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https://sc.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
200 OK
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.

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
robots.txt present, sitemap with 19969 URLs
REVIEW
robots.txt present, sitemap with 19969 URLs
Info::
robots.txt is present
Got: 1063 bytes
Info::
sitemap.xml is present
Warning::
sitemap.xml contains invalid XML
Search engines may not be able to parse the sitemap. Fix XML validation errors.
Info::
sitemap.xml contains 19969 entries
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.

Learn more ▾

Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.

Source: sitemaps.org / Google Search Central

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 1063 B Sitemaps referenced 0 User-agents SiteimproveBot-Crawler, Googlebot, PiplBot, *, Twitterbot, Facebot Blocking No — crawling allowed
User-agent: *
Disallow: ~
Disallow: /reports/   # server statistics
Disallow: /stats/   # server statistics
Disallow: /gifs/    # images
Disallow: /icon/    # images
Disallow: /icons/   # images
Disallow: /images/  # images
Disallow: /cgi-bin/ # cgi-bin
Disallow: /policies/athl200.pdf
Disallow: /policies/eop100.pdf
Disallow: /policies/hr178.pdf
Disallow: /policies/ppm/athl200.pdf
Disallow: /policies/ppm/eop100.pdf
Disallow: /policies/ppm/hr178.pdf
Disallow: /archives/
Disallow: /about/contact/unsubscribe/
Disallow: /*.xml$
Disallow: /*.inc$

# ARDC
Disallow: /ardc/sashtml/
Disallow: /ardc/saspdf/
# USC Test
Disallow: /usctest
# University Libraries
Disallow: /library/godort/
Disallow: /library/pubserv/ala/
Disallow: /library/pubserv/images/
Disallow: /library/pubserv/podreport/
Disallow: /library/pubserv/test/
Disallow: /library/pubserv/tutorial/
Disallow: /library/test/

User-agent: Twitterbot
Disallow:

User-agent: Facebot
Disallow:

User-agent: SiteimproveBot-Crawler
Disallow:

User-agent: Googlebot
Disallow:


User-agent: PiplBot
Disallow: /
sitemap.xml 200 OK
Type URL Set URLs 19969 entries Valid XML No
Sample URLs:
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.sc.edu/
200https://sc.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

302http://sc.edu/ → https://sc.edu

Use 301 (permanent) instead of 302 (temporary)

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

Certificate validity

349
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, 37 ms lookup
PASS
1 A records, 37 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 129.252.90.108
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: ns1.dnsmadeeasy.com, ns0.dnsmadeeasy.com, ns3.dnsmadeeasy.com, ns4.dnsmadeeasy.com, ns2.dnsmadeeasy.com
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: 37 ms
Got: 37 ms
A129.252.90.108
AAAA—
CNAME—
NSns1.dnsmadeeasy.com, ns0.dnsmadeeasy.com, ns3.dnsmadeeasy.com, ns4.dnsmadeeasy.com, ns2.dnsmadeeasy.com
MX
0 sc-edu.mail.protection.outlook.com
TXT
google-site-verification=ekls4u67g6QphEqtCGpqTrBInnA0SydmSD_HCd0p2eM
SPF v=spf1 ip4:129.252.0.0/16 include:_spft.sc.edu -all
linkedin-site-verification=453e6c2d-03ef-4827-9cb6-6f0369ce738e
atlassian-sending-domain-verification=6aee971f-5506-497b-a8f1-fb3ecd88fc9f
openai-domain-verification=dv-MelILy0AUJpf7iOcc0QYxe2w
google-site-verification=xG0vWO54rDLukzexYlavTtbo0XEKqCEchreW3W4I8Dg
google-site-verification=GqxyPJid1MMv0C-nF0ahyvMBGihtBPLHZs-dkrKh1t4
pardot872621=0228e27cecc5c0e53a1c5439e86ea1eebb8cde3245fc7bad3a304b4d17cb82cf
cise/6QtiEsWgXiXDJ2Ryqdpz95K5Qb1iMNQj/Ctr1zy9T/aGem7h43Dx96r46wc0T9At1Efs/SwLvHJ...
facebook-domain-verification=arr5zcnzgernv7omu8t82i58i0meee
CAALookup not available with standard resolver
Resolved in 37 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
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://sc.edu

https://sc.edu

360 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://sc.edu200360 msHTTP/1.1Apache/2.4.37 (Red Hat Enterprise Linux) OpenSSL/1.1.1k
A+
Domain Intelligence
sc.edu — 31 years, 6 months old, hosted on SC-AS - University of South Carolina, US
PASS
sc.edu — 31 years, 6 months old, hosted on SC-AS - University of South Carolina, US
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Info::
Hosting: SC-AS - University of South Carolina, US
Got: AS12005
Domain expiry

412 days

July 31, 2027

SSL certificate

349 days

Issued by Internet2

Domain age

31 years, 6 months

Registered March 7, 1995

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

SC-AS - University of South Carolina, US

ASN AS12005

129.252.90.108

Registrar

Registrar unknown

Lock status unknown 5 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar
Created March 7, 1995 (31 years, 6 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated March 16, 2026
Name Servers ns0.dnsmadeeasy.com, ns3.dnsmadeeasy.com, ns4.dnsmadeeasy.com, ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com
Registrant University of South Carolina
Hosting
IP Address 129.252.90.108
ASN AS12005 (SC-AS - University of South Carolina, US)
Provider SC-AS - University of South Carolina, US
Data source: whois (1.1s)
A
HTTP Probe Timing
Total 650 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
27 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
112 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
115 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
366 ms
Total Time Total request time from DNS lookup through full response.
650 ms

Connection waterfall

DNS Lookup 27 ms TCP Connect 112 ms TLS Handshake 115 ms Server Processing 113 ms Content Transfer 285 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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