siu.edu

We performed a comprehensive analysis of siu.edu on 2026-06-29. The website returned an HTTP 200 status code with a server response time of 7361ms. The page is served over HTTP/1.1 protocol with Gzip compression enabled, achieving approximately 60.0% size reduction. The total page weight is 45 KB. The website uses a secure HTTPS connection with a valid SSL certificate issued by Internet2 (DV type). The connection is encrypted using TLS 1.3 with the TLS_AES_256_GCM_SHA384 cipher suite and sha256WithRSAEncryption signature algorithm. The certificate covers 32 domain(s) (Subject Alternative Names) and expires on 2027-01-07, which is 192 days from now. The security headers analysis reveals a score of 0/100 (poor). No security headers are configured, which is a significant security concern. However, the site is missing Content-Security-Policy, Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy, which could expose the site and its users to cross-site scripting (XSS), clickjacking, and other web-based attacks. Our technology detection scan identified 9 technologies across 8 categories powering siu.edu. The detected stack includes Bootstrap 4.5.2, Google Analytics 4, Google Tag Manager, Cloudflare, StackPath, Google Fonts, Vimeo, jQuery, and Font Awesome. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, siu.edu receives an overall trust score of 66/100, classified as "Likely Safe".

After conducting a thorough safety and legitimacy analysis, siu.edu receives a trust score of 66/100, which places it in the "Likely Safe" category. This score is calculated by evaluating multiple factors including SSL certificate validity, domain registration history, email authentication protocols, security header configuration, and blacklist status across major threat intelligence databases. The analysis identified several positive trust signals: a valid HTTPS connection protecting data in transit, a valid SSL certificate issued by Internet2 with 192 days until expiration, SPF (Sender Policy Framework) email authentication preventing email spoofing, and DMARC email authentication with a quarantine policy. Areas of concern include: the absence of a Content-Security-Policy header, which leaves the site more vulnerable to cross-site scripting (XSS) attacks, no X-Frame-Options header, which could allow the site to be embedded in malicious iframes (clickjacking), missing Referrer-Policy, potentially leaking URL information to third parties, the domain's WHOIS information is hidden behind a privacy service, making it harder to verify the owner's identity, and DNSSEC is not enabled, leaving DNS queries vulnerable to spoofing attacks. While these issues don't necessarily indicate malicious intent, they represent areas where the website's security posture could be improved. We checked siu.edu against 8 major blacklist databases including Google Safe Browsing, Phishtank, Urlhaus, Openphish, Dnsfilter, Spamhaus Dbl, Surbl, and Virustotal. The domain passed all 8 checks with a clean status, meaning it has not been flagged for phishing, malware distribution, spam, or other malicious activities by any of the tested threat intelligence providers.

Our technology detection engine scanned siu.edu and identified 9 distinct technologies across 8 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. CSS Framework: Bootstrap (version 4.5.2) — provides the styling and responsive layout system for siu.edu. Analytics: Google Analytics 4 — tracks visitor behavior and provides traffic insights for siu.edu. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for siu.edu. CDN: Cloudflare and StackPath — accelerates content delivery by caching assets at edge locations worldwide for siu.edu. Fonts: Google Fonts — delivers web fonts for typography for siu.edu. Video: Vimeo — provides video hosting and playback for siu.edu. JavaScript Library: jQuery — provides utility functions and DOM manipulation for siu.edu. Icon Set: Font Awesome — provides additional functionality for siu.edu. We also extracted the following tracking identifiers: Google Tag Manager container GTM-5DGK6FZ. These IDs can be used to identify other websites operated by the same organization.

