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.
BRedirect Chain2 redirect(s), 627 ms totalREVIEW
https://unipd.it
170 ms · HTTP/1.1
http://www.unipd.it/
113 ms · HTTP/1.1
https://www.unipd.it/
344 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://unipd.it | 301 | 170 ms | HTTP/1.1 | www.unipd.it |
| 2 | http://www.unipd.it/ | 301 | 113 ms | HTTP/1.1 | CloudFront |
| 3 | https://www.unipd.it/ | 200 | 344 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
Each redirect adds latency. Try to minimize the chain to 1 hop.
Redirect chain — each hop adds latency; combine into one redirect where possible.
Source: Google Search Central / web.dev
Redirect directly from https://unipd.it to https://www.unipd.it/
Redirect chain could be flattened to one hop — server config tweak removes intermediate latency.
Source: web.dev
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
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
CTLS Certificate Expiry & RecommendationsAction28 days until leaf cert expires — 5 issues to addressREVIEW
Certificate validity
Recommended actions
- Renew certificate — 28 days remaining
- Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
- Add includeSubDomains to the HSTS directive
- 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 Records1 A records, 131 ms lookupPASS
| A | 147.162.235.155 |
| AAAA | — |
| CNAME | — |
| NS | ns1.unipd.it, mail.dei.unipd.it, giotto.unipd.it, ns1.garr.net |
| MX | 1 ASPMX.L.GOOGLE.COM 5 ALT2.ASPMX.L.GOOGLE.COM 5 ALT1.ASPMX.L.GOOGLE.COM 10 ALT3.ASPMX.L.GOOGLE.COM 10 ALT4.ASPMX.L.GOOGLE.COM |
| TXT | google-site-verification=02vdy_QgcpMEFodh4KO6VmuDEcklf12UeK3fSZcrAJw MS=ms96273145 SPF v=spf1 ip4:147.162.10.0/24 ip4:147.162.51.107 ip4:147.162.51.108 ip4:130.186.31.... google-site-verification=47EiajtLymEiI8CvN-ClwVAoTll4qJJP9APh8FcK20M google-site-verification=V7lqiF8czJ0ZgZf0hoTFiavVrKdpMWpy4dgsBWx6HyQ openai-domain-verification=dv-faRECkx1pe6lup1QoU9AsbeP v6f2q2a2s8895v7pd9ql15mtso HARICA-i5qrKhz4rLaLor54YtI HARICA-YXn3g7N7pHZDnxZXQUP facebook-domain-verification=mfor9qn2yyv7tsr318kxjjvtop2w0k canva-site-verification=v7qZyXnI6idurMSHZBOwFg |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
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.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
ACrawlabilityrobots.txt present, sitemap with 0 URLsPASS
An empty sitemap provides no value. Add <url> entries for your pages.
An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.
Learn more ▾ ▴
Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.
Source: Google Search Central / sitemaps.org
User-Agent: *
Disallow: *
Sitemap: https://www.unipd.it/sitemap.xml
A+Domain Intelligenceunipd.it — via GARR-REG, 30 years, 8 months old, hosted on ASGARR Consortium GARR, ITPASS
229 days
January 29, 2027
28 days
Issued by Hellenic Academic and Research Institutions CA
30 years, 8 months
Registered January 29, 1996
Status unknown
Protects against DNS spoofing
ASGARR Consortium GARR, IT
ASN AS137
147.162.235.155
GARR-REG
Expiry timeline
Recommended actions
- Renew the TLS certificate or verify auto-renewal is working
- 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