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https://uct.ac.za

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
84
GRADE
B
FIX
0
REVIEW
5
PASS
3
INFO
1
Probed from Madrid, Spain
200 OK
Checks
9
3 PASS 5 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
URL Variants
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
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.uct.ac.za/
200https://uct.ac.za/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://uct.ac.za/ → https://uct.ac.za/

Consistent

B
HTTP Probe Timing
Total 958 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
215 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
180 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
183 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
778 ms
Total Time Total request time from DNS lookup through full response.
958 ms

Connection waterfall

DNS Lookup 215 ms TCP Connect 180 ms TLS Handshake 183 ms Server Processing 200 ms Content Transfer 180 ms
B
TLS Certificate Expiry & Recommendations
139 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

139
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
B
CDN & Delivery
Varnish
REVIEW
Varnish
Info::
Site is served via Varnish CDN
Got: via: 1.1 varnish (Varnish/6.2)
CDN Detected: Varnish
Provider Varnish Evidence via: 1.1 varnish (Varnish/6.2)
A
DNS Records
1 A records, 1093 ms lookup
PASS
1 A records, 1093 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 137.158.159.192
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: ucthpx.uct.ac.za, rain.psg.com, netman.uct.ac.za, dns3.uct.net.za
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 (1093 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 1093 ms
A137.158.159.192
AAAA—
CNAME—
NSucthpx.uct.ac.za, rain.psg.com, netman.uct.ac.za, dns3.uct.net.za
MX
10 za-smtp-inbound-1.mimecast.co.za
10 za-smtp-inbound-2.mimecast.co.za
TXT
everlytic-site-verification=044466d2974c268b38564aa5ca379c93b2c4936aa27c20eafa28...
everlytic-site-verification=adcceff25c2e31a888d0b8bead32b67de8e54c14a6a7cdf852e7...
successfactors-site-verification=NTU5ZTdkNWNmMTRjOWJiMzk0ZTQ5Nzg0Y2I5YzYyZWU2OWJ...
everlytic-site-verification=e27a945b1e444eb531bdff57fe66beb9fe80afda0e7e5bf02b70...
everlytic-site-verification=1a027b76068bc05e43e08c2b49bb02e1d6ec7b0a94c1ef932bbc...
everlytic-site-verification=68752f871e2ee328b1aeed1124d37c8dff832ce70744717918d6...
d365mktkey=5hinzr46mhjkiz5gnkuvwcrjy
google-site-verification=k5zhZ6iWnO9LefvCnh4aWoiegkWy8d1ltUUKlR3RY50
everlytic-site-verification=ecae1838a54497976a37ef49d8deabb6446a27506312b2396c70...
everlytic-site-verification=e85c7df45408ba931161cd718d0a86d1837af8dffa301697ecbc...
everlytic-site-verification=9082327157195c9e421cab231648989bc08aa2a478a9b707a362...
everlytic-site-verification=5c1dec5e35a750ab6382d7c083acf0b5b4869901f176b3dee92a...
everlytic-site-verification=82bfcc88e80a4df0c2be79e8be2028f91b98bbbf4c047b831610...
everlytic-site-verification=a086f9f07b3c1a23d9f1de2d05cc31225c360a5d9d59e43790e4...
SPF v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
everlytic-site-verification=c314887570cc1550fcedd42f2b4e200f6e4d1b6719e583c936b8...
everlytic-site-verification=37f51cb55556dc206d0908ee2f0874e69e8f595b31994537ec07...
everlytic-site-verification=fbeec3be2a09a105075c7520d74213d5effc16d8e13ca06cc472...
everlytic-site-verification=d865a1213843f8432cdc6f4f1d5f85ce2bb75443dc7a491b95ee...
everlytic-site-verification=9455b423bcc063f2e4c8f4a4c9eacb4dfe93604d5a7b87c510fc...
CAALookup not available with standard resolver
Resolved in 1093 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://uct.ac.za

https://uct.ac.za

553 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://uct.ac.za200553 msHTTP/1.1nginx/1.18.0 (Ubuntu)
A+
Crawlability
robots.txt present, sitemap with 35 URLs
PASS
robots.txt present, sitemap with 35 URLs
Info::
robots.txt is present
Got: 3989 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 35 entries
Info::
Sitemap index with 35 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 3989 B Sitemaps referenced 1 User-agents Sogou Spider, AhrefsBot, FriendlyCrawler, YandexBot, Bytespider, OAI-SearchBot, Slurp, DuckDuckBot, Baiduspider, SemrushBot, Googlebot, MJ12bot, GPTBot, ByteDanceSpider, ByteDance, *, Bingbot, Yandex Blocking No — crawling allowed
# robots.txt


User-agent: *

# CSS, JS, Images

Allow: /core/*.css$

Allow: /core/*.css?

