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https://medrxiv.org

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
90
GRADE
A
FIX
0
REVIEW
2
PASS
6
INFO
1
Probed from Madrid, Spain
302 Found
Checks
9
6 PASS 2 REVIEW
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.medrxiv.org/
200https://medrxiv.org/

Inconsistent — duplicate content risk

HTTP → HTTPS

302http://medrxiv.org/ → https://www.medrxiv.org/

Use 301 (permanent) instead of 302 (temporary)

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

Certificate validity

48
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
2 A records, 48 ms lookup
PASS
2 A records, 48 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 104.21.11.180, 172.67.166.236
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:3031::ac43:a6ec, 2606:4700:3033::6815:bb4
Info::
2 nameserver(s) configured
Got: jen.ns.cloudflare.com, vin.ns.cloudflare.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: 48 ms
Got: 48 ms
A104.21.11.180, 172.67.166.236
AAAA2606:4700:3031::ac43:a6ec, 2606:4700:3033::6815:bb4
CNAME—
NSjen.ns.cloudflare.com, vin.ns.cloudflare.com
MX
1 usb-smtp-inbound-1.mimecast.com
1 usb-smtp-inbound-2.mimecast.com
TXT
SPF v=spf1 include:usb._netblocks.mimecast.com include:helpscoutemail.com a:it-ppmgw...
MS=ms86782598
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), 645 ms total
PASS
1 redirect(s), 645 ms total
Info::
Single redirect
Got: https://medrxiv.org → https://www.medrxiv.org/ (302)
Info::
WWW normalization redirect
Info::
Uses 302 (temporary) redirect
If permanent, use 301 instead.
Got: https://medrxiv.org
Info::
Redirect overhead: 645 ms total
Got: 645 ms

https://medrxiv.org

229 ms · HTTP/1.1

302

https://www.medrxiv.org/

416 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://medrxiv.org302229 msHTTP/1.1cloudflare
2https://www.medrxiv.org/200416 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

If permanent, use 301 instead.

Why this matters

302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.

Learn more ▾

Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).

Source: Google Search Central

A+
IPv6 Readiness
IPv6 reachable (16 ms)
PASS
IPv6 reachable (16 ms)
Info::
IPv6 is configured and reachable at 2606:4700:3031::ac43:a6ec, 2606:4700:3033::6815:bb4
Got: 16 ms connect
IPv6 Ready
AAAA Records 2606:4700:3031::ac43:a6ec, 2606:4700:3033::6815:bb4 Connection Reachable (16 ms)
A+
Crawlability
robots.txt present, sitemap with 2 URLs
PASS
robots.txt present, sitemap with 2 URLs
Info::
robots.txt is present
Got: 2188 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 2 entries
Info::
Sitemap index with 2 child sitemaps
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

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 2188 B Sitemaps referenced 0 User-agents * Blocking No — crawling allowed
#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
Crawl-delay: 7
# CSS, JS, Images
Allow: /misc/*.css$
Allow: /misc/*.css?
Allow: /misc/*.js$
Allow: /misc/*.js?
Allow: /misc/*.gif
Allow: /misc/*.jpg
Allow: /misc/*.jpeg
Allow: /misc/*.png
Allow: /modules/*.css$
Allow: /modules/*.css?
Allow: /modules/*.js$
Allow: /modules/*.js?
Allow: /modules/*.gif
Allow: /modules/*.jpg
Allow: /modules/*.jpeg
Allow: /modules/*.png
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: /themes/*.css$
Allow: /themes/*.css?
Allow: /themes/*.js$
Allow: /themes/*.js?
Allow: /themes/*.gif
Allow: /themes/*.jpg
Allow: /themes/*.jpeg
Allow: /themes/*.png
# Directories
Disallow: /includes/
Disallow: /misc/
Disallow: /modules/
Disallow: /profiles/
Disallow: /scripts/
Disallow: /themes/
# Files
Disallow: /CHANGELOG.txt
Disallow: /cron.php
Disallow: /INSTALL.mysql.txt
Disallow: /INSTALL.pgsql.txt
Disallow: /INSTALL.sqlite.txt
Disallow: /install.php
Disallow: /INSTALL.txt
Disallow: /LICENSE.txt
Disallow: /MAINTAINERS.txt
Disallow: /update.php
Disallow: /UPGRADE.txt
Disallow: /xmlrpc.php
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips/
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register/
Disallow: /user/password/
Disallow: /user/login/
Disallow: /user/logout/
# Paths (no clean URLs)
Disallow: /?q=admin/
Disallow: /?q=comment/reply/
Disallow: /?q=filter/tips/
Disallow: /?q=node/add/
Disallow: /?q=search/
Disallow: /?q=user/password/
Disallow: /?q=user/register/
Disallow: /?q=user/login/
Disallow: /?q=user/logout/
sitemap.xml 200 OK
Type Sitemap Index URLs 2 entries Valid XML Yes
Child Sitemaps:
A+
HTTP Probe Timing
Total 273 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
44 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.
24 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
274 ms
Total Time Total request time from DNS lookup through full response.
274 ms

Connection waterfall

DNS Lookup 44 ms TCP Connect 17 ms TLS Handshake 24 ms Server Processing 189 ms Content Transfer 0 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: 9eff59ef6c726f5e-CDG
Info::
CDN cache status: DYNAMIC
CDN Detected: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: 9eff59ef6c726f5e-CDG
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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