siu.edu
Southern Illinois University
Last scanned Jul 25, 2026, 2:25 PM · 5 views
Overall score
Great
Summary
Southern Illinois University is the right place for your college experience: in Carbondale, Illinois, SIU offers everything you need, plus extras that inspire. This website uses PHP hosted on SOUTHERN-ILLINOIS-UNIVERSITY - Southern Illinois University Carbondale, US. SEO is good (85/100) and accessibility is fair (70/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.
Southern Illinois University is the right place for your college experience: in Carbondale, Illinois, SIU offers everything you need, plus extras that inspire.
- United States
- Hosted on SOUTHERN-ILLINOIS-UNIVERSITY - Southern Illinois University Carbondale, US
Top issues to fix
7 issues found · 3 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.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
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.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
+1 more issue — details in the sections below.
SEO
2 issue(s) found
Performance
353 ms
Security
HTTPS & header checks
Accessibility
1 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@siu.edu
Meta tags
- Title
- Southern Illinois University
- Description
- Southern Illinois University is the right place for your college experience: in Carbondale, Illinois, SIU offers everything you need, plus extras that inspire.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1, shrink-to-fit=no
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- CDN provider
- —
- IP address
- 131.230.21.130
- ASN
- AS15119 (SOUTHERN-ILLINOIS-UNIVERSITY - Southern Illinois University Carbondale, US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Internet2
- Subject
- siu.edu
- Valid from
- Jan 7, 2026
- Valid to
- Jan 7, 2027
- Days until expiry
- 166
- SAN domains
- siu.edu, *.asa.siu.edu, *.aviation.siu.edu, *.business.siu.edu, *.it.siu.edu, *.lib.siu.edu, *.oit.siu.edu, *.rso.siu.edu, *.siu.edu, *.siuc.edu, *.siuf.org, *.web.siu.edu, blog.careers.siu.edu, blog.chancellor.siu.edu, blog.fashion.siu.edu, blog.news.siu.edu, business.siuc.edu, dev.catalog.siu.edu, dev.foundation.siu.edu, dev.gradcatalog.siu.edu, foreversiu.org, paulsimoninstitute.org, siualumni.com, siuc.edu, siuf.org, www.fermentation.siu.edu, www.lib.siu.edu, www.paulsimoninstitute.org, www.siu.edu, www.siualumni.com, www.siuc.edu, www.siuf.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 8 · H3 1
Links
20 internal · 33 external · 0 broken
Images
25 total · 18 missing alt
Scripts / Styles
12 scripts · 7 stylesheets
JS / CSS size
8.9 KB · 47.1 KB
Page size
45.4 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 27
- sitemap.xml
- Found
- URLs in sitemap
- 59
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
Accessibility issues
- Over half of images are missing alt text
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://siu.edu
- Final URL
- https://siu.edu
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 353 ms
- HTML size
- 45.4 KB
- Redirect chain
- https://siu.edu
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does siu.edu use?
- siu.edu is built with PHP, Bootstrap, jQuery, Google Analytics, Apache.
- Is siu.edu secure (HTTPS)?
- Yes. siu.edu uses TLS 1.3 with a certificate issued by Internet2, valid until Jan 7, 2027.
- Who hosts siu.edu?
- siu.edu is hosted on SOUTHERN-ILLINOIS-UNIVERSITY - Southern Illinois University Carbondale, US.
- What is siu.edu's SEO score?
- siu.edu scored 85/100 for SEO in the latest analysis (great).
- What is siu.edu's overall website score?
- siu.edu has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
- Is siu.edu hiring?
- siu.edu has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card