Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.BDomain Intelligencespeakerdeck.com — via 1API GmbH, 16 years, 2 months oldREVIEW
EXPIRED
May 12, 2026
43 days
Issued by Google Trust Services
16 years, 2 months
Registered May 12, 2010
Not enabled
Protects against DNS spoofing
Unknown
2606:4700:10::6814:1cb5
1API GmbH
Expiry timeline
Recommended actions
- Domain has EXPIRED — renew immediately to avoid total site outage
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
This domain expires on May 12, 2026. Domains that expire accidentally cause complete website downtime. Enable auto-renewal or renew manually now.
Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.
Source: ICANN renewal policy
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
BTLS Certificate Expiry & Recommendations43 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
- 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, 14 ms lookupPASS
| A | 172.66.158.156, 104.20.28.181 |
| AAAA | 2606:4700:10::ac42:9e9c, 2606:4700:10::6814:1cb5 |
| CNAME | — |
| NS | john.ns.cloudflare.com, nola.ns.cloudflare.com |
| MX | 1 aspmx.l.google.com 5 alt1.aspmx.l.google.com 5 alt2.aspmx.l.google.com 10 aspmx2.googlemail.com 10 aspmx3.googlemail.com |
| TXT | ALIAS for speakerdeck.com.herokudns.com facebook-domain-verification=5rzw9hjdxxzobpi4p6lk9tlvpldfej google-site-verification=3ggCXuHu3Wkywh0QJ4MVBy9jz0MMfAEVJGNVQP56eyY google-site-verification=U0zznvYUS5x_csx7-HqM5TJh-EGrTvjQOR7wCPGyv74 stripe-verification=51e5bf1257eaab3496a4c15cdce19f2c27d591dd7d87097e936b1fbc2e84... SPF v=spf1 include:mailgun.org ~all |
| 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://speakerdeck.com
447 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://speakerdeck.com | 200 | 447 ms | HTTP/1.1 | cloudflare |
A+IPv6 ReadinessIPv6 reachable (1 ms)PASS
A+Crawlabilityrobots.txt present, sitemap with 22 URLsPASS
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
User-agent: *
Disallow: /*signin?*
Disallow: /*kolkata*
Disallow: /*call-0821*
Disallow: /*return_to=*
Disallow: /*share.php?*
Disallow: /*.atom*
Allow: /p/all.atom?page=10
Allow: /p/all.atom?page=9
Allow: /p/all.atom?page=8
Allow: /p/all.atom?page=7
Allow: /p/all.atom?page=6
Allow: /p/all.atom?page=5
Allow: /p/all.atom?page=4
Allow: /p/all.atom?page=3
Allow: /p/all.atom?page=2
Allow: /p/all.atom?page=1
Allow: /p/all.atom
Allow: /c/how-to-diy.atom
Allow: /c/technology.atom
Allow: /c/science.atom
Allow: /c/research.atom
Allow: /c/programming.atom
Allow: /c/design.atom
Allow: /c/business.atom
Allow: /p/featured.atom
Allow: /c/education.atom
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent