Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.FIPv6 ReadinessActionIPv6 records exist but unreachableFIX
Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.
Advertising IPv6 (AAAA records) without a reachable server means IPv6-preferring clients silently fail every connection.
Learn more ▾ ▴
Modern browsers prefer IPv6 if AAAA exists (Happy Eyeballs algorithm). If the IPv6 server isn't reachable, browsers fall back to IPv4 — but with seconds of added latency per request. Either fix IPv6 reachability or remove the AAAA records.
Source: RFC 8305 (Happy Eyeballs)
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
# Dark Visitors robots.txt from https://darkvisitors.com/robots-txt-builder
# AI Data Scraper
# https://darkvisitors.com/agents/ai2bot
User-agent: AI2Bot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/applebot-extended
User-agent: Applebot-Extended
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/bytespider
User-agent: Bytespider
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/ccbot
User-agent: CCBot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/claudebot
User-agent: ClaudeBot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/diffbot
User-agent: Diffbot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/cohere-training-data-crawler
User-agent: cohere-training-data-crawler
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/cotoyogi
User-agent: Cotoyogi
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/datenbank-crawler
User-agent: Datenbank Crawler
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/facebookbot
User-agent: FacebookBot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/factset-spyderbot
User-agent: Factset_spyderbot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/google-extended
User-agent: Google-Extended
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/gptbot
User-agent: GPTBot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/icc-crawler
User-agent: ICC-Crawler
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/kangaroo-bot
User-agent: Kangaroo Bot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/meta-externalagent
User-agent: Meta-ExternalAgent
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/netestate-imprint-crawler
User-agent: netEstate Imprint Crawler
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/omgili
User-agent: omgili
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/pangubot
User-agent: PanguBot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/petalbot
User-agent: PetalBot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/semrushbot-ocob
User-agent: SemrushBot-OCOB
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/timpibot
User-agent: Timpibot
Disallow: /
# AI Data Scraper
# https://darkvisitors.com/agents/webzio-extended
User-agent: Webzio-Extended
Disallow: /
# Indexes content for Algolia search engine - which
# https://radar.cloudflare.com/bots/directory/algolia
User-Agent: Algolia Crawler
Disallow: /
# All other crawlers
User-agent: *
Disallow: /*/by/* # sorting options
Disallow: /*/popular/this/* # popularity sorting options
Disallow: /*/on/* # availability options
Disallow: /*/tag/* # Members? tag lists
Disallow: /*/genre/* # Films by genre
Disallow: /*/country/* # Films by country
Disallow: /*/language/* # Films by language
Disallow: /*/decade/* # Films by decade
Disallow: /films/year/* # Films by year
Disallow: /films/*/year/* # Films by year
Disallow: /films/*/size/large/* # Films with large posters (and therefore stats)
Disallow: /*/friends/* # stuff grouped for users' friends
No sitemap found
Adding a sitemap helps search engines discover your pages.
BTLS Certificate Expiry & Recommendations59 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
Recommended actions
- Add includeSubDomains to the HSTS directive
- Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
- 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, 9 ms lookupPASS
| A | 172.66.168.234, 104.20.22.249 |
| AAAA | 2606:4700:10::6814:16f9, 2606:4700:10::ac42:a8ea |
| CNAME | — |
| NS | isla.ns.cloudflare.com, major.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 | apple-domain-verification=qVnI-JrN4zuhuHbKgoLdZfL2LNwzEkW0KmU0nYXQ1Pg facebook-domain-verification=rlqrz8ctxk6c5gwg7ofzinsurscjqs google-site-verification=2wdFpOSsCNleUqOWpW8bx0gx1_tlr9vxpuARUguKw9s google-site-verification=Y-zkjggIRxeVV3sXhXaN7qrdh1PxJkPoJdTuF9MMhrs google-site-verification=vr_zjYN3BM6NQE1--g4om5pWdhk8ituDccKJWS274mE twilio-domain-verification=e1786b2574779e0531aba8d7470ad271 SPF v=spf1 include:_spf.google.com ip4:107.182.233.166 ip4:107.182.233.169 ip4:206.2... yahoo-verification-key=nnwi73eFY9zUGW5MOFMyFuvhxFmPnySFLZyJf4QmNx4= |
| 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.
A+Redirect ChainNo redirects — direct accessPASS
https://letterboxd.com
48 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://letterboxd.com | 200 | 48 ms | HTTP/1.1 | cloudflare |
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligenceletterboxd.com — via NameCheap, Inc., 17 years, 6 months old, hosted on CloudflarePASS
568 days
January 4, 2028
59 days
Issued by Google Trust Services
17 years, 6 months
Registered January 4, 2009
Not enabled
Protects against DNS spoofing
Cloudflare
ASN AS13335
172.66.168.234
NameCheap, 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