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https://penguin.co.uk

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
87
GRADE
B
FIX
0
REVIEW
4
PASS
5
INFO
0
Probed from Madrid, Spain
308 Permanent Redirect
Checks
9
5 PASS 4 REVIEW
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
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 301-redirects to HTTPS

www / non-www

200https://www.penguin.co.uk/
200https://penguin.co.uk/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://penguin.co.uk/ → https://penguin.co.uk/

Consistent

B
TLS Certificate Expiry & Recommendations
60 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

60
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 (BYPASS)
REVIEW
Cloudflare (BYPASS)
Info::
Site is served via Cloudflare CDN (edge: MAD)
Got: cf-ray: 9f073c44ce64cbc7-MAD
Info::
CDN cache status: BYPASS
CDN Detected: Cloudflare
Provider Cloudflare Cache Status BYPASS Evidence cf-ray: 9f073c44ce64cbc7-MAD
A+
DNS Records
2 A records, 29 ms lookup
PASS
2 A records, 29 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 141.193.213.31, 141.193.213.30
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1853.awsdns-39.co.uk, ns-755.awsdns-30.net, ns-464.awsdns-58.com, ns-1144.awsdns-15.org
Info::
2 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 29 ms
Got: 29 ms
A141.193.213.31, 141.193.213.30
AAAA—
CNAME—
NSns-1853.awsdns-39.co.uk, ns-755.awsdns-30.net, ns-464.awsdns-58.com, ns-1144.awsdns-15.org
MX
10 eu-smtp-inbound-1.mimecast.com
10 eu-smtp-inbound-2.mimecast.com
TXT
_2jsmg3e4uio2zdzx5fxlj7ovvrovb2b
hj-ownership=WbEZ56d45Ab1
SPF v=spf1 ip4:62.172.191.128/25 ip4:185.35.48.34/32 ip4:185.35.50.163/32 include:sp...
MS=ms13089908
R0A0N20129
google-site-verification=lWxupnM-BErxJWWRSvPbEJdkUOa4NLceB-3ZKUCLNjM
facebook-domain-verification=jjz9ht0lm6cves7ayoki0rf14qodlr
CAALookup not available with standard resolver
Resolved in 29 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A
Redirect Chain
1 redirect(s), 324 ms total
PASS
1 redirect(s), 324 ms total
Info::
Single redirect
Got: https://penguin.co.uk → https://www.penguin.co.uk (308)
Info::
WWW normalization redirect

https://penguin.co.uk

244 ms · HTTP/1.1

308

https://www.penguin.co.uk

80 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://penguin.co.uk308244 msHTTP/1.1cloudflare
2https://www.penguin.co.uk20080 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 25 URLs
PASS
robots.txt present, sitemap with 25 URLs
Info::
robots.txt is present
Got: 383 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 25 entries
Info::
Sitemap index with 25 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 383 B Sitemaps referenced 1 User-agents Avengineers-Crawler, * Blocking No — crawling allowed
User-agent: Avengineers-Crawler
Disallow: /

User-agent: *
Allow: /

# Directories
Disallow: /api/*
Disallow: /preview/*

# Paths (no clean URLs)
Disallow: /*.php$
Disallow: /*?p=*&
Disallow: /*search-results?q=*
Disallow: /*search-results?imprint*
Disallow: /*search-results.html?q=*
Disallow: */wp-admin/*
Disallow: /*?resize=*

Sitemap: https://www.penguin.co.uk/sitemap_index.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 25 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
penguin.co.uk — via CSC Corporate Domains, Inc [Tag = CSC-CORP-DOMAINS], hosted on Cloudflare
PASS
penguin.co.uk — via CSC Corporate Domains, Inc [Tag = CSC-CORP-DOMAINS], hosted on Cloudflare
Info::
Domain registered until Sep 10, 2026 (4 months remaining)
Info::
Registrar: CSC Corporate Domains, Inc [Tag = CSC-CORP-DOMAINS]
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: AS209242
Domain expiry

86 days

September 10, 2026

SSL certificate

60 days

Issued by Let's Encrypt

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS209242

141.193.213.30

Registrar

CSC Corporate Domains, Inc [Tag = CSC-CORP-DOMAINS]

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the domain or enable auto-renewal to prevent accidental expiry
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar CSC Corporate Domains, Inc [Tag = CSC-CORP-DOMAINS]
Expires September 10, 2026 (4 months)
Last Updated September 6, 2025
Name Servers ns-1144.awsdns-15.org, ns-1853.awsdns-39.co.uk, ns-464.awsdns-58.com, ns-755.awsdns-30.net
Hosting
IP Address 141.193.213.30
ASN AS209242 (CLOUDFLARESPECTRUM Cloudflare, Inc., US)
Provider Cloudflare
Data source: whois (0.8s)

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

Connection waterfall

DNS Lookup 28 ms TCP Connect 1 ms TLS Handshake 12 ms Server Processing 94 ms Content Transfer 0 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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