cdeledu.com
正保远程教育-专注职业教育和服务
Last scanned Aug 3, 2026, 1:00 PM · 4 views
Overall score
Fair
Summary
正保远程教育（China Distance Education Holdings Ltd., CDEL）成立于2000年，为北京市高新技术企业、联合国教科文组织技术与职业教育培训在中国的试点项目。经教育部批准，�… This website uses jQuery. SEO is fair (55/100) and accessibility is good (75/100). Security scores fair (50/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
正保远程教育（China Distance Education Holdings Ltd., CDEL）成立于2000年，为北京市高新技术企业、联合国教科文组织技术与职业教育培训在中国的试点项目。经教育部批准，常年开展面向多行业、多领域的网络教育，并提供远程多媒体网络教育平台系列产品。
Top issues to fix
15 issues found · 5 high priority
TLS certificate expires in 8 days
SecurityRenew now (or enable auto-renewal) — an expired certificate blocks visitors with a full-page browser warning.
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 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.
+9 more issues — details in the sections below.
SEO
7 issue(s) found
Performance
842 ms
Security
HTTPS & header checks
Accessibility
3 issue(s) found
Score history
+1 overall since Jul 26, 2026
- Overall
- 69
- SEO
- 55
- Security
- 50
- Performance
- 100
- Accessibility
- 75
Organization
Company details published in this site's own structured data.
正保远程教育（China Distance Education Holdings Ltd., CDEL）成立于2000年，为北京市高新技术企业、联合国教科文组织技术与职业教育培训在中国的试点项目。经教育部批准，常年开展面向多行业、多领域的网络教育，并提供远程多媒体网络教育平台系列产品。
Meta tags
- Title
- 正保远程教育-专注职业教育和服务
- Description
- 正保远程教育（China Distance Education Holdings Ltd., CDEL）成立于2000年，为北京市高新技术企业、联合国教科文组织技术与职业教育培训在中国的试点项目。经教育部批准，常年开展面向多行业、多领域的网络教育，并提供远程多媒体网络教育平台系列产品。
- Canonical
- Language
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- GlobalSign nv-sa
- Subject
- *.chinaacc.com
- Valid from
- Jul 11, 2025
- Valid to
- Aug 12, 2026
- Days until expiry
- 8
- SAN domains
- *.chinaacc.com, *.edu.chinaacc.com, *.cdeledu.com, *.med66.com, *.jianshe99.com, chinaacc.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 5 · H3 0
Links
54 internal · 15 external · 20 broken
Images
41 total · 2 missing alt
Scripts / Styles
14 scripts · 2 stylesheets
JS / CSS size
3.1 KB · 3.6 KB
Page size
40.4 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://cdeledu.com
- Final URL
- https://www.cdeledu.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 842 ms
- HTML size
- 40.4 KB
- Redirect chain
- https://cdeledu.com → https://www.cdeledu.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does cdeledu.com use?
- cdeledu.com is built with jQuery.
- Is cdeledu.com secure (HTTPS)?
- Yes. cdeledu.com uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Aug 12, 2026.
- Who hosts cdeledu.com?
- Hosting provider information for cdeledu.com is not available yet.
- What is cdeledu.com's SEO score?
- cdeledu.com scored 55/100 for SEO in the latest analysis (fair).
- What is cdeledu.com's overall website score?
- cdeledu.com has an overall SiteGraph score of 69/100, combining SEO, performance, security, and accessibility.
- Has cdeledu.com's score changed over time?
- cdeledu.com's overall score has improved by 1 point (from 68 to 69) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card