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.
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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)
BCrawlabilityno robots.txt, no sitemapREVIEW
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
No robots.txt — crawlers fetch /robots.txt and get 404; not breaking but means default crawl behavior with no directives or sitemap reference.
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A minimal robots.txt with `User-agent: * / Allow: / / Sitemap: https://example.com/sitemap.xml` covers the basics. Without it, crawlers behave fine but lose the sitemap signal and can't be selectively blocked from crawl-traps.
Source: robotstxt.org
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.
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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
No robots.txt found
This is fine for most sites — a missing robots.txt allows all crawling by default.
No sitemap found
Adding a sitemap helps search engines discover your pages.
BTLS Certificate Expiry & Recommendations42 days until leaf cert expires — 5 issues to addressREVIEW
Certificate validity
Recommended actions
- Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
- 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
BCDN & DeliveryAkamaiREVIEW
A+DNS Records2 A records, 21 ms lookupPASS
| A | 69.192.139.108, 69.192.139.83 |
| AAAA | 2600:1406:2e00:49::172e:d8cc, 2600:1406:2e00:49::172e:d8ce |
| CNAME | — |
| NS | dns1.p09.nsone.net, dns2.p09.nsone.net, dns3.p09.nsone.net, dns4.p09.nsone.net, a1-17.akam.net, a11-66.akam.net, a16-67.akam.net, a2-64.akam.net |
| MX | 0 asos-com.mail.protection.outlook.com |
| TXT | amazonses:juXOybZL6kWyoPBa60fIXsxr/LyfhgwJU/7noQSnOgE= adobe-idp-site-verification=51273a5e4f6a0a6b3c6dcde57b8cc217efb00787eae095c97c4c... miro-verification=16f939783197532306b283e5a49867536c662d79 d7a5c58e-8947-4063-addb-ed08dd68f5ff stripe-verification=b1e83e786a89374368457301ccf0811c5be10ae9c5d0b9b3590f36ec4ba0... stripe-verification=48e29927e27375f78230fb7fd869944d24309dd5b5f132e2165c468e3769... google-site-verification=goRehGj_G_9Hga0MyCpxczVQintWvlXEUKGloThbLfE openai-domain-verification=dv-GLCLOPFYKW5QycYxG2I79rLb bw=Z5xuuX+6owZJQfjh3jDpzAJEHksvAHW7yksLMX/IUoVp apple-domain-verification=smj2W2mEmn5jyHNN shopify-verification-code=hDuSllcHJr2LpBmFOoQVKUAkpAACee google-site-verification=ee9drX1inHSeLwnYcnq6vC-NgpiquAXA2jc9Cs3iHpM canva-site-verification=AtqU68vHKChemHAufzvnjQ adobe-sign-verification=50c15077b4fe3b0e7495a2c3c6e9a5bf f5910adae04b4bb2b834fdd24ab7fbce _vqw10ajfsd2fjjaz75lju5x84lj88zr atlassian-domain-verification=gfblClVv/paBkX07q028aaoTPnJXxzOqr0J5NesuL09KvukP/L... fgFnAm4dYU+jIDQeb9p1KakzKP7+Ma+b0oyNPnQz5cMPTFd5E/vVTzyz3xfuoLSINR1t2Bpp8211BDwi... google-site-verification=zAI5u-uXSk1SKzKanB5W9Usar-4387dXMN3PZ35-UJU SPF v=spf1 include:spfip.asos.com include:spf.protection.outlook.com include:asos.gn... facebook-domain-verification=mpvqshh1zfyunih7g3kbz4emngygtb _b62de8qda474hq8x6dl5l0xaciecf7y atlassian-domain-verification=39F8CAD7IC+z3STDdDbgH1fWTXX0t+eLQ66rznPoYQBy/6lsBt... docusign=8389f6cb-8d68-4642-85a3-d4303d99475c mixpanel-domain-verify=7d5f6264-117f-4f10-a9e2-3f59cb0ba7d7 CKO=cli_kapkhojij3ie5ht3hsycexijha _3u7cg7lnpxy63gupcyth21cbdus1pxa |
| 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 Chain0 redirect(s), 15 ms totalPASS
https://asos.com
15 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://asos.com | 301 | 15 ms | HTTP/1.1 | AkamaiGHost |
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
HTTP → HTTPS
Consistent
A+Domain Intelligenceasos.com — via CSC Corporate Domains, Inc., 26 years, 6 months old, hosted on AkamaiPASS
2055 days
February 27, 2032
42 days
Issued by DigiCert Inc
26 years, 6 months
Registered February 27, 2000
Not enabled
Protects against DNS spoofing
Akamai
ASN AS20940
69.192.139.108
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.
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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.
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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