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 & Recommendations77 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Submit your domain to hstspreload.org to be added to the Chrome preload list
- 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, 21 ms lookupPASS
| A | 45.60.86.93, 45.60.115.93 |
| AAAA | — |
| CNAME | — |
| NS | ns02.brandshelter.net, ns01.brandshelter.com |
| MX | 10 mxb-005f4802.gslb.pphosted.com 10 mxa-005f4802.gslb.pphosted.com |
| TXT | MS=ms81241719 _cftn9x585yz9b3cb3i1ari4j6bh65sp _cy951hhy8mw82q69dkjgsax6jh39est _globalsign-domain-verification=49OWFydCiWRZ_S8Vdp-VLIQnUn-kkSxNGgyJMa_138 _globalsign-domain-verification=6bP9qCGkjtv6lK1oUUk1GW_aLlwQ_rTa1zcOrqYRVM _globalsign-domain-verification=i-eF5zY4dQy_1FzurxY-vB_ehho_ANc_RUBJNFcEiB _globalsign-domain-verification=y-WbZfGH3iscpkgt-BmoaO4oBPfJ1RVC-VsPFSFLIe _qeapzxdelh7xfhnlqcuywo7ygi7hifv _validation-contactemail webadmin-devops@merckgroup.com cmbglg0tbxlzvxgtmc7mr45jc7wxl9w4 globalsign-domain-verification=0B0F53EC216D660702AE4A9A63D72F74 globalsign-domain-verification=0B6BE80F6F80EB75317351E4028F99FA globalsign-domain-verification=2B6B5C4C6BBB5B5AAE6F089837878D86 globalsign-domain-verification=3263E2B0098AC99D0EAE1857F3721EC2 globalsign-domain-verification=4b8078824d1dae9350e707486ba9ddcf globalsign-domain-verification=7E9C6273286D016BC739F611C23B14B3 globalsign-domain-verification=89F2BF086C30F3085DED32FBBB0991A3 globalsign-domain-verification=9312CD11FDE849F8FCAA78D6BCF99770 globalsign-domain-verification=B950605920163BED51E14CB3C71113BB globalsign-domain-verification=BD227E1F68FD41038F4DAD17EF9A42BB globalsign-domain-verification=c000b885bf4ac44d3c1ae3a95c241dde globalsign-domain-verification=dface27f0430d7d08dfadc50dae06cbe globalsign-domain-verification=f18a5fb3e440e14833097a09ffff7640 google-site-verification=KKFNroCgQrT3ZAFS7xbHZcXZsBhazWIB3vtKfOb6ouM google-site-verification=O9x5KvwEgll7z5DhE7KwBzaHYHIwh2LjiLwfWZdO5kE google-site-verification=ZC0ucf6BRwGfNGBgaSbxM5KdOZnUrckPsTDLMlRoLMs google-site-verification=fOh8OkUz9z2sxgSRHJAX7-q6I5C-HiR3mcm3yj9uU0E SPF v=spf1 include:spf-005f4802.pphosted.com include:spf.protection.outlook.com incl... yandex-verification: fe89f4ca9b23bb00 z88l2xkshn69czfqgmsj9c6d50vqxf7c |
| 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), 63 ms totalPASS
https://sigmaaldrich.com
63 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://sigmaaldrich.com | 301 | 63 ms | HTTP/1.1 |
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
HTTP → HTTPS
Consistent
ADomain Intelligencesigmaaldrich.com — via Key-Systems GmbH, 28 years, 1 months old, hosted on INCAPSULA - Incapsula Inc, USPASS
6 days
July 19, 2026
77 days
Issued by GlobalSign nv-sa
28 years, 1 months
Registered July 20, 1998
Not enabled
Protects against DNS spoofing
INCAPSULA - Incapsula Inc, US
ASN AS19551
45.60.86.93
Key-Systems GmbH
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
Consider enabling auto-renewal to prevent accidental expiration.
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