Skip to content
https://cardiff.ac.uk

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
81
GRADE
B
FIX
0
REVIEW
5
PASS
4
INFO
0
Probed from Amsterdam, Netherlands
302 Found
Checks
9
4 PASS 5 REVIEW
B
Redirect Chain
1 redirect(s), 1107 ms total
REVIEW
1 redirect(s), 1107 ms total
Info::
Single redirect
Got: https://cardiff.ac.uk → https://www.cardiff.ac.uk/ (302)
Info::
WWW normalization redirect
Info::
Uses 302 (temporary) redirect
If permanent, use 301 instead.
Got: https://cardiff.ac.uk
Warning::
Redirect overhead: 1107 ms total
Got: 1107 ms

https://cardiff.ac.uk

25 ms · HTTP/1.1

302

https://www.cardiff.ac.uk/

1082 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://cardiff.ac.uk30225 msHTTP/1.1cloudflare
2https://www.cardiff.ac.uk/2001082 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

If permanent, use 301 instead.

Why this matters

302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.

Learn more ▾

Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).

Source: Google Search Central

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

C
URL Variants
Action
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
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

200https://www.cardiff.ac.uk/
200https://cardiff.ac.uk/

Inconsistent — duplicate content risk

HTTP → HTTPS

302http://cardiff.ac.uk/ → https://www.cardiff.ac.uk/

Use 301 (permanent) instead of 302 (temporary)

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

Certificate validity

72
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::
Site is served via Cloudflare CDN (edge: AMS)
Got: cf-ray: 9f07d7c90b3fe459-AMS
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9f07d7c90b3fe459-AMS
A+
DNS Records
1 A records, 17 ms lookup
PASS
1 A records, 17 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 43.245.41.93
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
3 nameserver(s) configured
Got: mnetidns02.cf.ac.uk, mnetidns01.cf.ac.uk, ns3.ja.net
Info::
1 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: 17 ms
Got: 17 ms
A43.245.41.93
AAAA—
CNAME—
NSmnetidns02.cf.ac.uk, mnetidns01.cf.ac.uk, ns3.ja.net
MX
10 cardiff-ac-uk.mail.protection.outlook.com
TXT
jamf-site-verification=fiJ21dyTPxbz2kuan-koug
brevo-code:b1414e0a234265a2faa294058248ae06
status-page-domain-verification=hrzwwly13154
apple-domain-verification=NbEwtmT6hcPnGnVO
ZOOM_verify_fk2IZ3SKRBmGp5m6sHVqfg
google-site-verification=y55qRmPnOfOEjDn1ect33N7RjDojRIBlPr4lwOChpaI
adobe-idp-site-verification=c4a9be911363d9cdaebfcc10a4bb4eb3e9a8c90aea795fdceed4...
atlassian-domain-verification=JwFo985Fwacc64ycQuyJNewXM/BdYVD0/OqMLTjYgMgtOdxhhX...
3aa27263-a39c-4b83-96ec-ac4a13a2c063_181018
SPF v=spf1 include:spf.protection.outlook.com exists:%{ir}.%{v}.arpa.spf.cardiff.ac....
apple-domain-verification=gK5DniqbL9kS4pU0
Sendinblue-code:83c2a808a21295ed99f9ff729927bdfc
MS=ms27684705
QuoVadis=521a2895-5f43-41b0-b8f6-adfd952d0d5f
miro-verification=44e9ba1b8cc5ac919294d1c66dd64f49dd9c6518
mentimeter-7a8c27b2-9695-44ab-9a3f-f1e8850c4c67
CAALookup not available with standard resolver
Resolved in 17 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

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+
Crawlability
robots.txt present, sitemap with 7 URLs
PASS
robots.txt present, sitemap with 7 URLs
Info::
robots.txt is present
Got: 390 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 7 entries
Info::
Sitemap index with 7 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 390 B Sitemaps referenced 1 User-agents *, Sogou web spider Blocking No — crawling allowed
User-agent: *
Sitemap: https://www.cardiff.ac.uk/sitemap.xml
Disallow: /master/
Disallow: /V2Vic2l0ZSBDb250ZW50V2Vic2l0ZSBDb250ZW50/
Disallow: /V2Vic2l0ZSBDb250ZW50/
Disallow: /cy/V2Vic2l0ZSBDb250ZW50V2Vic2l0ZSBDb250ZW50/
Disallow: /cy/V2Vic2l0ZSBDb250ZW50/
Disallow: /_content/
Disallow: /search
Disallow: /cy/search
Disallow: /cookie-yes
User-agent: Sogou web spider
Disallow: /cy/study/*
sitemap.xml 200 OK
Type Sitemap Index URLs 7 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
cardiff.ac.uk — via No registrar listed. This domain is directly registered with Nominet., hosted on SQUIZ-AS-AP Squiz Pty Ltd, AU
PASS
cardiff.ac.uk — via No registrar listed. This domain is directly registered with Nominet., hosted on SQUIZ-AS-AP Squiz Pty Ltd, AU
Info::
Registrar: No registrar listed. This domain is directly registered with Nominet.
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: SQUIZ-AS-AP Squiz Pty Ltd, AU
Got: AS55532
Domain expiry

Unknown

SSL certificate

72 days

Issued by Let's Encrypt

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

SQUIZ-AS-AP Squiz Pty Ltd, AU

ASN AS55532

43.245.41.93

Registrar

No registrar listed. This domain is directly registered with Nominet.

Unlocked 7 NS records
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar No registrar listed. This domain is directly registered with Nominet.
Name Servers ns0.ja.net, ns2.ja.net, ns3.ja.net, ns4.ja.net, auth03.ns.uu.net, ns1.surfnet.nl, dns-3.dfn.de
Registrant The JNT Association
Hosting
IP Address 43.245.41.93
ASN AS55532 (SQUIZ-AS-AP Squiz Pty Ltd, AU)
Provider SQUIZ-AS-AP Squiz Pty Ltd, AU
Data source: whois (0.7s)

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 45 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.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
7 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
46 ms
Total Time Total request time from DNS lookup through full response.
46 ms

Connection waterfall

DNS Lookup 35 ms TCP Connect 1 ms TLS Handshake 7 ms Server Processing 2 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.

Send Feedback