siu.edu delivers its homepage in 7361ms (server response time), which is considered slow by industry standards. The total page weight is 45 KB, and we detected 110 resource requests loading assets from 20 third-party domains. A high number of third-party domains can significantly impact page load time due to additional DNS lookups and TLS handshakes required for each domain. The website uses Gzip compression for text-based assets, achieving an estimated 60.0% reduction in transfer size. This reduces bandwidth usage and improves page load times, especially for visitors on slower connections. Asset minification status: 2 out of 7 CSS files and 3 out of 8 JavaScript files are minified. Minifying the remaining 10 unminified file(s) could further reduce page weight by 10-30% for those assets. Minification is a best practice that reduces download sizes without affecting functionality. From an environmental perspective, each page view of siu.edu produces approximately 0.02g of CO₂, earning a carbon rating of A. This places the website among the cleanest on the web, demonstrating efficient use of server resources and optimized content delivery. For reference, the average web page produces about 0.5g of CO₂ per page view. The page weight of 45 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for siu.edu. This typically means the site doesn't have enough real-world Chrome user traffic to generate statistically significant field data, or the domain is not included in the CrUX dataset. Core Web Vitals (LCP, INP, CLS) are important Google ranking factors that measure real user experience.

siu.edu resolves to the IPv4 address 131.230.21.130, but does not support IPv6. IPv6 adoption is increasingly important as IPv4 address space becomes exhausted, and some ISPs and regions are transitioning to IPv6-only connectivity. The domain has 1 A record(s) configured. The domain name system is managed by 4 name servers: ns1.siu.edu, ns3.siu.edu, ns4.siu.edu, and ns5.siu.edu. Having 4 name servers provides good redundancy — if one fails, the others can continue serving DNS queries. The choice of name servers often indicates the DNS hosting provider or CDN service being used. Email for siu.edu is handled by Microsoft 365 with 1 MX records configured: siu-edu.mail.protection.outlook.com. Multiple MX records provide failover redundancy — if the primary mail server is unavailable, email will be routed to the next available server. SPF (Sender Policy Framework) is configured, which specifies which mail servers are authorized to send email on behalf of this domain. This helps prevent email spoofing and improves email deliverability. DMARC (Domain-based Message Authentication, Reporting and Conformance) is configured with a quarantine policy — a moderate setting, directing unauthorized emails to spam/junk folders. DKIM was not detected. Without DKIM, recipients cannot cryptographically verify that emails claiming to be from this domain are authentic. DNSSEC is not enabled for siu.edu. While not critical for most websites, DNSSEC adds an important security layer by ensuring DNS responses haven't been tampered with during transit. Enabling DNSSEC is recommended for domains handling sensitive data or financial transactions.

The homepage of siu.edu contains 361 words of visible text content. This is a moderate amount of content. The page is structured with 8 H2 headings, 1 H3 headings, 0 H4 headings. The page includes 25 images. 19 images (76%) are missing alt text attributes, which is a significant concern for both accessibility and SEO. Screen readers rely on alt text to describe images to visually impaired users, and search engines use alt text to understand image content. Only 24% of images have proper alt text — we recommend adding descriptive alt attributes to all images. The link structure consists of 21 internal links pointing to other pages on the same domain and 40 external links pointing to third-party websites. There are 8 external JavaScript files, 7 CSS stylesheets, and 2 iframes on the page. The site implements the following web standards and features: XML Sitemap (helps search engines discover all pages) and robots.txt (controls search engine crawling behavior). Notable missing features: Schema.org structured data. Adding these could improve search engine discoverability and rich result eligibility. We detected the following payment methods accepted on siu.edu: Discover. Offering multiple payment options including credit cards and digital wallets improves customer trust and can increase conversion rates. The website has social media presence across 3 platforms: Facebook (@SouthernIllinoisUniversityCarbondale), Instagram (@thisissiu), and Tiktok (@thisissiu). An active social media presence is a positive trust indicator and helps build brand awareness and customer engagement.

The title tag for siu.edu is good at 28 characters: "Southern Illinois University". The length is acceptable, though it may be slightly truncated in some search result displays. The meta description is 159 characters (acceptable): "Southern Illinois University is the right place for your college experience: in Carbondale, Illinois, SIU offers everyth...". Google typically displays up to 155-160 characters of the meta description in search results. A compelling meta description with a clear call-to-action can significantly improve click-through rates from search results. The page language is declared as en. Open Graph meta tags are configured with 3/4 recommended fields: OG title ("Southern Illinois University..."), OG description, OG image (social sharing thumbnail), These tags control how the page appears when shared on Facebook, LinkedIn, and other social media platforms that support the Open Graph protocol.