21cn.com
Title
Last scanned Jul 25, 2026, 12:25 AM · 1 view
Overall score
Fair
Summary
This website uses Nginx hosted on CHINANET-BACKBONE - No.31,Jin-rong Street, CN. SEO is fair (55/100) and accessibility is good (85/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.
- China
- Hosted on CHINANET-BACKBONE - No.31,Jin-rong Street, CN
Top issues to fix
12 issues found · 5 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.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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 viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
+6 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
727 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Meta tags
- Title
- Title
- Description
- Canonical
- Language
- en
- Charset
- UTF-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- CHINANET-BACKBONE - No.31,Jin-rong Street, CN
- CDN provider
- —
- IP address
- 114.217.37.13
- ASN
- AS4134 (CHINANET-BACKBONE - No.31,Jin-rong Street, CN)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- WoTrus CA Limited
- Subject
- *.dlife.cn
- Valid from
- Apr 8, 2026
- Valid to
- Oct 23, 2026
- Days until expiry
- 90
- SAN domains
- *.dlife.cn, dlife.cn
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 2 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 0
Links
0 internal · 0 external · 0 broken
Images
0 total · 0 missing alt
Scripts / Styles
3 scripts · 0 stylesheets
JS / CSS size
234 KB · 0 B
Page size
234 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- No H1 heading found
- Missing viewport meta tag
Scan details
- Requested URL
- https://21cn.com
- Final URL
- https://dlife.cn/
- HTTP status
- 412
- HTTP version
- HTTP/1.1
- Response time
- 723 ms
- HTML size
- 234 KB
- Redirect chain
- https://21cn.com → https://dlife.cn/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does 21cn.com use?
- 21cn.com is built with Nginx.
- Is 21cn.com secure (HTTPS)?
- Yes. 21cn.com uses TLS 1.3 with a certificate issued by WoTrus CA Limited, valid until Oct 23, 2026.
- Who hosts 21cn.com?
- 21cn.com is hosted on CHINANET-BACKBONE - No.31,Jin-rong Street, CN.
- What is 21cn.com's SEO score?
- 21cn.com scored 55/100 for SEO in the latest analysis (fair).
- What is 21cn.com's overall website score?
- 21cn.com has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card