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.
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
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.
Learn more ▾ ▴
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.
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
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 & Recommendations160 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
Recommended actions
- Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
- 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
A+DNS Records1 A records, 70 ms lookupPASS
| A | 75.2.119.185 |
| AAAA | — |
| CNAME | — |
| NS | ns-978.awsdns-58.net, ns-1127.awsdns-12.org, ns-357.awsdns-44.com, ns-1909.awsdns-46.co.uk |
| MX | 0 oup-com.mail.protection.outlook.com |
| TXT | amazonses:shpeEfKmt15//FJPoqxXkjgPNoq/3kl6X4285ag5jlY= extensis-domain-verification=3aaa6ea8-db56-4a1f-9d25-22a5a6b498e5 2023092106224912p42xkqbpm3l81r2jsbacovg9s9q3la1tutu0q51rpl6xoimt QqmWM112i4oBxS0QPj9R9ZSFrp2LuCSzsC+xu/gABKYmFl7aEkP1Vi1UhSJjfrtpkPZ6G6FYHubgy5RV... google-site-verification=PYNeKecxmCj5LntGeFR9LctpvQ8kGLXfZhDmZpY1To0 202507280453414zv31glcr7a0exuwqqo9w78u3mwp2zrjuu28uw65t2pf1mhirw apple-domain-verification=xqY0Xve1iBeDU3oP 202408160631492zz4ld52hnj8b4cnajhnooiiewezswl6k41nks29uuekdkk0pu jamf-site-verification=SjCetASEV02cRq1mMKeVCA asv=821f1894b6c3ed4504677f37372b17a2 202210180513545cple2fkuhb68qhysfzwoz3whi0kivumr1spm9ve6k0s6zvyex amazonses:0ht/KqQQbxtWheU8qo94xWaKZISyawQbVhJ6VLxFXJ0= dxltnll3rl7dytlt67h0gy3gmx3w85gh successfactors-site-verification=NGY5MmVlZTljZTAxMjRjYzI4NzgyZGViNTM5NDExM2U0NTU... atlassian-domain-verification=mzlAcvMuIYkLiHA2LSyM2oyN0cQkR6SaXbbzVa6WP9KY0ELK7u... SPF v=spf1 include:spf.oup.com ~all amazonses:AvW9Jt81IgzXdhkjydgCuQDAtVz2bVpv0ab0Iaib7BM= 202310050501365uo6tiyd4bzz3ztjpd9hb0nhumfdjqnd58cu5hb12lcbidk6gl N4Dp4KDSv6Df3SnmjUg+2o9/g+DNdtMSqvC+WJtHgpaLJJE97IzkaDQy/zNEBWLRd+GDPkJJOu4+DswY... amazonses:MC0r2MspGED2oLeKbyx2dE4K73YLVDupR/nrtuhI5Ys= nhmv6bqhjs1n5f7xlg7x3rfhhpz19k79 202602021438410drtce4on242m03n8iur18692j2ozursqdvcrcefdowk651lse amazonses:DbkZC1OstLB5ogUYHveWGxFXxYRHZRXrSne49LVcHqs= 202209010614490xwzgvrtdhy8h73ud30uostgg438wcapgb5dk6z5xolf8eeda4 google-site-verification=vM2dmi3OLOW49Hl3d4ZPjpqhorDRBEe-2TPP9Qa1m90 _globalsign-domain-verification=3WCRbOQ53L2WYUNy9jaVbOwgxOEZJIcxuLBRBGG4ep 050bl8t8s688tg4j0qt8kxvxxtd2nl7y miro-verification=c0c42f94a78fb863daf3f4d5f8e6cd116238bcd9 adobe-idp-site-verification=28ab8542-7026-4f19-9abb-dbd13c95f35f 202501210656100isgbhlfr8n3zej0k2jszn3loy26ebqw3a71bbyxmf4zc6anqt 9v68s7hc6166vyt8wltgrgnxqqsz7csz facebook-domain-verification=uxkztb5qloh5h1jcrdzxfduo0iggbd |
| 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.
ARedirect Chain1 redirect(s), 271 ms totalPASS
https://oup.com
135 ms · HTTP/1.1
https://corp.oup.com
136 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://oup.com | 301 | 135 ms | HTTP/1.1 | Apache/2.4.66 () |
| 2 | https://corp.oup.com | 200 | 136 ms | HTTP/1.1 | cloudflare |
See the visual redirect chain in the HTTP Probe tab →
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligenceoup.com — via CSC Corporate Domains, Inc., 28 years, 6 months old, hosted on AWSPASS
223 days
February 22, 2027
160 days
Issued by Amazon
28 years, 6 months
Registered February 23, 1998
Not enabled
Protects against DNS spoofing
AWS
ASN AS16509
75.2.119.185
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