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https://www.linkcentre.com/profile/unmineableminer/

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
90
GRADE
A
FIX
0
REVIEW
5
PASS
12
INFO
0
Probed from Madrid, Spain
200 OK
Checks
17
12 PASS 5 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
0/6 IPs match cert SAN
REVIEW
0/6 IPs match cert SAN
Info::
PTR lookup failed for 104.26.5.110: lookup 104.26.5.110: 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 172.67.68.107: lookup 172.67.68.107: 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 104.26.4.110: lookup 104.26.4.110: 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 2606:4700:20::681a:46e: lookup 2606:4700:20::681a:46e: 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 2606:4700:20::ac43:446b: lookup 2606:4700:20::ac43:446b: 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 2606:4700:20::681a:56e: lookup 2606:4700:20::681a:56e: 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
49 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

49
days left
0d 30d 60d 90d+

Recommended actions

  • 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
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
3 A records, 36 ms lookup
PASS
3 A records, 36 ms lookup
Info::
Resolves to 3 IPv4 address(es)
Got: 104.26.5.110, 172.67.68.107, 104.26.4.110
Info::
Has 3 IPv6 (AAAA) record(s)
Got: 2606:4700:20::681a:46e, 2606:4700:20::ac43:446b, 2606:4700:20::681a:56e
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: 36 ms
Got: 36 ms
A104.26.5.110, 172.67.68.107, 104.26.4.110
AAAA2606:4700:20::681a:46e, 2606:4700:20::ac43:446b, 2606:4700:20::681a:56e
CNAME—
NS—
MX—
TXT—
CAALookup not available with standard resolver
Resolved in 36 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 15ms across 3 resolvers (spread 27ms)
PASS
Mean 15ms across 3 resolvers (spread 27ms)
Info::
Quad9: 1ms
Got: 1ms via 9.9.9.9:53
Info::
Cloudflare: 17ms
Got: 17ms via 1.1.1.1:53
Info::
Google: 28ms
Got: 28ms 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://www.linkcentre.com/profile/unmineableminer/

https://www.linkcentre.com/profile/unmin...

111 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://www.linkcentre.com/profile/unmin...200111 msHTTP/1.1cloudflare
A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2606:4700:20::681a:46e, 2606:4700:20::ac43:446b, 2606:4700:20::681a:56e
Got: 17 ms connect
IPv6 Ready
AAAA Records 2606:4700:20::681a:46e, 2606:4700:20::ac43:446b, 2606:4700:20::681a:56e Connection Reachable (17 ms)
A+
Crawlability
robots.txt present, sitemap with 52 URLs
PASS
robots.txt present, sitemap with 52 URLs
Info::
robots.txt is present
Got: 2135 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 52 entries
Info::
Sitemap index with 52 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 2135 B Sitemaps referenced 1 User-agents Google-Extended, FacebookBot, Screaming Frog SEO Spider, GPTBot, ChatGPT-User, anthropic-ai, PerplexityBot, cohere-ai, meta-externalagent, YouBot, AhrefsBot, Claude-Web, MJ12bot, Bingbot, Applebot-Extended, *, SemrushBot Blocking No — crawling allowed
# LinkCentre robots.txt

