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https://ou.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
77
GRADE
C
FIX
1
REVIEW
6
PASS
2
INFO
0
Probed from Singapore, Singapore
301 Moved Permanently
Checks
9
2 PASS 6 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), 1755 ms total
REVIEW
1 redirect(s), 1755 ms total
Info::
Single redirect
Got: https://ou.edu → https://www.ou.edu/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 1755 ms total
Got: 1755 ms

https://ou.edu

908 ms · HTTP/1.0

301

https://www.ou.edu/

847 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://ou.edu301908 msHTTP/1.0BigIP
2https://www.ou.edu/200847 msHTTP/1.1Apache/2.4.6 (Red Hat Enterprise Linux) OpenSSL/1.0.1e-fips Communique/4.3.5 mod_fcgid/2.3.9

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
Crawlability
no robots.txt, no sitemap
REVIEW
no robots.txt, no sitemap
Info::
No robots.txt found
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
Info::
No sitemap.xml found
A sitemap helps search engines discover and index your pages more efficiently.

robots.txt is optional but recommended. It tells search engine crawlers which pages to index.

Why this matters

No robots.txt — crawlers fetch /robots.txt and get 404; not breaking but means default crawl behavior with no directives or sitemap reference.

Learn more ▾

A minimal robots.txt with `User-agent: * / Allow: / / Sitemap: https://example.com/sitemap.xml` covers the basics. Without it, crawlers behave fine but lose the sitemap signal and can't be selectively blocked from crawl-traps.

Source: robotstxt.org

A sitemap helps search engines discover and index your pages more efficiently.

Why this matters

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

robots.txt No robots.txt found

No robots.txt found

This is fine for most sites — a missing robots.txt allows all crawling by default.

sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

C
URL Variants
Action
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
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

200https://www.ou.edu/
200https://ou.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

302http://ou.edu/ → https://ou.edu/

Use 301 (permanent) instead of 302 (temporary)

B
HTTP Probe Timing
Total 918 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
5 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
227 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
459 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
918 ms
Total Time Total request time from DNS lookup through full response.
918 ms

Connection waterfall

DNS Lookup 5 ms TCP Connect 227 ms TLS Handshake 459 ms Server Processing 227 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
352 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

352
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • 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, 16 ms lookup
PASS
1 A records, 16 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 156.110.247.18
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1284.awsdns-32.org, ns-1598.awsdns-07.co.uk, ns-472.awsdns-59.com, ns-937.awsdns-53.net
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
Info::
DNS resolution time: 16 ms
Got: 16 ms
A156.110.247.18
AAAA—
CNAME—
NSns-1284.awsdns-32.org, ns-1598.awsdns-07.co.uk, ns-472.awsdns-59.com, ns-937.awsdns-53.net
MX
10 mxb-00272701.gslb.pphosted.com
10 mxa-00272701.gslb.pphosted.com
TXT
+zWEfgkvA2j9fHHBKPVE4qyt9uyD85oFlNynjfase5hvZlAnYbCXGlpU3uw/YWjw29sso+Ld9IUjDBQh...
19b2wwr3n8zyh5ppcyqgc2n9pwszbvch
208.75.123.0/24
4ebp5mps69vnmnnm00pq3ak046
AppID=0000000048019867
LCTr/F0hImTjsnYw6pt9Jg6TWBOcfqK+3qeJYgsQ+bpkyiTfaix8+0YKXRV/VTHUIt2BZtBnra+Eza6G...
MS=ms47553681
MS=ms95193120
ZOOM_verify_6gDEToiHTCmY38NbmZzkzA
adobe-idp-site-verification=6ba3e6ad-d322-435f-b2ea-efa73549fd04
amazonses:6a65aisx1XSyBKQ17qrGnQGvL0ZCs9I5Rq9LME9rqWY=
apple-domain-verification=K0MYiQ2cpU5b71eM
autodesk-domain-verification=N4NfpymhDwdHr4XMV8FB
beam-verification=tO9eASrtnwOX0k5Pt87mwtRwTJPncRbHQznFi2MbavFkVccZ
cisco-ci-domain-verification=2e8593a1e97e6ee3e9e53c4192da8d2fc3c38fff45292480c92...
dell-technologies-domain-verification=ou.edu_f4eb63d7-ca68-4b9c-8886-aed9c0d2a46...
docusign=05e90101-723f-479f-af27-de27e85d8f98
docusign=8de025f0-7002-4f33-81c9-b99876e9dd6f
google-site-verification=B1XtiPZn3KBonENNqC3PRDjD5AlcbiA3syfJY2R1RlA
google-site-verification=EMTIg5uKXGXbCBa5000kcqYhYMkZbHKDuyyCAZZqX38
google-site-verification=Ta7bq2QHLFrKjjFUjdm4DXkV8K3wN56S5mdMEY5CwO8
infoblox-domain-mastery=67f7995c22bb4be1835f541279da44c14afc894a3485c4132ad3b48b...
knowbe4-site-verification=c5d493be36393b1b48e67e6d904010e2
onetrust-domain-verification=ed5aafe61b1a42deb87c19be18cfd4c2
pardot_139971_*=262d8f2660b45fe1196819eb9ca51f259fa772e1c40148014eda80bfb1a37c21
SPF v=spf1 include:spf.protection.outlook.com include:_tuf-spf.touchnet.com include:...
CAALookup not available with standard resolver
Resolved in 16 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.

A+
Domain Intelligence
ou.edu — 30 years, 11 months old, hosted on OUHSC-EDU - University of Oklahoma HSC, US
PASS
ou.edu — 30 years, 11 months old, hosted on OUHSC-EDU - University of Oklahoma HSC, US
Info::
Domain registered until Jul 31, 2026 (3 months remaining)
Info::
Hosting: OUHSC-EDU - University of Oklahoma HSC, US
Got: AS16922
Domain expiry

13 days

July 31, 2026

SSL certificate

352 days

Issued by Internet2

Domain age

30 years, 11 months

Registered October 9, 1995

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

OUHSC-EDU - University of Oklahoma HSC, US

ASN AS16922

156.110.247.18

Registrar

Registrar unknown

Lock status unknown 4 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 October 9, 1995 (30 years, 11 months ago)
Expires July 31, 2026 (3 months)
Last Updated July 8, 2025
Name Servers ns-937.awsdns-53.net, ns-472.awsdns-59.com, ns-1284.awsdns-32.org, ns-1598.awsdns-07.co.uk
Registrant The University of Oklahoma
Hosting
IP Address 156.110.247.18
ASN AS16922 (OUHSC-EDU - University of Oklahoma HSC, US)
Provider OUHSC-EDU - University of Oklahoma HSC, US
Data source: whois (1.5s)
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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