简体中文
freelearninglist.org
The best free edu-things on the internet, ranked in order of amazingness, and neatly categorized. Includes YouTube channels, Podcasts, eBooks, Courses, and more. Provided as a free service by The School of Thought International, a 501c3 nonprofit organization providing Creative Commons critical thinking resources.
At a glance
- Category
- Other
- Language
- English
- Paid-content signal
- No paid content foundObserved
- Registered
- 2020
- Hosting
- Akamai Connected CloudInferred
- HTTPS certificate trusted
- PassedObserved
- Last updated
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Website Overview
Identifiable technologies and additional version or configuration signals make the service easier to fingerprint, which may help targeted scanners narrow their checks. An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.
Domain and Registration
Registered in 2020, this domain has about 6 years of history. That suggests continuity, although ownership and purpose may have changed. The domain uses the common .org extension, which is not an independent safety signal.
DNS and Email
MX records exist, but SPF, DKIM and DMARC were not detected. Protection against domain impersonation may be incomplete. Nameservers are provided by linode.com, indicating managed DNS hosting. MX records point to the freelearninglist.org email service. No CNAME was found; the observed records resolve directly to addresses. DNSSEC signatures were not detected, so this additional DNS authenticity protection is not confirmed.
TLS and Certificates
The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.
HTTP and Browser Security
The Server header exposes the software version: nginx/1.24.0 (Ubuntu). This makes version-targeted checks easier, but is not proof of an exploitable vulnerability. X-Powered-By exposes backend information: Craft CMS. The response lacks these common security headers: HSTS, CSP, Referrer-Policy, Permissions-Policy. No obvious internal addresses or debug information were found in the headers. No explicit CDN or WAF marker was found in the response headers.
Technology Stack Analysis
The public page identifies jQuery, Google Analytics, nginx 1.24.0, with exact versions exposed for 1 technologies. These details can narrow vulnerability checks, although exposure alone is not a vulnerability.
Search and Social Sharing
The meta description has 345 characters and may be shortened in search results. No homepage canonical URL was detected. If duplicate URLs exist, consolidation may be less explicit. Open Graph is partially configured; og:type is missing. The title has 22 characters, within a common display range. The observed directives allow indexing and link following.
Hosting and Email
Akamai Connected Cloud
Fremont, California, United States
Inferred
45.33.50.23
Registration details
| Registrar | Synergy Wholesale Accreditations Pty Ltd |
|---|---|
| Registered | 2020-02-11 |
| Expires | 2027-02-11 |
| Domain status | active |
| Nameservers | ns1.linode.com、ns2.linode.com、ns3.linode.com、ns4.linode.com、ns5.linode.com |
| DNSSEC | unsigned |
DNS records
| Type | Name | Value | TTL | Priority |
|---|---|---|---|---|
| A | freelearninglist.org | 45.33.50.23 | 86400 | — |
| AAAA | freelearninglist.org | 2600:3c01::f03c:95ff:fecd:a80b | 86400 | — |
| MX | freelearninglist.org | mail.freelearninglist.org | 86400 | 10 |
| NS | freelearninglist.org | ns1.linode.com | 86400 | — |
| NS | freelearninglist.org | ns2.linode.com | 86400 | — |
| NS | freelearninglist.org | ns3.linode.com | 86400 | — |
| NS | freelearninglist.org | ns4.linode.com | 86400 | — |
| NS | freelearninglist.org | ns5.linode.com | 86400 | — |
TLS and certificates
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=UTF-8 |
| cache-control | public, max-age=86400 |
| server | nginx/1.24.0 (Ubuntu) |
| x-frame-options | SAMEORIGIN |
| x-content-type-options | nosniff |
Identified technologies
Pages, Search and Sharing
| Meta description | The best free edu-things on the internet, ranked in order of amazingness, and neatly categorized. Includes YouTube channels, Podcasts, eBooks, Courses, and more. Provided as a free service by The School of Thought International, a 501c3 nonprofit organization providing Creative Commons critical thinking resources. |
|---|---|
| Canonical URL | Not detected |
| Language | English (default) |
| Twitter Card | Not detected |
Social Sharing Preview
3 fieldsrobots.txt (opens in a new tab)
HTTP 404No robots.txt found
Sitemaps
0No sitemaps found
Recent Updates
- Website images
- Screenshots
- Network details
- Website Technologies
- Pages and Search Information
- TLS and certificates
- DNS Information
- Domain Registration
- Website Description
User reviews (0)