Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DRedirect ChainAction2 redirect(s), 1012 ms totalFIX
https://nginx.com
108 ms · HTTP/1.1
https://www.nginx.com/
124 ms · HTTP/1.1
https://www.f5.com/products/nginx
780 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://nginx.com | 301 | 108 ms | HTTP/1.1 | volt-adc |
| 2 | https://www.nginx.com/ | 301 | 124 ms | HTTP/1.1 | volt-adc |
| 3 | https://www.f5.com/products/nginx | 200 | 780 ms | HTTP/1.1 | volt-adc |
See the visual redirect chain in the HTTP Probe tab →
Each redirect adds latency. Try to minimize the chain to 1 hop.
Redirect chain — each hop adds latency; combine into one redirect where possible.
Source: Google Search Central / web.dev
DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
CCrawlabilityActionrobots.txt present, sitemap with 0 URLsREVIEW
Search engines may not be able to parse the sitemap. Fix XML validation errors.
An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.
Learn more ▾ ▴
Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.
Source: sitemaps.org / Google Search Central
An empty sitemap provides no value. Add <url> entries for your pages.
An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.
Learn more ▾ ▴
Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.
Source: Google Search Central / sitemaps.org
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
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BTLS Certificate Expiry & Recommendations44 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 Records1 A records, 58 ms lookupPASS
| A | 159.60.134.0 |
| AAAA | — |
| CNAME | — |
| NS | ns2.f5clouddns.com, ns1.f5clouddns.com |
| MX | 10 mx1.hc5801-97.iphmx.com 10 mx2.hc5801-97.iphmx.com |
| TXT | google-site-verification=uUuJd81gBFhTSzGpOtmzRFJndx0uHcICLcicMmjP_eQ MS=ms49391549 libera-verification=libera-RDmNyEJHyhbWgEZwNf3L9fUN dropbox-domain-verification=gl56nwvh4szl citrix-verification-code=7e4cb6c1-154c-48ed-bdfa-65d310d86ec1 docusign=ec7fb56d-ee75-4979-b3e5-10bfbff0ab9e SPF v=spf1 ip4:206.251.255.60/30 ip4:94.130.165.194/32 ip4:206.251.255.64/31 ip4:10... google-site-verification=JrwNJWq0sLGx6H5Voxu-bQyH6-Fj6ifMzyNzIppraFc atlassian-domain-verification=Iv/Cm1UielF25k9FOYOH+QWS9iqMJUFKzUNVB9RqH3uwzIEPzi... google-site-verification=Q2uo9nRIztLd374gimJdAb-Bfkw-MdywUFjH59AAkeE google-site-verification=m76lJj_wpFCOdcQ91QngVK7pk83_xTMtIp9m0Vi8qjQ |
| 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.
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligencenginx.com — via CSC Corporate Domains, Inc., 21 years, 7 months old, hosted on F5, FRPASS
190 days
December 23, 2026
44 days
Issued by Let's Encrypt
21 years, 7 months
Registered December 23, 2004
Not enabled
Protects against DNS spoofing
F5, FR
ASN AS35280
159.60.134.0
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