Skip to content
https://utdallas.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
82
GRADE
B
FIX
1
REVIEW
4
PASS
4
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
4 PASS 4 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
Redirect Chain
1 redirect(s), 1023 ms total
REVIEW
1 redirect(s), 1023 ms total
Info::
Single redirect
Got: https://utdallas.edu → https://www.utdallas.edu/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 1023 ms total
Got: 1023 ms

https://utdallas.edu

348 ms · HTTP/1.1

301

https://www.utdallas.edu/

675 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://utdallas.edu301348 msHTTP/1.1openresty
2https://www.utdallas.edu/200675 msHTTP/1.1openresty

See the visual redirect chain in the HTTP Probe tab →

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

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.utdallas.edu/
200https://utdallas.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

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

Consistent

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

Certificate validity

56
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
2 A records, 408 ms lookup
PASS
2 A records, 408 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 3.21.250.42, 3.133.32.155
Info::
No IPv6 (AAAA) records
Info::
3 nameserver(s) configured
Got: nsphysex1.utdallas.edu, ns2.ots.utsystem.edu, nsflexex1.utdallas.edu
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
Warning::
DNS resolution is slow (408 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 408 ms
A3.21.250.42, 3.133.32.155
AAAA—
CNAME—
NSnsphysex1.utdallas.edu, ns2.ots.utsystem.edu, nsflexex1.utdallas.edu
MX
10 utdallas-edu.mail.protection.outlook.com
TXT
docusign=91982f58-004c-4538-9703-988284116cd1
jamf-site-verification=WTRoDC8G_4p4l5Ix5vRuaw
google-site-verification=OWq0usbjkJEnrnKbhaFQ-bUdEc0FrGfqxwRnDWEjcqg
TBU0WZUJUB8S1QI4AH2RS3EJVHWTH9LP0I4KQPWCR
airtable-verification=c976cad4ea8d7e718a1ca24eaa4410dc
docusign=e660e9bd-99d0-49e6-94f0-c9d59b12c156
uber-domain-verification=5eeab51a-ad73-4dbc-948e-7531b0b3e008
brevo-code:1c657d176e5e2a779e7b5f2dbde92fb7
KP8LjOvQAcnYLr/nf4m4oSobrmTPI+3qfaQRVCCYKiHPdFYgwfTfPoJqT2gDCDiijgy1B8KI5ImJ9vBR...
google-site-verification=Sia_GCYLtl1fbEHg77Rz0Aytda6kl1Ry3UMWiwtbINM
00D6A000001WJMm=1TBPE000000003F
v=DKIM1;k=rsa;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC6HV7lz4zmjrWpkcQRcMzIbL4E...
e2ma-verification=mhx
v=DKIM1;k=rsa;MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDdv88v7tCclW+Le2+dDoMcNrFQ4x...
facebook-domain-verification=gq2yziojjfs53pzmsvrftknl2hm0q6
SPF v=spf1 a:outgoing.utdallas.edu a:ex67spf.utdallas.edu a:ess18377spf.utdallas.edu...
2mpc0c0nr2e3suma7q92ira0cr
sending_domain391272=8803be69af1a6252a1c0387b1887ef79f43af54592d0045df7e238620fe...
google-site-verification=HLxqqaCfLh1DTGbLzkcrKzg8LQpynqAP9ny7pJzATvI
adobe-idp-site-verification=8365d904-5752-4697-8f47-46a8b4e01891
CAALookup not available with standard resolver
Resolved in 408 ms

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 11 URLs
PASS
robots.txt present, sitemap with 11 URLs
Info::
robots.txt is present
Got: 1344 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 11 entries
Info::
Sitemap index with 11 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1344 B Sitemaps referenced 1 User-agents *, ichiro, NaverBot, Baiduspider/2.0, +Baiduspider/2.0;++http://www.baidu.com/search/spider.html, Sosospider+, Googlebot-Image, Baiduspider-video, Baiduspider-image, Baiduspider+, +Baiduspider/2.0, sogou spider, Sosospider/2.0, Yandex, moget, Yeti, Baiduspider, Baiduspider+(+http://www.baidu.com/search/spider.htm), Mozilla/5.0(compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html), Baiduspider/2.0;+http://www.baidu.com/search/spider.html, +Baiduspider, sogou web spider, YoudaoBot, Sosospider, YisouSpider Blocking No — crawling allowed
User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php

Sitemap: https://www.utdallas.edu/wp-sitemap.xml

User-agent: *

Allow: /

Disallow: /women_in_stem/

Disallow: /scholarship-listing-test/
Crawl-delay: 30

User-agent: Yandex
Disallow: /

User-agent: moget
Disallow: /

User-agent: ichiro
Disallow: /

User-agent: NaverBot
Disallow: /

User-agent: Yeti
Disallow: /

User-agent: Baiduspider
Disallow: /

User-agent: Baiduspider-video
Disallow: /

User-agent: Baiduspider-image
Disallow: /

User-agent: Baiduspider+
Disallow: /

User-agent: Baiduspider+(+http://www.baidu.com/search/spider.htm)
Disallow: /

User-agent: Baiduspider/2.0;+http://www.baidu.com/search/spider.html
Disallow: /

User-agent: Baiduspider/2.0
Disallow: /

User-agent: +Baiduspider
Disallow: /

User-agent: +Baiduspider/2.0
Disallow: /

User-agent: +Baiduspider/2.0;++http://www.baidu.com/search/spider.html
Disallow: /

User-agent: Mozilla/5.0(compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)
Disallow: /

User-agent: sogou spider
Disallow: /

User-agent: sogou web spider
Disallow: /

User-agent: YoudaoBot
Disallow: /

User-agent: Sosospider
Disallow: /

User-agent: Sosospider/2.0
Disallow: /

User-agent: Sosospider+
Disallow: /

User-agent: YisouSpider
Disallow: /

User-agent: Googlebot-Image
Disallow: /wp-content/mu-plugins/
sitemap.xml 200 OK
Type Sitemap Index URLs 11 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
utdallas.edu — 37 years, 11 months old, hosted on AWS
PASS
utdallas.edu — 37 years, 11 months old, hosted on AWS
Info::
Domain registered until Jul 31, 2026 (3 months remaining)
Info::
Hosting: AWS
Got: AS16509
Domain expiry

47 days

July 31, 2026

SSL certificate

56 days

Issued by Let's Encrypt

Domain age

37 years, 11 months

Registered November 10, 1988

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

3.133.32.155

Registrar

Registrar unknown

Lock status unknown 3 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the domain or enable auto-renewal to prevent accidental expiry
Registrar
Created November 10, 1988 (37 years, 11 months ago)
Expires July 31, 2026 (3 months)
Last Updated September 3, 2025
Name Servers ns2.ots.utsystem.edu, nsflexex1.utdallas.edu, nsphysex1.utdallas.edu
Registrant University of Texas at Dallas
Hosting
IP Address 3.133.32.155
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: whois (0.9s)
A
HTTP Probe Timing
Total 509 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
153 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
118 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
119 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
510 ms
Total Time Total request time from DNS lookup through full response.
510 ms

Connection waterfall

DNS Lookup 153 ms TCP Connect 118 ms TLS Handshake 119 ms Server Processing 119 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