# Updated: 2025-11-27 - Added AI crawler directives


# ============================================

# DEFAULT RULES

# ============================================

User-agent: *

Allow: /

Disallow: /rate/

Disallow: /linkout/

Disallow: /search/?*page=

Disallow: /profile/websitesgb/

Disallow: /top.php

Disallow: /admin/

Disallow: /cache/

Disallow: /logs/

Disallow: /scripts/

Disallow: /backups/

Crawl-delay: 1

# ============================================

# SEO TOOLS - Rate Limited

# ============================================

User-agent: Screaming Frog SEO Spider

Disallow: /


User-agent: AhrefsBot

Crawl-delay: 10

User-agent: SemrushBot

Crawl-delay: 10

User-agent: MJ12bot

Crawl-delay: 10

# ============================================

# AI CRAWLER PERMISSIONS

# ============================================


# OpenAI / ChatGPT

User-agent: GPTBot

Allow: /profile/

Allow: /review/

Allow: /dir/

Allow: /directory/

Allow: /charity/

Allow: /about-us/

Allow: /addurl/

Allow: /get-started/

Allow: /help-guide/

Allow: /llms.txt

Allow: /llms-full.txt

Disallow: /admin/

Disallow: /secure/

Crawl-delay: 2

User-agent: ChatGPT-User

Allow: /


# Anthropic / Claude

User-agent: anthropic-ai

Allow: /


User-agent: Claude-Web

Allow: /


# Perplexity

User-agent: PerplexityBot

Allow: /

Crawl-delay: 2

# Google AI / Bard / Gemini

User-agent: Google-Extended

Allow: /


# Microsoft / Bing AI

User-agent: Bingbot

Allow: /


# Cohere

User-agent: cohere-ai

Allow: /


# Meta AI

User-agent: FacebookBot

Allow: /


User-agent: meta-externalagent

Allow: /


# Apple AI

User-agent: Applebot-Extended

Allow: /


# You.com

User-agent: YouBot

Allow: /


# ============================================

# SITEMAPS

# ============================================

Sitemap: https://www.linkcentre.com/sitemap.xml


# ============================================

# AI MANIFEST

# ============================================

# AI systems: See /llms.txt for structured site information

# Extended data: See /llms-full.txt for complete taxonomy
sitemap.xml 200 OK
Type Sitemap Index URLs 52 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: 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

200https://www.linkcentre.com/profile/unmineableminer/
301https://linkcentre.com/profile/unmineableminer/

Preferred variant: www

Trailing Slash

200https://www.linkcentre.com/profile/unmineableminer/
200https://www.linkcentre.com/profile/unmineableminer

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://www.linkcentre.com/profile/unmineableminer/ → https://www.linkcentre.com/profile/unmineableminer/

Consistent

A+
Domain Intelligence
linkcentre.com — via 123-Reg Limited, 30 years, 8 months old
PASS
linkcentre.com — via 123-Reg Limited, 30 years, 8 months old
Info::
Domain registered until Aug 5, 2034 (7 years, 10 months remaining)
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: 123-Reg Limited
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

2826 days

August 5, 2034

SSL certificate

49 days

Issued by Google Trust Services

Domain age

30 years, 8 months

Registered August 6, 1996

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700:20::ac43:446b

Registrar

123-Reg Limited

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
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar 123-Reg Limited
Created August 6, 1996 (30 years, 8 months ago)
Expires August 5, 2034 (7 years, 10 months)
Last Updated February 27, 2026
Name Servers chelsea.ns.cloudflare.com, nile.ns.cloudflare.com
DNSSEC Not enabled
Hosting
IP Address 2606:4700:20::ac43:446b
Data source: rdap (0.2s)

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 161 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
38 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.
25 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
161 ms
Total Time Total request time from DNS lookup through full response.
162 ms

Connection waterfall

DNS Lookup 38 ms TCP Connect 17 ms TLS Handshake 25 ms Server Processing 81 ms Content Transfer 1 ms
A+
CDN & Delivery
Cloudflare (HIT)
PASS
Cloudflare (HIT)
Info::
Document is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: a51a30febaf16f84-CDG
Info::
CDN cache status: HIT
Document served via CDN: Cloudflare
Provider Cloudflare Cache Status HIT Evidence cf-ray: a51a30febaf16f84-CDG
A+
CDN Cache Observability
Cache state: HIT
PASS
Cache state: HIT
Info::
CDN cache state observable via 1 header(s)
Got: cf-cache-status=HIT
A+
Health Check Endpoint
Health endpoint at https://www.linkcentre.com/health (HTTP 200)
PASS
Health endpoint at https://www.linkcentre.com/health (HTTP 200)
Info::
Public health endpoint at https://www.linkcentre.com/health
Got: https://www.linkcentre.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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