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https://ucsc.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
91
GRADE
A
FIX
1
REVIEW
2
PASS
6
INFO
0
Probed from Singapore, Singapore
301 Moved Permanently
Checks
9
6 PASS 2 REVIEW 1 FIX
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.

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.ucsc.edu/
200https://ucsc.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://ucsc.edu/ → https://ucsc.edu/

Consistent

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

Certificate validity

83
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
A
DNS Records
1 A records, 1255 ms lookup
PASS
1 A records, 1255 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 37.16.20.230
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2a09:8280:1::42:42ec:0
Info::
3 nameserver(s) configured
Got: ns.zocalo.net, adns2.ucsc.edu, adns1.ucsc.edu
Info::
5 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 (1255 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 1255 ms
A37.16.20.230
AAAA2a09:8280:1::42:42ec:0
CNAME—
NSns.zocalo.net, adns2.ucsc.edu, adns1.ucsc.edu
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
TXT
sending_domain1048611=42e1dff1f7750da727e684cc0fff85782d9236257a3e7e03409e658b8c...
SPF v=spf1 include:_spf.mlsend.com include:_spf.google.com ip4:66.85.64.0/23 ip4:66...
dtm-domain-verification=rC0pX3ESCPq-6oxgeeXR7bZxSbwXhtsGMOPkdyM2hCE
google-site-verification=b3tRHeWaOAfxcEB0rCMXu_kfVSZB5O1sAJUXwQMlXY8
jamf-site-verification=Jl1UW-gVKdRe1z4RQepaSQ
google-site-verification=YqGdNoAzlHV5CA2ymYS-eRmxx0p2inj3w_ZHzxYKcR4
google-site-verification=9ihceAEfByq2aXDNn377UMW-tKjSuBwvmeEElF0Nagc
google-site-verification=MAYcPln8bHyLVcZSoij9rWOtqe6TA0zWvPLwr5x-lBg
google-site-verification=hTFQkUsHT0UnNiY0UlB9FE640Fw61mIcQTzjhHwvMvw
google-site-verification=qjSZFDGXMoROf_06GrfaDCGOxKhGwIZWPy1JyvuFPQg
MS=BBDA09048FF123AA4DE4F66003797504E47CD473
9O98HIXRENZDBS4B49HG3EGSGUMD1SB71E1OLS1WG
docusign=92d2ff42-85b4-49d3-a7d4-ff6206c6b7da
atlassian-domain-verification=LT04D8PQ6rZDOYwwtkO66srjecUfj6tf1GAHT3MwwC9wt9hRhz...
amazonses:OLdo8B8RSoAxJeaMNhByxa+OHC80Gzqzze41wXllhgE=
apple-domain-verification=XO9icURQtTK4967R
2o4e1vfscfmdnoc50n5n46n340
virtru-site-verify=PbFPJQrlhOQuDphjnRmvQBT7NLpufe9o8IIjwsUb
google-site-verification=YKp9SeXigjb7PuNbHQlI53u7up6azjlipnWnMcQDl8A
atlassian-domain-verification=o4jKqspwzy6t1dhudUEPmQkJQXHUCdA4N1FBCLN2EU345AFSuN...
brevo-code:22a68b537c51751441d18a254169d3ff
atlassian-sending-domain-verification=3e2c66df-563a-4582-96d2-4644733430b9
CAALookup not available with standard resolver
Resolved in 1255 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
Redirect Chain
1 redirect(s), 627 ms total
PASS
1 redirect(s), 627 ms total
Info::
Single redirect
Got: https://ucsc.edu → https://www.ucsc.edu (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 627 ms total
Got: 627 ms

https://ucsc.edu

402 ms · HTTP/1.1

301

https://www.ucsc.edu

225 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://ucsc.edu301402 msHTTP/1.1Fly/6db5e6d7a8 (2026-04-20)
2https://www.ucsc.edu200225 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2a09:8280:1::42:42ec:0
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a09:8280:1::42:42ec:0 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 6 URLs
PASS
robots.txt present, sitemap with 6 URLs
Info::
robots.txt is present
Got: 113 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 6 entries
Info::
Sitemap index with 6 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 113 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php

Sitemap: https://www.ucsc.edu/wp-sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 6 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
ucsc.edu — 39 years, 9 months old
PASS
ucsc.edu — 39 years, 9 months old
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Domain expiry

410 days

July 31, 2027

SSL certificate

83 days

Issued by Let's Encrypt

Domain age

39 years, 9 months

Registered January 29, 1987

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2a09:8280:1::42:42ec:0

Registrar

Registrar unknown

Lock status unknown 3 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar
Created January 29, 1987 (39 years, 9 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated April 10, 2026
Name Servers adns2.ucsc.edu, adns1.ucsc.edu, ns.zocalo.net
Registrant University of California, Santa Cruz
Hosting
IP Address 2a09:8280:1::42:42ec:0
Data source: whois (1.4s)
A
HTTP Probe Timing
Total 402 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
219 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.
4 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
403 ms
Total Time Total request time from DNS lookup through full response.
403 ms

Connection waterfall

DNS Lookup 219 ms TCP Connect 1 ms TLS Handshake 4 ms Server Processing 179 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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