Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
BCrawlabilityrobots.txt present, no sitemapREVIEW
A sitemap helps search engines discover and index your pages more efficiently.
No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.
Learn more ▾ ▴
A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.
Source: sitemaps.org / Google Search Central
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.
robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.
Source: sitemaps.org
User-agent: *
# Disallow: /
Disallow: /cgi-bin/
Allow: /local/INDEx-survey/
Allow: /local/INDEx-survey
Allow: /local/index-survey/
Allow: /local/index-survey
Disallow: /Local
Disallow: /local
Disallow: /solr
Disallow: /solr/TCD_All_Micro
Disallow: /migrated
#User-agent: BUbiNG
#Disallow: /
# Disallow access to all files in these directories
Disallow: /webdesign-projects
Disallow: /Webadmin
Disallow: /Astronomy
Disallow: /Physics/sure/
Disallow: /library/local/
Disallow: /Psychology/local
Disallow: /calendar/1415-2/
Disallow: /study/assets/content/
# Disallow access to these specific files
Disallow: /wip_index.php
No sitemap found
Adding a sitemap helps search engines discover your pages.
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations101 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
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
A+DNS Records2 A records, 35 ms lookupPASS
| A | 3.33.249.246, 15.197.242.139 |
| AAAA | — |
| CNAME | — |
| NS | auth-ns1.tcd.ie, auth-ns2.ucd.ie, auth-ns2.tcd.ie, auth-ns3.tcd.ie |
| MX | 10 tcd-ie.mail.protection.outlook.com |
| TXT | google-site-verification=UBheMj-WKimynXvOEXFLk1-PUd8B6S91wIea98PFIuA dell-technologies-domain-verification=tcd.ie_e68f91b5-b6b5-4a56-8196-a2821b60705... google-site-verification=535E0mjM6BC8LKGeWZPiDTUfBWWVRO6df5G5Gxz9CYE docusign=7a164078-c20a-4d3e-a1ce-87b780e3850e LS0wGCXdOiSqamEg/ogaY8TFrKtppR0sIAYcLNO7M38AoQDAXMqFhjVv3zazNI4Tb/BvzZONCn8xReir... brevo-code:70df7540dafa8ea20f0eccbc493bb5ae d365mktkey=jHusVOIxhFdqyiqVNzZIAZbf5JO9KYHH2xAmqQ4FhSAx klaviyo-site-verification=Tvbv8j docusign=08237f08-1bc7-4ced-866f-2f091ca1e091 amazonses:94slst6Hz90gKbyQVRj88Jrtkk//vCnWShfHzXbjfRU= SPF v=spf1 ip4:134.226.14.40 ip4:134.226.251.0/21 include:spf.protection.outlook.com... |
| CAA | Lookup not available with standard resolver |
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
ARedirect Chain1 redirect(s), 143 ms totalPASS
https://tcd.ie
100 ms · HTTP/1.1
https://www.tcd.ie:443/
43 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://tcd.ie | 301 | 100 ms | HTTP/1.1 | awselb/2.0 |
| 2 | https://www.tcd.ie:443/ | 200 | 43 ms | HTTP/1.1 | Apache |
See the visual redirect chain in the HTTP Probe tab →
A+Domain Intelligencetcd.ie — via HEAnet, 27 years old, hosted on AWSPASS
72 days
August 24, 2026
101 days
Issued by Hellenic Academic and Research Institutions CA
27 years
Registered August 23, 1999
Status unknown
Protects against DNS spoofing
AWS
ASN AS16509
15.197.242.139
HEAnet
Expiry timeline
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
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.
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