Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations61 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
ADNS Records1 A records, 23 ms lookupPASS
| A | 216.239.32.27 |
| AAAA | 2001:4860:4802:32::1b |
| CNAME | — |
| NS | ns-cloud-c3.googledomains.com, ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c4.googledomains.com |
| MX | 1 aspmx.l.google.com 5 alt1.aspmx.l.google.com 5 alt2.aspmx.l.google.com 10 alt4.aspmx.l.google.com 10 alt3.aspmx.l.google.com |
| TXT | google-site-verification=FO-asi2Djdtu7CEiXqj2n80rSNcub6WhE1r9L9z6oy8 google-site-verification=ZUIlu5kbb0_nreS5Lt6lvD_1SRhbVsGq6TL21s9Gaas google-site-verification=Vkyt5mqyb-P34Ml0V8lKVja03ei0oPLCZ3ZCOBduc3Y google-site-verification=_8hwbyJ2D3u3458Fk9vBuhCCqRwPq15MdsnMqk--yqw google-site-verification=FAtbPSvbHZAsXSctJdRh6NqtZ9hiqh_kpHCjCZGbtK8 google-site-verification=8BeJx_QNi-UYmUtA-s_LwjRTHYaD3dUuScW6yWJ1ll0 google-site-verification=XFmqvz7DWBJ7KR-e6wgiIYl8e7o8rSUqP5j1QIM1k7o google-site-verification=QNIZ02ik6DHanav0Ubf2AEE0Cwj3QosClem0_euvXkw google-site-verification=X8e_3ME8hmVBfXrryoejTpijLplKKSbDDBqKUFxJULA |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.
Learn more ▾ ▴
Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.
Source: SRE practice / DNS architecture
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.
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.
Learn more ▾ ▴
SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.
Source: RFC 7208 (SPF)
ARedirect Chain1 redirect(s), 599 ms totalPASS
https://tensorflow.org
60 ms · HTTP/1.1
https://www.tensorflow.org/
539 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://tensorflow.org | 301 | 60 ms | HTTP/1.1 | sffe |
| 2 | https://www.tensorflow.org/ | 200 | 539 ms | HTTP/1.1 | Google Frontend |
See the visual redirect chain in the HTTP Probe tab →
A+IPv6 ReadinessIPv6 reachable (16 ms)PASS
A+Crawlabilityrobots.txt present, sitemap with 1 URLsPASS
User-agent: *
Sitemap: https://www.tensorflow.org/sitemap.xml
A+Domain Intelligencetensorflow.org — via MarkMonitor Inc., 10 years, 9 months oldPASS
71 days
August 25, 2026
61 days
Issued by Google Trust Services
10 years, 9 months
Registered August 25, 2015
Not enabled
Protects against DNS spoofing
Unknown
2001:4860:4802:32::1b
MarkMonitor Inc.
Expiry timeline
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry
- 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