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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
82
GRADE
B
FIX
3
REVIEW
1
PASS
5
INFO
0
Probed from Santa Clara, United States
302 Found
Checks
9
5 PASS 1 REVIEW 3 FIX
D
Redirect Chain
Action
2 redirect(s), 1699 ms total
FIX
2 redirect(s), 1699 ms total
Warning::
2 redirects before reaching final URL
Each redirect adds latency. Try to minimize the chain to 1 hop.
Info::
WWW normalization redirect
Info::
Uses 302 (temporary) redirect
If permanent, use 301 instead.
Got: https://uibk.ac.at
Warning::
Redirect overhead: 1699 ms total
Got: 1699 ms

https://uibk.ac.at

670 ms · HTTP/1.1

302

https://www.uibk.ac.at/

847 ms · HTTP/1.1

302

https://www.uibk.ac.at/de/

182 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://uibk.ac.at302670 msHTTP/1.1Apache
2https://www.uibk.ac.at/302847 msHTTP/1.1Apache
3https://www.uibk.ac.at/de/200182 msHTTP/1.1Apache

See the visual redirect chain in the HTTP Probe tab →

Each redirect adds latency. Try to minimize the chain to 1 hop.

Why this matters

Redirect chain — each hop adds latency; combine into one redirect where possible.

Source: Google Search Central / web.dev

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

D
TLS Certificate Expiry & Recommendations
Action
12 days until leaf cert expires — 5 issues to address
FIX

Certificate validity

12
days left
0d 30d 60d 90d+
Renew urgently — under 14 days remaining

Recommended actions

  • Renew certificate — 12 days remaining
  • Add includeSubDomains to the HSTS directive
  • 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
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

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

A
DNS Records
1 A records, 324 ms lookup
PASS
1 A records, 324 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 138.232.17.234
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: ns1.uibk.ac.at, ns2.uibk.ac.at, ns5.univie.ac.at
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
Warning::
DNS resolution is slow (324 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 324 ms
A138.232.17.234
AAAA—
CNAME—
NSns1.uibk.ac.at, ns2.uibk.ac.at, ns5.univie.ac.at
MX
10 spam-nolisting.uibk.ac.at
15 mx1.uibk.ac.at
TXT
MS=0C63A58D5F28DB3F58B11408BFC6CEEEAAAC4CC5
SPF v=spf1 include:_spf.uibk.ac.at include:_spf_etermin.uibk.ac.at include:spf.press...
MS=ms10427399
cisco-ci-domain-verification=54ac4cd08bc91f35b70dc7ca8ecd7725b7ca1c7e74de0596e39...
CAALookup not available with standard resolver
Resolved in 324 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.

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

A+
Crawlability
robots.txt present, sitemap with 4 URLs
PASS
robots.txt present, sitemap with 4 URLs
Info::
robots.txt is present
Got: 2233 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 4 entries
Info::
Sitemap index with 4 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 2233 B Sitemaps referenced 1 User-agents SemrushBot, MJ12bot, AhrefsBot, UT-Dorkbot, *, Googlebot, Slurp, msnbot Blocking No — crawling allowed
Sitemap: https://www.uibk.ac.at/sitemap.xml


User-agent: Googlebot

Disallow: /*style=

Disallow: /*print=1

Disallow: /*contrast=1

Disallow: /*fontsize=1

Disallow: /*intranet/

Disallow: /*@

Disallow: /iza/lis-

Disallow: /lis-

Disallow: /www/*

Disallow: /*advanced_search=

Disallow: */test/

Disallow: */sandbox/

Disallow: /ub/pub_uibk	

Disallow: /ulb/pub_uibk	

Disallow: /ulb/ueber_uns/sowi/dyn

Disallow: /fakultaeten/technische-wissenschaften/archiv

Disallow: /scripts

Disallow: /stylesheets

Disallow: /search

Disallow: */admin/


User-agent: Slurp

Disallow: /*style=

Disallow: /*print=

Disallow: /*contrast=

Disallow: /*fontsize=

Disallow: /*252525

Disallow: /*intranet/

Disallow: /*@

Disallow: /iza/lis-

Disallow: /lis-

Disallow: /www/*

Disallow: /*advanced_search=

Disallow: */test/

Disallow: */sandbox/

Disallow: /ub/pub_uibk	

Disallow: /ulb/pub_uibk

Disallow: /ulb/ueber_uns/sowi/dyn

Disallow: /fakultaeten/technische-wissenschaften/archiv

Disallow: /scripts

Disallow: /stylesheets

Disallow: /search

Disallow: */admin/


User-agent: msnbot

Disallow: /*style=

Disallow: /*print=

Disallow: /*contrast=

Disallow: /*fontsize=

Disallow: /*intranet/

Disallow: /*@

Disallow: /iza/lis-

Disallow: /lis-

Disallow: /www/*

Disallow: /*advanced_search=

Disallow: */test/

Disallow: */sandbox/

Disallow: /ub/pub_uibk	

Disallow: /ulb/pub_uibk

Disallow: /ulb/ueber_uns/sowi/dyn

Disallow: /fakultaeten/technische-wissenschaften/archiv

Disallow: /scripts

Disallow: /stylesheets

Disallow: /search

Disallow: */admin/


User-agent: SemrushBot

Disallow: /


User-agent: MJ12bot

Disallow: / 


User-agent: AhrefsBot

Disallow: / 


User-agent: UT-Dorkbot

Disallow: /


User-agent: *

Disallow: /iza/lis-

Disallow: /lis-

Disallow: /www/*

Disallow: /*style=

Disallow: /*print=

Disallow: /*contrast=

Disallow: /*fontsize=

Disallow: /*advanced_search=

Disallow: */test/

Disallow: */sandbox/

Disallow: */intranet/

Disallow: /ub/pub_uibk	

Disallow: /ulb/pub_uibk

Disallow: /ulb/ueber_uns/sowi/dyn

Disallow: /fakultaeten/technische-wissenschaften/archiv

Disallow: /germanistik/histrom

Disallow: /scripts

Disallow: /stylesheets

Disallow: /search

Disallow: */admin/
sitemap.xml 200 OK
Type Sitemap Index URLs 4 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: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

302https://www.uibk.ac.at/
200https://uibk.ac.at/

Preferred variant: non-www

HTTP → HTTPS

301http://uibk.ac.at/ → https://www2.uibk.ac.at/

Consistent

A+
Domain Intelligence
uibk.ac.at — hosted on University of Innsbruck, AT
PASS
uibk.ac.at — hosted on University of Innsbruck, AT
Info::
Hosting: University of Innsbruck, AT
Got: AS1110
Domain expiry

Unknown

SSL certificate

12 days

Issued by Hellenic Academic and Research Institutions CA

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

University of Innsbruck, AT

ASN AS1110

138.232.17.234

Registrar

Registrar unknown

Lock status unknown 3 NS records
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the TLS certificate or verify auto-renewal is working
Registrar
Name Servers ns1.uibk.ac.at, ns2.uibk.ac.at, ns5.univie.ac.at
Registrant University of Innsbruck ZID
Hosting
IP Address 138.232.17.234
ASN AS1110 (University of Innsbruck, AT)
Provider University of Innsbruck, AT
Data source: whois (0.6s)
A
HTTP Probe Timing
Total 675 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
174 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
164 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
172 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
675 ms
Total Time Total request time from DNS lookup through full response.
675 ms

Connection waterfall

DNS Lookup 174 ms TCP Connect 164 ms TLS Handshake 172 ms Server Processing 164 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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