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https://cureus.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
94
GRADE
A
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
6 PASS 3 REVIEW
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.cureus.com/
200https://cureus.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://cureus.com/ → https://www.cureus.com/

Consistent

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

Certificate validity

58
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
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: 9f0836a2be55c2cf-CDG
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9f0836a2be55c2cf-CDG
A+
DNS Records
2 A records, 48 ms lookup
PASS
2 A records, 48 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 104.20.46.252, 172.66.147.193
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:10::ac42:93c1, 2606:4700:10::6814:2efc
Info::
2 nameserver(s) configured
Got: frank.ns.cloudflare.com, alina.ns.cloudflare.com
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
Info::
DNS resolution time: 48 ms
Got: 48 ms
A104.20.46.252, 172.66.147.193
AAAA2606:4700:10::ac42:93c1, 2606:4700:10::6814:2efc
CNAME—
NSfrank.ns.cloudflare.com, alina.ns.cloudflare.com
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
TXT
google-site-verification=Sxv0iAQOc2kHgA7t6Qn1VlCvLIlY1s54TNDIDasM08g
SPF v=spf1 include:_spf.google.com include:sendgrid.net include:46589883.spf06.hubsp...
google-site-verification=xi9bWdfRD0L_eZyHAC0OrSVrhjQBPNMLavr2352RvcU
facebook-domain-verification=qvab42q5jj5ywfvtnor4aads32e66s
google-site-verification=RqOBw4n92ihjrSzVJ11MM4GnyjJWgFIY1sDR9_BT4rI
klaviyo-site-verification=SXG3qN
google-site-verification=j5weGvQ_nHN9ofFA76ptqncdDRWLYmNlWoB8gouascc
CAALookup not available with standard resolver
Resolved in 48 ms

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), 856 ms total
PASS
1 redirect(s), 856 ms total
Info::
Single redirect
Got: https://cureus.com → https://www.cureus.com/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 856 ms total
Got: 856 ms

https://cureus.com

64 ms · HTTP/1.1

301

https://www.cureus.com/

793 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://cureus.com30164 msHTTP/1.1cloudflare
2https://www.cureus.com/200793 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2606:4700:10::ac42:93c1, 2606:4700:10::6814:2efc
Got: 17 ms connect
IPv6 Ready
AAAA Records 2606:4700:10::ac42:93c1, 2606:4700:10::6814:2efc Connection Reachable (17 ms)
A+
Crawlability
robots.txt present, sitemap with 69 URLs
PASS
robots.txt present, sitemap with 69 URLs
Info::
robots.txt is present
Got: 1086 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 69 entries
Info::
Sitemap index with 69 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1086 B Sitemaps referenced 1 User-agents ExaBot, GPTBot, *, AhrefsBot, YouBot, SemrushBot, AndiBot, CCBot, Google-Extended, dotbot, OAI-SearchBot, PerplexityBot, FirecrawlAgent, PhindBot, ChatGPT-User Blocking No — crawling allowed
# See http://www.robotstxt.org/wc/norobots.html for documentation on how to use the robots.txt file
#
# To ban all spiders from the entire site uncomment the next two lines:
User-agent: *
Disallow: /search
Disallow: /users/*/similar_profiles
Disallow: /invite_colleague
Disallow: /people
Disallow: /cureus_career_center
Disallow: /users/*/coauthors
Disallow: /users/*/activities
Disallow: /articles/*/score/fetch_props
Disallow: /articles/*/suggested_articles
Disallow: /articles/*/fetch_likes_and_comments
Disallow: /articles/*/most_popular_by_category
Sitemap: https://www.cureus.com/sitemaps/sitemap.xml

User-agent: AhrefsBot
Crawl-Delay: 8

User-agent: SemrushBot
Crawl-Delay: 8

User-agent: dotbot
Crawl-delay: 8

# Allow AI search and agent use
User-agent: OAI-SearchBot
User-agent: ChatGPT-User  
User-agent: PerplexityBot
User-agent: FirecrawlAgent
User-agent: AndiBot
User-agent: ExaBot
User-agent: PhindBot
User-agent: YouBot
Crawl-delay: 8 
Allow: /

# Disallow AI training data collection  
User-agent: GPTBot  
User-agent: CCBot  
User-agent: Google-Extended  
Disallow: /
sitemap.xml 200 OK
Type Sitemap Index URLs 69 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
cureus.com — via NameCheap, Inc., 22 years, 10 months old
PASS
cureus.com — via NameCheap, Inc., 22 years, 10 months old
Info::
Domain registered until Oct 16, 2027 (1 years, 6 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: NameCheap, Inc.
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Domain expiry

488 days

October 16, 2027

SSL certificate

58 days

Issued by Google Trust Services

Domain age

22 years, 10 months

Registered October 16, 2003

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700:10::ac42:93c1

Registrar

NameCheap, Inc.

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar NameCheap, Inc.
Created October 16, 2003 (22 years, 10 months ago)
Expires October 16, 2027 (1 years, 6 months)
Last Updated September 18, 2025
Name Servers alina.ns.cloudflare.com, frank.ns.cloudflare.com
DNSSEC Not enabled
Hosting
IP Address 2606:4700:10::ac42:93c1
Data source: rdap (0.1s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 107 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
47 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
17 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
22 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
107 ms
Total Time Total request time from DNS lookup through full response.
107 ms

Connection waterfall

DNS Lookup 47 ms TCP Connect 17 ms TLS Handshake 22 ms Server Processing 22 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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