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Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
90
GRADE
A
FIX
0
REVIEW
8
PASS
9
INFO
0
Probed from Madrid, Spain
200 OK
Checks
17
9 PASS 8 REVIEW
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
0/4 IPs match cert SAN
REVIEW
0/4 IPs match cert SAN
Info::
PTR lookup failed for 188.114.97.2: lookup 188.114.97.2: 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 188.114.96.2: lookup 188.114.96.2: 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 2a06:98c1:3120::2: lookup 2a06:98c1:3120::2: 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 2a06:98c1:3121::2: lookup 2a06:98c1:3121::2: 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
TLS Certificate Expiry & Recommendations
63 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

63
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • 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 & Delivery
Cloudflare
REVIEW
Cloudflare
Info::
Document is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: a4b88f71cadb7808-CDG
Document served via CDN: Cloudflare
Provider Cloudflare Evidence cf-ray: a4b88f71cadb7808-CDG
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
2 A records, 31 ms lookup
PASS
2 A records, 31 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 188.114.97.2, 188.114.96.2
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2a06:98c1:3120::2, 2a06:98c1:3121::2
Info::
2 nameserver(s) configured
Got: alexis.ns.cloudflare.com, june.ns.cloudflare.com
Info::
3 mail exchanger(s) configured
Info::
SPF record present in TXT
Info::
DNS resolution time: 31 ms
Got: 31 ms
A188.114.97.2, 188.114.96.2
AAAA2a06:98c1:3120::2, 2a06:98c1:3121::2
CNAME—
NSalexis.ns.cloudflare.com, june.ns.cloudflare.com
MX
10 route2.mx.cloudflare.net
19 route3.mx.cloudflare.net
59 route1.mx.cloudflare.net
TXT
SPF v=spf1 include:_spf.mx.cloudflare.net ~all
google-site-verification=SiNRN0BS9nieOTZuOWeWj2q5WVm1Pnkf_nTTaoxXWJ4
CAALookup not available with standard resolver
Resolved in 31 ms
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 20ms across 3 resolvers (spread 22ms)
PASS
Mean 20ms across 3 resolvers (spread 22ms)
Info::
Quad9: 7ms
Got: 7ms via 9.9.9.9:53
Info::
Cloudflare: 24ms
Got: 24ms via 1.1.1.1:53
Info::
Google: 29ms
Got: 29ms via 8.8.8.8:53
A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://gaokaoexam.org/subjects/english/practice/2025-national-paper-1

https://gaokaoexam.org/subjects/english/...

110 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://gaokaoexam.org/subjects/english/...200110 msHTTP/1.1cloudflare
A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2a06:98c1:3120::2, 2a06:98c1:3121::2
Got: 17 ms connect
IPv6 Ready
AAAA Records 2a06:98c1:3120::2, 2a06:98c1:3121::2 Connection Reachable (17 ms)
A
Crawlability
no robots.txt, sitemap with 18 URLs
PASS
no robots.txt, sitemap with 18 URLs
Info::
No robots.txt found
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 18 entries

robots.txt is optional but recommended. It tells search engine crawlers which pages to index.

Why this matters

No robots.txt — crawlers fetch /robots.txt and get 404; not breaking but means default crawl behavior with no directives or sitemap reference.

Learn more ▾

A minimal robots.txt with `User-agent: * / Allow: / / Sitemap: https://example.com/sitemap.xml` covers the basics. Without it, crawlers behave fine but lose the sitemap signal and can't be selectively blocked from crawl-traps.

Source: robotstxt.org

robots.txt No robots.txt found

No robots.txt found

This is fine for most sites — a missing robots.txt allows all crawling by default.

sitemap.xml 200 OK
Type URL Set URLs 18 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)
Warning::
Trailing slash inconsistency — both versions serve content
Got: Both with/without trailing slash return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly redirects to HTTPS permanently
Got: HTTP 301

www / non-www

301https://www.gaokaoexam.org/subjects/english/practice/2025-national-paper-1
200https://gaokaoexam.org/subjects/english/practice/2025-national-paper-1

Preferred variant: non-www

Trailing Slash

200https://gaokaoexam.org/subjects/english/practice/2025-national-paper-1/
200https://gaokaoexam.org/subjects/english/practice/2025-national-paper-1

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://gaokaoexam.org/subjects/english/practice/2025-national-paper-1 → https://gaokaoexam.org/subjects/english/practice/2025-national-paper-1

Consistent

A+
Domain Intelligence
gaokaoexam.org — via NameSilo, LLC, 2 months old
PASS
gaokaoexam.org — via NameSilo, LLC, 2 months old
Info::
Domain registered until Jul 19, 2027 (9 months remaining)
Info::
Domain is only 2 months old
Newly registered domains may face SEO trust challenges. Search engines generally give more authority to older domains. This is informational — not a problem to fix.
Got: Registered Jul 19, 2026
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: NameSilo, LLC
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

273 days

July 19, 2027

SSL certificate

63 days

Issued by Google Trust Services

Domain age

2 months

Registered July 19, 2026

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2a06:98c1:3120::2

Registrar

NameSilo, LLC

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Newly registered domain — build backlinks and content to establish SEO trust
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar NameSilo, LLC
Created July 19, 2026 (2 months ago)
Expires July 19, 2027 (9 months)
Last Updated August 12, 2026
Name Servers alexis.ns.cloudflare.com, june.ns.cloudflare.com
DNSSEC Not enabled
Hosting
IP Address 2a06:98c1:3120::2
Data source: rdap (0.4s)

Newly registered domains may face SEO trust challenges. Search engines generally give more authority to older domains. This is informational — not a problem to fix.

Why this matters

Informational: domain age. Newer domains may have lower trust signals in spam/security filters.

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

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 572 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
41 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.
28 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
572 ms
Total Time Total request time from DNS lookup through full response.
573 ms

Connection waterfall

DNS Lookup 41 ms TCP Connect 17 ms TLS Handshake 28 ms Server Processing 486 ms Content Transfer 1 ms
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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