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https://uiuc.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
97
GRADE
A+
FIX
1
REVIEW
1
PASS
7
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
7 PASS 1 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
TLS Certificate Expiry & Recommendations
230 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

230
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, 130 ms lookup
PASS
1 A records, 130 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 64.236.243.124
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: 2a01:111:f100:1002::4134:dc6d
Info::
3 nameserver(s) configured
Got: dns2.illinois.edu, dns3.illinois.edu, dns1.illinois.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
Info::
DNS resolution time: 130 ms
Got: 130 ms
A64.236.243.124
AAAA2a01:111:f100:1002::4134:dc6d
CNAME—
NSdns2.illinois.edu, dns3.illinois.edu, dns1.illinois.edu
MX
10 incoming-relays.illinois.edu
TXT
adobe-idp-site-verification={01d11a69-e4de-4f73-b476-5dc9b7faf76b}
SPF v=spf1 redirect=_spf.illinois.edu
CAALookup not available with standard resolver
Resolved in 130 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
Redirect Chain
1 redirect(s), 847 ms total
PASS
1 redirect(s), 847 ms total
Info::
Single redirect
Got: https://uiuc.edu → https://illinois.edu/ (301)
Info::
Redirect overhead: 847 ms total
Got: 847 ms
Info::
Cross-domain redirect detected

https://uiuc.edu

356 ms · HTTP/1.1

301

https://illinois.edu/

491 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://uiuc.edu301356 msHTTP/1.1Microsoft-Azure-Application-Gateway/v2
2https://illinois.edu/200491 msHTTP/1.1nginx/1.28.1

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (131 ms)
PASS
IPv6 reachable (131 ms)
Info::
IPv6 is configured and reachable at 2a01:111:f100:1002::4134:dc6d
Got: 131 ms connect
IPv6 Ready
AAAA Records 2a01:111:f100:1002::4134:dc6d Connection Reachable (131 ms)
A+
Crawlability
robots.txt present, sitemap with 3 URLs
PASS
robots.txt present, sitemap with 3 URLs
Info::
robots.txt is present
Got: 110 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 3 entries
Info::
Sitemap index with 3 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 110 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php

Sitemap: https://illinois.edu/sitemaps.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 3 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.uiuc.edu/
200https://uiuc.edu/

Preferred variant: non-www

HTTP → HTTPS

301http://uiuc.edu/ → https://illinois.edu/

Consistent

A+
Domain Intelligence
uiuc.edu — 41 years, 4 months old
PASS
uiuc.edu — 41 years, 4 months old
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Domain expiry

410 days

July 31, 2027

SSL certificate

230 days

Issued by Internet2

Domain age

41 years, 4 months

Registered July 18, 1985

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2a01:111:f100:1002::4134:dc6d

Registrar

Registrar unknown

Lock status unknown 3 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar
Created July 18, 1985 (41 years, 4 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated June 21, 2024
Name Servers dns2.illinois.edu, dns3.illinois.edu, dns1.illinois.edu
Registrant University of Illinois at Urbana Champaign
Hosting
IP Address 2a01:111:f100:1002::4134:dc6d
Data source: whois (0.6s)
A
HTTP Probe Timing
Total 474 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
127 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
115 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
117 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
474 ms
Total Time Total request time from DNS lookup through full response.
474 ms

Connection waterfall

DNS Lookup 127 ms TCP Connect 115 ms TLS Handshake 117 ms Server Processing 115 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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