Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 23.21.216.36 |
| Server Software | nginx |
| Compression | gzip |
|
🔒 🟡 Mixed Content (1 HTTP resources) | The page is served over HTTPS but loads 1 resource(s) over HTTP. This may be blocked in modern browsers. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 23.21.216.36
Server Software nginx
Compression gzip
🔒 🟡 Mixed Content (1 HTTP resources) The page is served over HTTPS but loads 1 resource(s) over HTTP. This may be blocked in modern browsers.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Performance
| DNS Lookup | 4.1 ms |
| TCP Connect | 87.8 ms |
| TLS Handshake | 85.8 ms |
| Time To First Byte (TTFB) | 518.1 ms |
| Content Download | 0.3 ms |
| Total Response Time | 518.5 ms |
DNS Lookup 4.1 ms
TCP Connect 87.8 ms
TLS Handshake 85.8 ms
Time To First Byte (TTFB) 518.1 ms
Content Download 0.3 ms
Total Response Time 518.5 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=31536000; includeSubDomains; preload |
| CSP | ✔ Configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ✔ nosniff |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=31536000; includeSubDomains; preload
CSP ✔ Configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ✔ nosniff
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | OER Commons |
| Meta Description | OER Commons is a dynamic digital library and network. Explore open education resources and join our network of educators dedicated to curriculum improvement. |
| Open Graph Description | OER Commons is a dynamic digital library and network. Explore open education resources and join our network of educators dedicated to curriculum improvement. |
| Open Graph Image | https://oercommons.org/static/newdesign/images/logo-hidpi... |
Title OER Commons Meta Description OER Commons is a dynamic digital library and network. Explore open education resources and join our network of educators dedicated to curriculum improvement. Open Graph Description OER Commons is a dynamic digital library and network. Explore open education resources and join our network of educators dedicated to curriculum improvement. Open Graph Image https://oercommons.org/static/newdesign/images/logo-hidpi... Detected Technologies
| Technology | React Bootstrap Google Analytics Google Tag Manager Cloudflare Nginx |
Technology React Bootstrap Google Analytics Google Tag Manager Cloudflare Nginx
HTTP Headers
| Date
| Thu, 23 Jul 2026 20:00:28 GMT |
| Content-type
| text/html; charset=utf-8 |
| Server
| nginx |
| Vary
| Accept-Language, Cookie, Host |
| Content-language
| en |
| Strict-transport-security
| max-age=31536000; includeSubDomains; preload |
| X-content-type-options
| nosniff |
| Content-security-policy
| upgrade-insecure-requests |
| Content-encoding
| gzip |
Meta Tags
| Viewport | width=device-width, initial-scale=1 |
| Google-site-verification | Yq6bU_Y9TiGwfN5U4awVziY7N89TOM8TzDLuSrTeg3c |
| Description | OER Commons is a dynamic digital library and network. Explore open education resources and join our network of educators dedicated to curriculum improvement. |
Date Thu, 23 Jul 2026 20:00:28 GMT
Content-type text/html; charset=utf-8
Server nginx
Vary Accept-Language, Cookie, Host
Content-language en
Strict-transport-security max-age=31536000; includeSubDomains; preload
X-content-type-options nosniff
Content-security-policy upgrade-insecure-requests
Content-encoding gzip
