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https://huangguoac.com

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
88
GRADE
B
FIX
0
REVIEW
6
PASS
11
INFO
0
Probed from Madrid, Spain
200 OK
Checks
17
11 PASS 6 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
0/5 IPs match cert SAN
REVIEW
0/5 IPs match cert SAN
Info::
PTR lookup failed for 43.229.39.230: lookup 43.229.39.230: 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 103.41.125.232: lookup 103.41.125.232: 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 103.41.185.233: lookup 103.41.185.233: 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 103.49.212.234: lookup 103.49.212.234: 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 43.230.144.231: lookup 43.230.144.231: 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
TLS Certificate Expiry & Recommendations
80 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

80
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
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.
A+
DNS Records
5 A records, 56 ms lookup
PASS
5 A records, 56 ms lookup
Info::
Resolves to 5 IPv4 address(es)
Got: 43.229.39.230, 103.41.125.232, 103.41.185.233, 103.49.212.234, 43.230.144.231
Info::
No IPv6 (AAAA) records
Info::
2 nameserver(s) configured
Got: olivia.ns.cloudflare.com, peyton.ns.cloudflare.com
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: 56 ms
Got: 56 ms
A43.229.39.230, 103.41.125.232, 103.41.185.233, 103.49.212.234, 43.230.144.231
AAAA—
CNAME—
NSolivia.ns.cloudflare.com, peyton.ns.cloudflare.com
MX—
TXT—
CAALookup not available with standard resolver
Resolved in 56 ms

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 26ms across 3 resolvers (spread 16ms)
PASS
Mean 26ms across 3 resolvers (spread 16ms)
Info::
Cloudflare: 18ms
Got: 18ms via 1.1.1.1:53
Info::
Quad9: 26ms
Got: 26ms via 9.9.9.9:53
Info::
Google: 34ms
Got: 34ms 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://huangguoac.com

https://huangguoac.com

412 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://huangguoac.com200412 msHTTP/1.1cloudflare
A+
Crawlability
robots.txt present, sitemap with 12 URLs
PASS
robots.txt present, sitemap with 12 URLs
Info::
robots.txt is present
Got: 1223 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 12 entries
Info::
Sitemap index with 12 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1223 B Sitemaps referenced 1 User-agents OAI-SearchBot, GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot, * Blocking No — crawling allowed
Sitemap: https://huangguoac.com/sitemap.xml

User-agent: *
Allow: /llms.txt
Allow: /llms-full.txt
Disallow: /admin/
Disallow: /admin
Disallow: /api/
Disallow: /upload/
Disallow: /cdn-cgi/l/email-protection

User-agent: OAI-SearchBot
Allow: /
Disallow: /admin
Disallow: /api/
Disallow: /upload/private/
Disallow: /search/
Disallow: /login/
Disallow: /register/
Disallow: /user/
Disallow: /embed/

# Explicit access for OpenAI model-training crawler.
# Change Allow: / to Disallow: / if training use is not authorized.
User-agent: GPTBot
Allow: /
Disallow: /admin
Disallow: /api/
Disallow: /upload/private/
Disallow: /search/
Disallow: /login/
Disallow: /register/
Disallow: /user/
Disallow: /embed/

User-agent: ChatGPT-User
Allow: /
Disallow: /admin
Disallow: /api/
Disallow: /upload/private/
Disallow: /login/
Disallow: /register/
Disallow: /user/

User-agent: ClaudeBot
Allow: /
Disallow: /admin
Disallow: /api/
Disallow: /upload/private/
Disallow: /search/
Disallow: /login/
Disallow: /register/
Disallow: /user/
Disallow: /embed/

User-agent: PerplexityBot
Allow: /
Disallow: /admin
Disallow: /api/
Disallow: /upload/private/
Disallow: /search/
Disallow: /login/
Disallow: /register/
Disallow: /user/
Disallow: /embed/
sitemap.xml 200 OK
Type Sitemap Index URLs 12 entries Valid XML Yes
Child Sitemaps:
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 301

www / non-www

301https://www.huangguoac.com/
200https://huangguoac.com/

Preferred variant: non-www

HTTP → HTTPS

301http://huangguoac.com/ → https://huangguoac.com/

Consistent

A+
Domain Intelligence
huangguoac.com — via Realtime Register B.V., 2 months old, hosted on Cloudflare
PASS
huangguoac.com — via Realtime Register B.V., 2 months old, hosted on Cloudflare
Info::
Domain registered until Aug 15, 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 Aug 15, 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: Realtime Register B.V.
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: Cloudflare
Got: AS13335
Domain expiry

296 days

August 15, 2027

SSL certificate

80 days

Issued by Google Trust Services

Domain age

2 months

Registered August 15, 2026

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS13335

43.230.144.231

Registrar

Realtime Register B.V.

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 Realtime Register B.V.
Created August 15, 2026 (2 months ago)
Expires August 15, 2027 (9 months)
Last Updated October 14, 2026
Name Servers olivia.ns.cloudflare.com, peyton.ns.cloudflare.com
DNSSEC Not enabled
Hosting
IP Address 43.230.144.231
ASN AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
Provider Cloudflare
Data source: rdap (0.3s)

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 610 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
35 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.
21 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
441 ms
Total Time Total request time from DNS lookup through full response.
611 ms

Connection waterfall

DNS Lookup 35 ms TCP Connect 17 ms TLS Handshake 21 ms Server Processing 368 ms Content Transfer 170 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Document is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: a4ed51e9fcab556d-CDG
Info::
CDN cache status: DYNAMIC
Document served via CDN: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: a4ed51e9fcab556d-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
A+
Health Check Endpoint
Health endpoint at https://huangguoac.com/health (HTTP 200)
PASS
Health endpoint at https://huangguoac.com/health (HTTP 200)
Info::
Public health endpoint at https://huangguoac.com/health
Got: https://huangguoac.com/health
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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