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
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations78 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
A+DNS Records1 A records, 15 ms lookupPASS
| A | 3.124.189.64 |
| AAAA | — |
| CNAME | — |
| NS | ns22.digicertdns.com, ns24.digicertdns.net, ns21.digicertdns.com, ns25.digicertdns.net, ns20.digicertdns.com, ns23.digicertdns.net |
| MX | 10 eu-smtp-inbound-1.mimecast.com 10 eu-smtp-inbound-2.mimecast.com |
| TXT | _globalsign-domain-verification=90diKXUg9fFz_vxOVpyAM_k4zm7Cn9SmcaJw1ooEGF SPF v=spf1 a mx ip4:78.136.36.160 include:eu._netblocks.mimecast.com include:msgfocu... MS=ms56712685 google-site-verification=Ky6ki_cbO4ISVZZweNA_exy2ETG-F3oh2sYnizL6EG8 0ed1fe018a5d7f0f1c200e46bfab91897bd71692ec MS=ms43366988 google-site-verification=86GU3Gl-5FPUvA3sdpqqdEaOR4N6wFzsTUerQibrBz0 google-site-verification=QKZdiJUzj1Jngo2wzA5793qKUZErmO3U7Ij-RMtKpas facebook-domain-verification=20cpvbp20xo4bnp264eovhyzx4ymol _globalsign-domain-verification=ypTmCodsGVFAp2zOZqygneXH8KL6TPtuVBQ16WReRG |
| 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), 299 ms totalPASS
https://sciencefocus.com
277 ms · HTTP/1.1
https://www.sciencefocus.com/
22 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://sciencefocus.com | 301 | 277 ms | HTTP/1.1 | nginx |
| 2 | https://www.sciencefocus.com/ | 200 | 22 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 3 URLsPASS
User-agent: GPTBot
Disallow: /
User-agent: *
Disallow: /search
Disallow: /*?preview=true
Disallow: /*//1000$
Disallow: /apple-news-ingest/
Sitemap: https://www.sciencefocus.com/sitemap/index.xml.gz
Sitemap: https://www.sciencefocus.com/sitemap/news.xml.gz
A+Domain Intelligencesciencefocus.com — via Lexsynergy Limited, 26 years, 6 months old, hosted on AWSPASS
261 days
March 4, 2027
78 days
Issued by Let's Encrypt
26 years, 6 months
Registered March 4, 2000
Not enabled
Protects against DNS spoofing
AWS
ASN AS16509
3.124.189.64
Lexsynergy Limited
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