Skip to content
https://umd.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
90
GRADE
A
FIX
0
REVIEW
2
PASS
7
INFO
0
Probed from Santa Clara, United States
200 OK
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
73 days until leaf cert expires — 5 issues to address
REVIEW

Certificate validity

73
days left
0d 30d 60d 90d+

Recommended actions

  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • 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
A
DNS Records
1 A records, 435 ms lookup
PASS
1 A records, 435 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 94.247.142.1
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.umd.edu, ns.ums.edu, ns2.umd.edu
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 (435 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 435 ms
A94.247.142.1
AAAA—
CNAME—
NSns1.umd.edu, ns.ums.edu, ns2.umd.edu
MX
20 mx1.umd.iphmx.com
20 mx2.umd.iphmx.com
TXT
e2ma-verification=aaqab
e2ma-verification=xcqab
e2ma-verification=6yzbb
brevo-code:d71d84f4848e813d4acac38670ad3409
e2ma-verification=sujfb
e2ma-verification=tq1cb
e2ma-verification=xqlbb
e2ma-verification=eeefb
e2ma-verification=oc1cb
e2ma-verification=my1ab
brevo-code:d3c2d63793f4dd20304af345c67a8be4
e2ma-verification=ycqab
e2ma-verification=btfcb
e2ma-verification=yxpfb
e2ma-verification=oabgb
e2ma-verification=ydveb
e2ma-verification=u9xfb
e2ma-verification=nabgb
e2ma-verification=f7pab
e2ma-verification=rxycb
e2ma-verification=l5reb
e2ma-verification=99pab
e2ma-verification=ifycb
e2ma-verification=sdzcb
e2ma-verification=vlseb
e2ma-verification=m5reb
e2ma-verification=ecqab
e2ma-verification=k5reb
e2ma-verification=e0gfb
e2ma-verification=0cqab
e2ma-verification=wcqab
e2ma-verification=kwmbb
e2ma-verification=l81ab
e2ma-verification=n5reb
e2ma-verification=pgteb
e2ma-verification=s6ybb
e2ma-verification=6yzbb""
dell-technologies-domain-verification=umd.edu_6b285755-75ed-4037-bb55-7910d997b8...
atlassian-sending-domain-verification=ec03eaf2-7ed2-4d03-8333-820cad9e8a04
jamf-site-verification=q_evM9Go1nzKC2ruEDnURA
atlassian-domain-verification=jsp21SwhRd0VlqqwwG604raLVFkXj122oxaP875ixca1SyYNs2...
logmein-verification-code=t7A67XAYgXcWS1d2nVXr7Dl6K
brevo-code:d7c5ea407d5638e935306c41b6cf0c69
cursor-domain-verification-8sk7wz=1jFulrG3zid0VtQWYhZk8wrU4
perplexity-ai-domain-verification-hnmv8k=AYYgnLHsTOBvmlPYklcBZ2fiR
anthropic-domain-verification-2kekyx=Izdedg0KzNFDVDh88YGHCIyHI
ti2UA/gVAiO7gzONg0rdrMb6EOqcvvkfFTEbLj+egRTjB9H/rf0lfpBkf0NdaGjf9b4qrQq0xJcErwtM...
google-site-verification=2ZymRq4dY9_nbGLh9HhTm3Z5oBDEKi2yHyj9buDZmqc
5a5def2dc4b8766dcbc4d2da3349c68a1f60d470238c9ad2c43757470df5b14e
Dynatrace-site-verification=3b9984ff-fa43-4c6c-a412-a04c9311d963__39f5p55j2q7g71...
adobe-idp-site-verification=40a1e9b4-50fb-4c92-9399-1e76c80cdf87
google-site-verification=As2VzGueK-l938gHU7jCCGo0sAWM0eM7BulPwDSC0y0
atlassian-domain-verification=hCFSb4vDaH3FZG2/DNZjaj2dLt7Yo8BAte5sP586KyW4DvPyni...
sij7qofovndodvjgjhmgmkeof
google-site-verification=5uAJhrJvSIc6r3VJvDq27NdcbVU729HELEEZ0NTPG64
SPF v=spf1 exists:%{ir}.%{v}._spf.umd_spf.aws.umd.edu include:_spf.salesforce.com ~e...
ZOOM_verify_ew6uSDNaRmmn1nu_Ts6o3A
google-site-verification=FrrKt3ClQUFT5i_gwQAn-uQSoRI5Y_IpFExx1CmLOII
apple-domain-verification=SfiuCrELsUoPhmWU
fastly-domain-delegation-m4fSIJZih88QgWH5trzI-424811-08-05-2021
onetrust-domain-verification=66ba66b7aa304397ba0a1d4f6c96bc5f
adobe-idp-site-verification=0afdc0ecfe602686ab99e86db79056a241a666affe647a893924...
onetrust-domain-verification=a9c54d2106ba4d8f96921e94348534c7
facebook-domain-verification=lo5wiknocnhv9rxmhcau0qu15gcjfi
atlassian-sending-domain-verification=50a6f41d-d743-40ab-ba5e-e6d14af52f1b
google-site-verification=e9un135MdekFdfk_VicDDfCP9wi1jb8Wmkmk1DF6OfE
ZOOM_verify_6gxpRSmmeH1pxxUo5Higlu
google-site-verification=SVI8jDKaHI6P96SE07flUYUA2OCriIIOWiX-3a0RnEQ
e2ma-verification=04bgb
e2ma-verification=x1ffb
CAALookup not available with standard resolver
Resolved in 435 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
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://umd.edu

