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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
83
GRADE
B
FIX
1
REVIEW
4
PASS
4
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
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
no robots.txt, no sitemap
REVIEW
no robots.txt, no sitemap
Info::
No robots.txt found
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
Info::
No sitemap.xml found
A sitemap helps search engines discover and index your pages more efficiently.

robots.txt is optional but recommended. It tells search engine crawlers which pages to index.

Why this matters

No robots.txt — crawlers fetch /robots.txt and get 404; not breaking but means default crawl behavior with no directives or sitemap reference.

Learn more ▾

A minimal robots.txt with `User-agent: * / Allow: / / Sitemap: https://example.com/sitemap.xml` covers the basics. Without it, crawlers behave fine but lose the sitemap signal and can't be selectively blocked from crawl-traps.

Source: robotstxt.org

A sitemap helps search engines discover and index your pages more efficiently.

Why this matters

No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.

Learn more ▾

A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.

Source: sitemaps.org / Google Search Central

robots.txt No robots.txt found

No robots.txt found

This is fine for most sites — a missing robots.txt allows all crawling by default.

sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

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.shinyapps.io/
200https://shinyapps.io/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://shinyapps.io/ → https://shinyapps.io:443/

Consistent

B
TLS Certificate Expiry & Recommendations
105 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

105
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • 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
6 A records, 37 ms lookup
PASS
6 A records, 37 ms lookup
Info::
Resolves to 6 IPv4 address(es)
Got: 34.232.236.218, 52.72.201.238, 34.205.188.38, 3.216.24.241, 3.226.163.91, 52.86.9.92
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1213.awsdns-23.org, ns-1828.awsdns-36.co.uk, ns-575.awsdns-07.net, ns-452.awsdns-56.com
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
Info::
DNS resolution time: 37 ms
Got: 37 ms
A34.232.236.218, 52.72.201.238, 34.205.188.38, 3.216.24.241, 3.226.163.91, 52.86.9.92
AAAA—
CNAME—
NSns-1213.awsdns-23.org, ns-1828.awsdns-36.co.uk, ns-575.awsdns-07.net, ns-452.awsdns-56.com
MX
10 mxa.mailgun.org
10 mxb.mailgun.org
TXT
SPF v=spf1 include:mailgun.org include:mail.zendesk.com ~all
google-site-verification=nHiu8E2-dflzFcWvVOZhEAs7JdW-Et4kZ231_8D18jE
CAALookup not available with standard resolver
Resolved in 37 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), 894 ms total
PASS
1 redirect(s), 894 ms total
Info::
Single redirect
Got: https://shinyapps.io → https://www.shinyapps.io:443/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 894 ms total
Got: 894 ms

https://shinyapps.io

386 ms · HTTP/1.1

301

https://www.shinyapps.io:443/

508 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://shinyapps.io301386 msHTTP/1.1awselb/2.0
2https://www.shinyapps.io:443/200508 msHTTP/1.1TornadoServer/6.5.5

See the visual redirect chain in the HTTP Probe tab →

A+
Domain Intelligence
shinyapps.io — via Gandi SAS, 12 years, 9 months old, hosted on AWS
PASS
shinyapps.io — via Gandi SAS, 12 years, 9 months old, hosted on AWS
Info::
Domain registered until Sep 7, 2026 (4 months remaining)
Info::
Registrar: Gandi SAS
Info::
Registrar lock is enabled
Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.
Info::
Hosting: AWS
Got: AS16509
Domain expiry

53 days

September 7, 2026

SSL certificate

105 days

Issued by Amazon

Domain age

12 years, 9 months

Registered September 7, 2013

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

52.72.201.238

Registrar

Gandi SAS

Locked 4 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 Gandi SAS
Created September 7, 2013 (12 years, 9 months ago)
Expires September 7, 2026 (4 months)
Last Updated August 8, 2025
Name Servers ns-1213.awsdns-23.org, ns-575.awsdns-07.net, ns-452.awsdns-56.com, ns-1828.awsdns-36.co.uk
Registrant RStudio
Hosting
IP Address 52.72.201.238
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: whois (1.2s)

Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.

Why this matters

Registrar lock (clientTransferProhibited et al.) prevents unauthorized domain transfers — strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A
HTTP Probe Timing
Total 428 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
38 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
97 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
195 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
429 ms
Total Time Total request time from DNS lookup through full response.
429 ms

Connection waterfall

DNS Lookup 38 ms TCP Connect 97 ms TLS Handshake 195 ms Server Processing 98 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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