Allow: /core/*.js$

Allow: /core/*.js?

Allow: /core/*.gif

Allow: /core/*.jpg

Allow: /core/*.jpeg

Allow: /core/*.png

Allow: /core/*.svg

Allow: /profiles/*.css$

Allow: /profiles/*.css?

Allow: /profiles/*.js$

Allow: /profiles/*.js?

Allow: /profiles/*.gif

Allow: /profiles/*.jpg

Allow: /profiles/*.jpeg

Allow: /profiles/*.png

Allow: /profiles/*.svg

# Directories

Disallow: /core/

Disallow: /profiles/

# Files

Disallow: /README.txt

Disallow: /web.config

# Paths (clean URLs)

Disallow: /admin/

Disallow: /comment/reply/

Disallow: /filter/tips

Disallow: /node/add/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=

Disallow: /user/register

Disallow: /user/password

Disallow: /user/login

Disallow: /user/logout

Disallow: /media/oembed

Disallow: /*/media/oembed

# Paths (no clean URLs)

Disallow: /index.php/admin/

Disallow: /index.php/comment/reply/

Disallow: /index.php/filter/tips

Disallow: /index.php/node/add/

Disallow: /index.php/search/

Disallow: /index.php/user/password

Disallow: /index.php/user/register

Disallow: /index.php/user/login

Disallow: /index.php/user/logout

Disallow: /index.php/media/oembed

Disallow: /index.php/*/media/oembed


User-agent: Googlebot

Disallow: /private/

Disallow: /secret.html

Disallow: /tmp/

Disallow: /cgi-bin/

Disallow: /admin/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=


User-agent: Bingbot

Disallow: /


User-agent: Slurp

Disallow: /private/

Disallow: /secret.html

Disallow: /tmp/

Disallow: /cgi-bin/

Disallow: /admin/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=


User-agent: DuckDuckBot

Disallow: /private/

Disallow: /secret.html

Disallow: /tmp/

Disallow: /cgi-bin/

Disallow: /admin/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=


User-agent: Baiduspider

Disallow: /private/

Disallow: /secret.html

Disallow: /tmp/

Disallow: /cgi-bin/

Disallow: /admin/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=


User-agent: Yandex

Disallow: /


User-agent: Sogou Spider

Disallow: /private/

Disallow: /secret.html

Disallow: /tmp/

Disallow: /cgi-bin/

Disallow: /admin/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=


User-agent: MJ12bot

Disallow: /private/

Disallow: /secret.html

Disallow: /tmp/

Disallow: /cgi-bin/

Disallow: /admin/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=


User-agent: AhrefsBot

Disallow: /private/

Disallow: /secret.html

Disallow: /tmp/

Disallow: /cgi-bin/

Disallow: /admin/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=


User-agent: SemrushBot

Disallow: /private/

Disallow: /secret.html

Disallow: /tmp/

Disallow: /cgi-bin/

Disallow: /admin/

Disallow: /search

Disallow: /search/

Disallow: /*/search

Disallow: /*/search/

Disallow: /*/search$

Disallow: /*/search?

Disallow: /*?*search=


User-agent: GPTBot

Disallow: /


User-agent: FriendlyCrawler

Disallow: /


User-agent: YandexBot

Disallow: /


User-agent: ByteDanceSpider

Disallow: /


User-agent: ByteDance

Disallow: /


User-agent: Bytespider

Disallow: /


User-agent: OAI-SearchBot

Disallow: /


# sitemap.xml
Sitemap: https://uct.ac.za/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 35 entries Valid XML Yes
Child Sitemaps:
Domain Intelligence
Domain intelligence data not available
INFO
Domain intelligence data not available

RDAP and WHOIS lookup both failed

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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