sigmalink.org
2048
Last scanned Jul 27, 2026, 5:43 PM
Overall score
Fair
Summary
This website uses Nginx hosted on SELECTEL - JSC Selectel, RU. SEO is fair (60/100) and accessibility is excellent (100/100). Security scores poor (35/100) and performance excellent (100/100). Top issue: Missing meta description.
- Russia
- Hosted on SELECTEL - JSC Selectel, RU
Top issues to fix
8 issues found · 3 high priority
TLS certificate expires in 12 days
SecurityRenew now (or enable auto-renewal) — an expired certificate blocks visitors with a full-page browser warning.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
+2 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
513 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Meta tags
- Title
- 2048
- Description
- 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
- SELECTEL - JSC Selectel, RU
- CDN provider
- —
- IP address
- 139.100.224.116
- ASN
- AS49505 (SELECTEL - JSC Selectel, RU)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- www.sigmalink.org
- Valid from
- May 10, 2026
- Valid to
- Aug 8, 2026
- Days until expiry
- 12
- SAN domains
- www.sigmalink.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 1 · H3 0
Links
0 internal · 2 external · 0 broken
Images
0 total · 0 missing alt
Scripts / Styles
7 scripts · 3 stylesheets
JS / CSS size
0 B · 0 B
Page size
3.4 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://sigmalink.org
- Final URL
- https://sigmalink.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 513 ms
- HTML size
- 3.4 KB
- Redirect chain
- https://sigmalink.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does sigmalink.org use?
- sigmalink.org is built with Nginx.
- Is sigmalink.org secure (HTTPS)?
- Yes. sigmalink.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Aug 8, 2026.
- Who hosts sigmalink.org?
- sigmalink.org is hosted on SELECTEL - JSC Selectel, RU.
- What is sigmalink.org's SEO score?
- sigmalink.org scored 60/100 for SEO in the latest analysis (fair).
- What is sigmalink.org's overall website score?
- sigmalink.org has an overall SiteGraph score of 72/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card