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https://wustl.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
89
GRADE
B
FIX
0
REVIEW
2
PASS
7
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
7 PASS 2 REVIEW
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
TLS Certificate Expiry & Recommendations
75 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

75
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, 759 ms lookup
PASS
1 A records, 759 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 23.185.0.3
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
5 nameserver(s) configured
Got: ns03.ip.wustl.edu, ns04.ip.wustl.edu, ns01.ip.wustl.edu, ns02.ip.wustl.edu, ns00.ip.wustl.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 (759 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 759 ms
A23.185.0.3
AAAA—
CNAME—
NSns03.ip.wustl.edu, ns04.ip.wustl.edu, ns01.ip.wustl.edu, ns02.ip.wustl.edu, ns00.ip.wustl.edu
MX
10 smtp4.mx.wustl.edu
10 smtp3.mx.wustl.edu
10 smtp1.mx.wustl.edu
10 smtp2.mx.wustl.edu
100 ms43096679.msv1.invalid.wustl.edu
TXT
SPF v=spf1 ip4:208.117.61.155 ip4:104.45.175.206 ip4:52.224.142.128 ip4:52.180.90.2...
brevo-code:47910dad859b8cc59016e254bfc2691e
google-site-verification=CmuLI-dvXn4RbwGrJw_y48JU0VNJvC4JkVm40hMZcGk
d365mktkey=2g70u9s8aufmjqsdjxl37doc
atlassian-domain-verification=OjbbFWJspitkuY5UWMr5n4JIpGduH5AWTFsmCjdBS9QcZPi/G/...
d365mktkey=14ctzuu12dg60ta62u04ddeuj
amazonses:0pWmZ3cKbqf2da7DCB2YeER7vVSvkINUjtqkIm9lYyk=
docusign=d3f36653-1429-4415-8fd6-3cf6b2bb2d7c
google-site-verification=avl1q9k6NW9ftWu-HBoYBg910KjxNWZntqy4Tc6Nn2c
google-site-verification=MvtpbllXOb63Yx9w3WFjWCZR-LHtnfAVgFJws-Ue9ME
brevo-code:3110c2b54ef2acb6b31aaf408aeefc9e
nintex.620bdcc911302c006955fe4f
openai-domain-verification=dv-XbW9dxs8Bp6zPyV8onDE3SzJ
anthropic-domain-verification-0qkk6p=jbzgYnLtp3OsUQ0cBYWxmPaaZ
status-page-domain-verification=cn9gsmct0vf9
google-site-verification=TPMv0_isU2jNt_jZ5lRSEhM6TlIftli_iiy40Kp-AwI
amazonses:yj+KjwcrLMmm/dD1esz1OfBmWPwcM+LHD0ZJGb0wMf8=
psgk4qeplqpgp492he3nkfdapg
ca3-af9ba2cddfb84114be9df0d86bb3726e
34155841A2508BECD5C798257267FBB80D13C966AA514413798D571EA23CDD21
openai-domain-verification=dv-0ZXAl1wPxHfZQzwz86vpRh0w
amazonses:5P6+gURez5gGPEvpi0/wfckAiqkC1YQQ8apk8eimtHU=
onetrust-domain-verification=fa333d481f5642dc9f675e5986b22c4c
google-site-verification=Mq4I7BGfm3L6R7e2IiBwWPzUgyf_ZSuv1pCStANKR58
google-site-verification=xCK6ole63K9XT94xG9frBzEK-MHggzGOQJyzZ3NngTw
af23hqem7r04ma4v14vgaihp42
DRXV5DYS8LIBHYFHQX71LXN02CM3U1I13WSDI82QU
brevo-code:0ee56f3223e39c9a2adc900ffc50f920
docusign=1b1a1c47-13e8-4a89-b0cc-ed1284d64a81
d365mktkey=7kdpn9nbfup2mhfxhlmmiqdxx
google-site-verification=5uUcdG0dg8qqYOAbQy9xGiPqtRcGK4yMdHa6wtVYl9M
CAALookup not available with standard resolver
Resolved in 759 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), 146 ms total
PASS
1 redirect(s), 146 ms total
Info::
Single redirect
Got: https://wustl.edu → https://washu.edu/ (301)
Info::
Cross-domain redirect detected

https://wustl.edu

6 ms · HTTP/1.1

301

https://washu.edu/

140 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://wustl.edu3016 msHTTP/1.1Pantheon
2https://washu.edu/200140 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 11 URLs
PASS
robots.txt present, sitemap with 11 URLs
Info::
robots.txt is present
Got: 241 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 241 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /wp/wp-admin/
Allow: /wp/wp-admin/admin-ajax.php

# START YOAST BLOCK
# ---------------------------
User-agent: *
Disallow:

Sitemap: https://washu.edu/sitemap_index.xml
# ---------------------------
# END YOAST BLOCK
sitemap.xml 200 OK
Type Sitemap Index URLs 11 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

301https://www.wustl.edu/
200https://wustl.edu/

Preferred variant: non-www

HTTP → HTTPS

301http://wustl.edu/ → https://washu.edu/

Consistent

A+
Domain Intelligence
wustl.edu — 38 years, 11 months old, hosted on Fastly
PASS
wustl.edu — 38 years, 11 months old, hosted on Fastly
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Info::
Hosting: Fastly
Got: AS54113
Domain expiry

410 days

July 31, 2027

SSL certificate

75 days

Issued by Let's Encrypt

Domain age

38 years, 11 months

Registered December 7, 1987

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Fastly

ASN AS54113

23.185.0.3

Registrar

Registrar unknown

Lock status unknown 5 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar
Created December 7, 1987 (38 years, 11 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated December 1, 2025
Name Servers ns01.ip.wustl.edu, ns00.ip.wustl.edu, ns03.ip.wustl.edu, ns04.ip.wustl.edu, ns02.ip.wustl.edu
Registrant Washington University in St. Louis
Hosting
IP Address 23.185.0.3
ASN AS54113 (FASTLY - Fastly, Inc., US)
Provider Fastly
Data source: whois (0.9s)
A+
HTTP Probe Timing
Total 141 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
135 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
0 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.
142 ms
Total Time Total request time from DNS lookup through full response.
142 ms

Connection waterfall

DNS Lookup 135 ms TCP Connect 0 ms TLS Handshake 4 ms Server Processing 2 ms Content Transfer 0 ms
A+
CDN & Delivery
Fastly (HIT)
PASS
Fastly (HIT)
Info::
Site is served via Fastly CDN
Got: x-served-by: cache-toj-leto2350050-TOJ
Info::
CDN cache status: HIT
CDN Detected: Fastly
Provider Fastly Cache Status HIT Evidence x-served-by: cache-toj-leto2350050-TOJ
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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