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https://hathitrust.org

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
94
GRADE
A
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Amsterdam, Netherlands
301 Moved Permanently
Checks
9
6 PASS 3 REVIEW
B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.hathitrust.org/
200https://hathitrust.org/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://hathitrust.org/ → https://hathitrust.org/

Consistent

B
TLS Certificate Expiry & Recommendations
55 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

55
days left
0d 30d 60d 90d+

Recommended actions

  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • 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
B
CDN & Delivery
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: AMS)
Got: cf-ray: 9f076c9b59ad0bdb-AMS
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9f076c9b59ad0bdb-AMS
A+
DNS Records
2 A records, 6 ms lookup
PASS
2 A records, 6 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.66.0.37, 162.159.140.37
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2a06:98c1:58::25, 2606:4700:7::25
Info::
3 nameserver(s) configured
Got: blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org
Info::
3 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 6 ms
Got: 6 ms
A172.66.0.37, 162.159.140.37
AAAA2a06:98c1:58::25, 2606:4700:7::25
CNAME—
NSblue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org
MX
2 route3.mx.cloudflare.net
58 route1.mx.cloudflare.net
69 route2.mx.cloudflare.net
TXT
atlassian-domain-verification=r7crdNkrd4xTyO6L9dtFNrg/LsI6IzidDwUjz1XjDJpKagBWiu...
atlassian-sending-domain-verification=e7667d98-58b2-4fb1-bfaf-ef40bd5aec2a
google-site-verification=7jvEHGt2yEogk4ZayHn1YrkTObNMQRqFLK43TkBETzw
google-site-verification=WtHDwMoCLEMmsRU23UKev1gAKJv6KCFhC_b7cVuGNls
SPF v=spf1 include:_spf.atlassian.net include:_spf.mail.umich.edu include:_spf.mx.cl...
CAALookup not available with standard resolver
Resolved in 6 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A
Redirect Chain
1 redirect(s), 254 ms total
PASS
1 redirect(s), 254 ms total
Info::
Single redirect
Got: https://hathitrust.org → https://www.hathitrust.org/ (301)
Info::
WWW normalization redirect

https://hathitrust.org

18 ms · HTTP/1.1

301

https://www.hathitrust.org/

236 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://hathitrust.org30118 msHTTP/1.1cloudflare
2https://www.hathitrust.org/200236 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2a06:98c1:58::25, 2606:4700:7::25
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a06:98c1:58::25, 2606:4700:7::25 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 7 URLs
PASS
robots.txt present, sitemap with 7 URLs
Info::
robots.txt is present
Got: 119 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 7 entries
Info::
Sitemap index with 7 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 119 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php

Sitemap: https://www.hathitrust.org/wp-sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 7 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
hathitrust.org — via Tucows Domains Inc., 18 years, 1 months old
PASS
hathitrust.org — via Tucows Domains Inc., 18 years, 1 months old
Info::
Domain registered until Jun 10, 2027 (1 years, 1 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: Tucows Domains Inc.
Warning::
Registrar lock is NOT enabled
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.
Domain expiry

328 days

June 10, 2027

SSL certificate

55 days

Issued by Let's Encrypt

Domain age

18 years, 1 months

Registered June 10, 2008

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2a06:98c1:58::25

Registrar

Tucows Domains Inc.

Unlocked 3 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar Tucows Domains Inc.
Created June 10, 2008 (18 years, 1 months ago)
Expires June 10, 2027 (1 years, 1 months)
Last Updated February 19, 2025
Name Servers blue.foundationdns.org, blue.foundationdns.com, blue.foundationdns.net
DNSSEC Not enabled
Hosting
IP Address 2a06:98c1:58::25
Data source: rdap (0.2s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

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.

Why this matters

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

A+
HTTP Probe Timing
Total 20 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
5 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
9 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
21 ms
Total Time Total request time from DNS lookup through full response.
21 ms

Connection waterfall

DNS Lookup 5 ms TCP Connect 1 ms TLS Handshake 9 ms Server Processing 6 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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