https://umd.edu

173 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://umd.edu200173 msHTTP/1.1cloudflare
A+
Crawlability
robots.txt present, sitemap with 11 URLs
PASS
robots.txt present, sitemap with 11 URLs
Info::
robots.txt is present
Got: 642 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 642 B Sitemaps referenced 1 User-agents *, GPTBot, Google-Extended, PerplexityBot Blocking No — crawling allowed
# robots.txt for https://umd.edu/

sitemap: https://umd.edu/sitemaps-1-sitemap.xml

    # live - don't allow web crawlers to index cpresources/ or vendor/

    User-agent: *
    Disallow: /cpresources/
    Disallow: /vendor/
    Disallow: /.env
    Disallow: /cache/


# Disallow ChatGPT bot, as there's no benefit to allowing it to index your site
User-agent: GPTBot
Disallow: /

# Disallow Google Bard and Vertex AI bots, as there's no benefit to allowing it to index your site
User-agent: Google-Extended
Disallow: /

# Disallow Perplexity bot, as there's no benefit to allowing it to index your site
User-agent: PerplexityBot
Disallow: /
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.umd.edu/
200https://umd.edu/

Preferred variant: non-www

HTTP → HTTPS

301http://umd.edu/ → https://umd.edu/

Consistent

A+
Domain Intelligence
umd.edu — 41 years, 3 months old, hosted on Cloudflare
PASS
umd.edu — 41 years, 3 months old, hosted on Cloudflare
Info::
Domain registered until Jul 31, 2026 (3 months remaining)
Info::
Hosting: Cloudflare
Got: AS209242
Domain expiry

45 days

July 31, 2026

SSL certificate

73 days

Issued by Let's Encrypt

Domain age

41 years, 3 months

Registered July 31, 1985

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS209242

94.247.142.1

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 July 31, 1985 (41 years, 3 months ago)
Expires July 31, 2026 (3 months)
Last Updated July 10, 2025
Name Servers ns1.umd.edu, ns2.umd.edu, ns.ums.edu
Registrant University of Maryland
Hosting
IP Address 94.247.142.1
ASN AS209242 (CLOUDFLARESPECTRUM Cloudflare, Inc., US)
Provider Cloudflare
Data source: whois (0.5s)
A+
HTTP Probe Timing
Total 306 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
70 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
3 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
10 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
306 ms
Total Time Total request time from DNS lookup through full response.
307 ms

Connection waterfall

DNS Lookup 70 ms TCP Connect 3 ms TLS Handshake 10 ms Server Processing 223 ms Content Transfer 1 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Site is served via Cloudflare CDN (edge: SJC)
Got: cf-ray: 9efeb6e9caa42c39-SJC
Info::
CDN cache status: DYNAMIC
CDN Detected: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: 9efeb6e9caa42c39-SJC
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback