-limit-hosta
Disallow: /smart_payment/
Disallow: /platba/

# prihlásenie, API a náhľady
Disallow: /prihlaseni
Disallow: /odhlaseni
Disallow: /api/
Disallow: /email-preview/

Sitemap: https://www.smart-network.cz/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 4 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
smart-network.cz — via REG-INTERNET-CZ, 13 years, 2 months old
PASS
smart-network.cz — via REG-INTERNET-CZ, 13 years, 2 months old
Info::
Domain registered until Aug 10, 2027 (11 months remaining)
Info::
DNSSEC is enabled
Info::
Registrar: REG-INTERNET-CZ
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

349 days

August 10, 2027

SSL certificate

79 days

Issued by Google Trust Services

Domain age

13 years, 2 months

Registered August 11, 2013

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700:3036::ac43:a205

Registrar

REG-INTERNET-CZ

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar REG-INTERNET-CZ
Created August 11, 2013 (13 years, 2 months ago)
Expires August 10, 2027 (11 months)
Last Updated August 22, 2026
Name Servers cartman.ns.cloudflare.com, vita.ns.cloudflare.com
DNSSEC Enabled
Hosting
IP Address 2606:4700:3036::ac43:a205
Data source: rdap (0.5s)

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

Connection waterfall

DNS Lookup 46 ms TCP Connect 17 ms TLS Handshake 24 ms Server Processing 101 ms Content Transfer 0 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: a305fc03ac19d0a7-CDG
Info::
CDN cache status: DYNAMIC
CDN Detected: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: a305fc03ac19d0a7-CDG
A+
CDN Cache Observability
Cache state: DYNAMIC
PASS
Cache state: DYNAMIC
Info::
CDN cache state observable via 1 header(s)
Got: cf-cache-status=DYNAMIC
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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