sdss3.org
SDSS-III
Last scanned Jul 26, 2026, 3:19 PM
Overall score
Fair
Summary
This website uses Nginx hosted on Fastly behind Fastly CDN. SEO is fair (65/100) and accessibility is good (85/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Missing meta description.
- United States
- Hosted on Fastly
Top issues to fix
12 issues found · 4 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.
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.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
+6 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
1.92 s
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
- webmaster@sdss3.org
Source: https://sdss3.org/contact.php
Meta tags
- Title
- SDSS-III
- Description
- Canonical
- Language
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
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
- sdss3.org
- Valid from
- Jun 25, 2026
- Valid to
- Sep 23, 2026
- Days until expiry
- 58
- SAN domains
- sdss3.org, www.sdss3.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 2 · H3 3
Links
22 internal · 29 external · 2 broken
Images
24 total · 0 missing alt
Scripts / Styles
8 scripts · 2 stylesheets
JS / CSS size
219 KB · 19.0 KB
Page size
12.0 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 4
- 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
- sitemap.xml not found
Accessibility issues
- Missing <html lang> attribute
- 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://sdss3.org
- Final URL
- https://sdss3.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 1.92 s
- HTML size
- 12.0 KB
- Redirect chain
- https://sdss3.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does sdss3.org use?
- sdss3.org is built with jQuery, Google Analytics, Nginx.
- Is sdss3.org secure (HTTPS)?
- Yes. sdss3.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 23, 2026.
- Who hosts sdss3.org?
- sdss3.org is hosted on Fastly, behind Fastly CDN.
- What is sdss3.org's SEO score?
- sdss3.org scored 65/100 for SEO in the latest analysis (fair).
- What is sdss3.org's overall website score?
- sdss3.org has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.
- Is sdss3.org hiring?
- sdss3.org has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card