ustclug.org
Last scanned Aug 24, 2026, 1:22 PM
Overall score
Great
Summary
This website uses Cloudflare Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is fair (55/100) and accessibility is excellent (95/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Missing <title>.
- United States
- Hosted on Cloudflare
Top issues to fix
9 issues found · 4 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing title tag
SEOAdd a unique, descriptive <title> tag — it's the single most important on-page SEO element.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
+3 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
128 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Contact
Email, phone, and address published on this site's own pages.
Source: https://ustclug.org/contact
Meta tags
- Title
- Description
- Canonical
- https://lug.ustc.edu.cn/
- Language
- en
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.21.34.197
- 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
- ustclug.org
- Valid from
- Jul 6, 2026
- Valid to
- Oct 4, 2026
- Days until expiry
- 40
- SAN domains
- ustclug.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
1 internal · 1 external · 1 broken
Images
0 total · 0 missing alt
Scripts / Styles
1 scripts · 0 stylesheets
JS / CSS size
0 B · 0 B
Page size
760 B
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing <title>
- Missing meta description
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Missing viewport meta tag
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://ustclug.org
- Final URL
- https://ustclug.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 128 ms
- HTML size
- 760 B
- Redirect chain
- https://ustclug.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does ustclug.org use?
- ustclug.org is built with Cloudflare Analytics.
- Is ustclug.org secure (HTTPS)?
- Yes. ustclug.org uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 4, 2026.
- Who hosts ustclug.org?
- ustclug.org is hosted on Cloudflare, behind Cloudflare CDN.
- What is ustclug.org's SEO score?
- ustclug.org scored 55/100 for SEO in the latest analysis (fair).
- What is ustclug.org's overall website score?
- ustclug.org has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
- Is ustclug.org hiring?
- ustclug.org has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card