Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.BCrawlabilityrobots.txt present, no sitemapREVIEW
A sitemap helps search engines discover and index your pages more efficiently.
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
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.
robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.
Source: sitemaps.org
#
# 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: BLEXBot
Disallow: /
User-agent: Bytespider
Disallow: /
User-agent: Exabot
Disallow: /
User-agent: Scanbot
Disallow: /
User-agent: Semrush
Disallow: /
User-agent: SemrushBot
Disallow: /
User-agent: YoudaoBot
Disallow: /
User-agent: Baiduspider
Disallow: /
User-agent: YandexBot
Disallow: /
User-agent: openai
Disallow: /
User-agent: Petalbot
Disallow: /
User-agent: Bolt
Disallow: /
User-agent: BunnySlippers
Disallow: /
User-agent: ChatGPT-User
Disallow: /
User-agent: GPTBot
Disallow: /
User-agent: Gigabot
Disallow: /
User-agent: HybridBot
Disallow: /
User-agent: JikeSpider
Disallow: /
User-agent: SMTBot
Disallow: /
User-agent: ScreenerBot
Disallow: /
User-agent: SiteLockSpider
Disallow: /
User-agent: SuperBot
Disallow: /
User-agent: SuperHTTP
Disallow: /
User-agent: Amazonbot
Disallow: /
User-agent: AhrefsBot
Disallow: /
User-agent: Applebot
Disallow: /
User-agent: SEMrush
Disallow: /
User-agent: DataForSeoBot
Disallow: /
User-agent: ClaudeBot
Disallow: /
User-agent: DotBot
Disallow: /
User-agent: phxbot
Disallow: /
User-agent: AwarioBot
Disallow: /
User-agent: SeekportBot
Disallow: /
User-agent: MJ12bot
Disallow: /
User-agent: Majestic12
Disallow: /
User-agent: facebookexternalhit/1.1
Disallow: /
User-agent: PerplexityBot
Disallow: /
User-agent: Qwantbot
Disallow: /
User-agent: CCBot
Disallow: /
User-agent: python-requests/2.32.3
Disallow: /
User-agent: wget
Disallow: /
User-agent: curl
Disallow: /
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/
Disallow: /user
No sitemap found
Adding a sitemap helps search engines discover your pages.
CURL VariantsActionwww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Use 301 (permanent) instead of 302 (temporary)
BTLS Certificate Expiry & Recommendations44 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
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 Records2 A records, 49 ms lookupPASS
| A | 104.21.50.144, 172.67.207.1 |
| AAAA | 2606:4700:3034::6815:3290, 2606:4700:3030::ac43:cf01 |
| CNAME | — |
| NS | vin.ns.cloudflare.com, jen.ns.cloudflare.com |
| MX | 10 usb-smtp-inbound-1.mimecast.com 10 usb-smtp-inbound-2.mimecast.com |
| TXT | SPF v=spf1 include:usb._netblocks.mimecast.com include:helpscoutemail.com a:it-ppmgw... MS=ms36527074 |
| CAA | Lookup not available with standard resolver |
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
ARedirect Chain1 redirect(s), 729 ms totalPASS
https://biorxiv.org
226 ms · HTTP/1.1
https://www.biorxiv.org/
502 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://biorxiv.org | 302 | 226 ms | HTTP/1.1 | cloudflare |
| 2 | https://www.biorxiv.org/ | 200 | 502 ms | HTTP/1.1 | cloudflare |
See the visual redirect chain in the HTTP Probe tab →
If permanent, use 301 instead.
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 ReadinessIPv6 reachable (17 ms)PASS
A+Domain Intelligencebiorxiv.org — via CSC Corporate Domains, Inc., 13 years, 2 months oldPASS
266 days
April 8, 2027
44 days
Issued by Google Trust Services
13 years, 2 months
Registered April 8, 2013
Not enabled
Protects against DNS spoofing
Unknown
2606:4700:3034::6815:3290
CSC Corporate Domains, Inc.
Expiry timeline
Recommended actions
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
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.
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