Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DRedirect ChainAction2 redirect(s), 1503 ms totalFIX
https://sciencemag.org
679 ms · HTTP/1.1
https://www.sciencemag.org/
631 ms · HTTP/1.1
https://www.science.org/
193 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://sciencemag.org | 301 | 679 ms | HTTP/1.1 | Apache/2.4.66 () PHP/7.4.33 |
| 2 | https://www.sciencemag.org/ | 301 | 631 ms | HTTP/1.1 | cloudflare |
| 3 | https://www.science.org/ | 200 | 193 ms | HTTP/1.1 | cloudflare |
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
BTLS Certificate Expiry & Recommendations186 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 Records2 A records, 171 ms lookupPASS
| A | 52.8.62.150, 54.151.119.244 |
| AAAA | — |
| CNAME | — |
| NS | ns02.aaas.org, ns01.aaas.org, ns03.aaas.org |
| MX | — |
| TXT | facebook-domain-verification=wg09i5246crh70b536l2hagkr1x0p9 ca3-15e5411404d7491896a4f30f021f6cdb google-site-verification=G822PgSFgz2vPo3Fu0C9bLXb58t_1knzSqDSspCULwc google-site-verification=W7u_zrZknuKuot7tAWIfvwVkgjrL6gxpRwQIyQZElWM google-site-verification=4cTnldeRolO0LyfYFtFwwqJ2zc1THuMUJO7Iuz7lhAw |
| 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.
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.
Learn more ▾ ▴
SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.
Source: RFC 7208 (SPF)
A+Crawlabilityrobots.txt present, sitemap with 6 URLsPASS
Sitemap: https://www.science.org/sitemap_index.xml
Sitemap: https://www.science.org/sitemap-index-1.txt
User-agent: *
Disallow: /action
Disallow: /help
Disallow: /search
Disallow: /feedback
Disallow: /page/account-confirmation-thanks
Disallow: /media
Disallow: /medical-research
Disallow: /servlet/linkout
Disallow: /na101/
Disallow: /na101v1/
Disallow: /na102/
Disallow: /doi/mlt/
Disallow: /pb/widgets
Disallow: /author
Allow: /action/showFeed
Allow: /action/showJournal
Allow: /action/showPublications
Allow: /action/showXml
Allow: /action/showTopic
Allow: /action/showBook
Allow: /action/showCoverImage
Allow: /action/downloadSupplement
User-agent: Google-Extended
Disallow: /
User-agent: anthropic-ai
Disallow: /
User-agent: Twitterbot
Allow: /
User-agent: GPTBot
Disallow: /
User-agent: GPTBot
Disallow: /
User-agent: ChatGPT-User
Disallow: /
User-agent: CCBot
Disallow: /
User-agent: Applebot-Extended
Disallow: /
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligencesciencemag.org — via Network Solutions, LLC, 30 years, 5 months old, hosted on AWSPASS
1384 days
April 29, 2030
186 days
Issued by Amazon
30 years, 5 months
Registered April 28, 1996
Not enabled
Protects against DNS spoofing
AWS
ASN AS16509
52.8.62.150
Network Solutions, LLC
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