stunnel.org
stunnel: Home
Last scanned Aug 24, 2026, 1:22 PM · 3 views
Overall score
Great
Summary
Home page for stunnel: a multiplatform GNU/GPL-licensed proxy encrypting arbitrary TCP connections with SSL/TLS. This website uses Cloudflare Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is fair (70/100) and accessibility is excellent (90/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Missing canonical link.
Home page for stunnel: a multiplatform GNU/GPL-licensed proxy encrypting arbitrary TCP connections with SSL/TLS.
- United States
- Hosted on Cloudflare
Top issues to fix
7 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
+1 more issue — details in the sections below.
SEO
4 issue(s) found
Performance
484 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Home page for stunnel: a multiplatform GNU/GPL-licensed proxy encrypting arbitrary TCP connections with SSL/TLS.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- stunnel: Home
- Description
- Home page for stunnel: a multiplatform GNU/GPL-licensed proxy encrypting arbitrary TCP connections with SSL/TLS.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.21.46.61
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- stunnel.org
- Valid from
- Aug 11, 2026
- Valid to
- Nov 9, 2026
- Days until expiry
- 76
- SAN domains
- stunnel.org, *.stunnel.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 0
Links
14 internal · 8 external · 2 broken
Images
9 total · 0 missing alt
Scripts / Styles
3 scripts · 4 stylesheets
JS / CSS size
31.0 KB · 0 B
Page size
8.1 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 1
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://stunnel.org
- Final URL
- https://www.stunnel.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 484 ms
- HTML size
- 8.1 KB
- Redirect chain
- https://stunnel.org → https://www.stunnel.org/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does stunnel.org use?
- stunnel.org is built with Cloudflare Analytics.
- Is stunnel.org secure (HTTPS)?
- Yes. stunnel.org uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Nov 9, 2026.
- Who hosts stunnel.org?
- stunnel.org is hosted on Cloudflare, behind Cloudflare CDN.
- What is stunnel.org's SEO score?
- stunnel.org scored 70/100 for SEO in the latest analysis (fair).
- What is stunnel.org's overall website score?
- stunnel.org has an overall SiteGraph score of 84/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card