Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.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
BCrawlabilityrobots.txt present, sitemap with 0 URLsREVIEW
Search engines may not be able to parse the sitemap. Fix XML validation errors.
An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.
Learn more ▾ ▴
Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.
Source: sitemaps.org / Google Search Central
An empty sitemap provides no value. Add <url> entries for your pages.
An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.
Learn more ▾ ▴
Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.
Source: Google Search Central / sitemaps.org
Sitemap: https://www.jstor.org/sitemap.xml
User-agent: Googlebot
Disallow: /action
Disallow: /api
Disallow: /citation
Disallow: /clockss-manifest
Disallow: /doi/abs
Disallow: /feedback
Disallow: /purchase
Disallow: /register/
Disallow: /stable/full
Disallow: /stable/suppl
Disallow: /stable/view
Disallow: /start-session
Disallow: /stoken
Disallow: /tc/accept
Disallow: /token
Disallow: /topic
Disallow: /ui_log
Disallow: /userimages
Allow: /action/showLogin
Allow: /action/showJournal
Allow: /action/showPublication
Allow: /action/showSubscriptionJournalsAsXml
Allow: /action/showXml
Allow: /doi/xml
User-agent: *
Disallow: /action
Disallow: /api
Disallow: /citation
Disallow: /clockss-manifest
Disallow: /doi/abs
Disallow: /doi/xml
Disallow: /feedback
Disallow: /purchase
Disallow: /register/
Disallow: /stable/full
Disallow: /stable/suppl
Disallow: /stable/view
Disallow: /start-session
Disallow: /stoken
Disallow: /tc/accept
Disallow: /token
Disallow: /topic
Disallow: /ui_log
Disallow: /userimages
Allow: /action/showLogin
Allow: /action/showJournal
Allow: /action/showPublication
Allow: /action/showSubscriptionJournalsAsXml
Allow: /action/showXml
# Disallow crawling for the purposes of training models
# https://support.anthropic.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler
User-agent: ClaudeBot
# https://commoncrawl.org/faq
User-agent: CCBot
# https://platform.openai.com/docs/gptbot
User-agent: GPTBot
# https://developers.google.com/search/docs/crawling-indexing/overview-google-crawlers
User-agent: Google-Extended
Disallow: /
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations132 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 Records4 A records, 105 ms lookupPASS
| A | 151.101.0.152, 151.101.64.152, 151.101.192.152, 151.101.128.152 |
| AAAA | — |
| CNAME | — |
| NS | usnjpr2ns02.ithaka.org, usmiaa1ns03.ithaka.org, usnjpr2ns04.ithaka.org, usnjpr2ns01.ithaka.org, usaeaz1ns03.ithaka.org, usaeaz1ns05.ithaka.org, usnyny1ns05.ithaka.org |
| MX | 10 IthakaHarbors-org.mail.protection.outlook.com |
| TXT | pardot1053043=4a6c81f133c99f6b859af420931577c383a1b1cd4e153d11ddb1b150a902b382 MS=ms59722565 facebook-domain-verification=t7mhq4udodhlfom0rn909rrhmrcq7f google-site-verification=fUzFvqROnu3S1gFEmkwguY42PzRgOFzwg4qQMP24sU4 SPF v=spf1 mx include:spf.protection.outlook.com include:_spf.act-on.net include:u... _globalsign-domain-verification=-lBuNJDFRxDkLkNbYOLBU03PlWjnPqAzBPAVUokhAw k9s299b65mfuu3atd268noj595. openai-domain-verification=dv-EAO0jUA8iKZCqlqYfddXpA3R sending_domain1053043=a4a2b757167b9ba217895b3e2bb19f3873b9db5b7c0e9b4c6dd2c98c32... |
| 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.
ARedirect Chain1 redirect(s), 284 ms totalPASS
https://jstor.org
4 ms · HTTP/1.1
https://www.jstor.org/
279 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://jstor.org | 301 | 4 ms | HTTP/1.1 | Varnish |
| 2 | https://www.jstor.org/ | 200 | 279 ms | HTTP/1.1 | envoy |
See the visual redirect chain in the HTTP Probe tab →
A+Domain Intelligencejstor.org — via Network Solutions, LLC, 30 years, 7 months old, hosted on FastlyPASS
1679 days
February 17, 2031
132 days
Issued by GlobalSign nv-sa
30 years, 7 months
Registered February 16, 1996
Not enabled
Protects against DNS spoofing
Fastly
ASN AS54113
151.101.192.152
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