Información Técnica
| Código de estado HTTP | 200 |
| Versión HTTP | HTTP/1.1 |
| HTTPS | ✔ Disponible |
| Dirección IP | 18.245.199.104 |
| Software del servidor | Apache/2.4.58 (Ubuntu) |
| CDN | CDN (Hit from cloudfront) |
| Compresión | gzip |
|
ℹ 🔵 Falta X-Frame-Options | El sitio puede ser incrustado en iframes por terceros (riesgo de clickjacking). |
Código de estado HTTP 200
Versión HTTP HTTP/1.1
HTTPS ✔ Disponible
Dirección IP 18.245.199.104
Software del servidor Apache/2.4.58 (Ubuntu)
CDN CDN (Hit from cloudfront)
Compresión gzip
ℹ 🔵 Falta X-Frame-Options El sitio puede ser incrustado en iframes por terceros (riesgo de clickjacking).
Cadena de Redirecciones
| # | URL | Código de estado HTTP | Estado |
| 1 | https://ck12.org:443 | 301 | HTTP/2 301 |
| 2 | https://www.ck12.org/ | 302 | HTTP/2 302 |
| 3 | https://www.ck12.org/student/ | 200 | HTTP/2 200 |
#1 URL https://ck12.org:443
Código de estado HTTP 301
Estado HTTP/2 301
#2 URL https://www.ck12.org/
Código de estado HTTP 302
Estado HTTP/2 302
#3 URL https://www.ck12.org/student/
Código de estado HTTP 200
Estado HTTP/2 200
Rendimiento
| Resolución DNS | 4.1 ms |
| Conexión TCP | 5.3 ms |
| Negociación TLS | 4.1 ms |
| Tiempo hasta el primer byte (TTFB) | 16.8 ms |
| Descarga de contenido | 0.1 ms |
| Tiempo total de respuesta | 16.9 ms |
Resolución DNS 4.1 ms
Conexión TCP 5.3 ms
Negociación TLS 4.1 ms
Tiempo hasta el primer byte (TTFB) 16.8 ms
Descarga de contenido 0.1 ms
Tiempo total de respuesta 16.9 ms
Seguridad
| HTTPS | ✔ Activado |
| HSTS | ✔ max-age=31536000; includeSubDomains; preload |
| CSP | ✔ Configurado |
| X-Frame-Options | ⚠ No configurado |
| X-Content-Type-Options | ✔ nosniff |
| Política de Referrer | strict-origin-when-cross-origin |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Activado
HSTS ✔ max-age=31536000; includeSubDomains; preload
CSP ✔ Configurado
X-Frame-Options ⚠ No configurado
X-Content-Type-Options ✔ nosniff
Política de Referrer strict-origin-when-cross-origin
HTTP/2 ⚠ HTTP/1.1
Comprobación SEO
Título CK12-Foundation
Tecnologías Detectadas
| Tecnología | Google Analytics Apache |
Tecnología Google Analytics Apache
Cabeceras HTTP
| Content-type
| text/html; charset=utf-8 |
| Date
| Sun, 23 Aug 2026 17:08:22 GMT |
| Server
| Apache/2.4.58 (Ubuntu) |
| Content-encoding
| gzip |
| X-content-type-options
| nosniff |
| Referrer-policy
| strict-origin-when-cross-origin |
| Vary
| Accept-Encoding |
| Via
| 1.1 c522d9b7cbb89aa2f0d375b21455b750.cloudfront.net (CloudFront) |
| Alt-svc
| h3=":443"; ma=86400 |
| Age
| 17317 |
| Content-security-policy
| frame-ancestors 'self' https://*.ck12.org chrome-extension://necpjbiijgficbgfanibojgkcbbooicg; report-uri https://csp-report.ck12.org; report-to ck12-csp-endpoint; |
| Report-to
| { "group": "ck12-csp-endpoint","max_age": 86400,"endpoints": [{ "url": " https://csp-report.ck12.org" }] } |
| Reporting-endpoints
| ck12-csp-endpoint="https://csp-report.ck12.org" |
| Strict-transport-security
| max-age=31536000; includeSubDomains; preload |
| Set-cookie
| flxweb_role=student; Domain=ck12.org; Max-Age=604800; Path=/; expires=Sun, 30-Aug-2026 17:08:22 GMT; secure |
| X-cache
| Hit from cloudfront |
| X-amz-cf-pop
| CDG50-P6 |
| X-amz-cf-id
| ajez_4-S7Edc242-dyYjIgfqJG1mgWmqVMOo4eiV4Fqykxii063aEw== |
Meta Tags
| Fb:app_id | 159884644067996 |
| Viewport | width=device-width, initial-scale=1, minimum-scale=1.0 |
| Google-site-verification | wHx0f-Udlfd7ZNYNrIXpJVpjjO8nSH5RE0jIX8V-jIM |
| Application-name | CK-12 Foundation |
| Msapplication-TileColor | #003300 |
| Msapplication-TileImage |  |
Content-type text/html; charset=utf-8
Date Sun, 23 Aug 2026 17:08:22 GMT
Server Apache/2.4.58 (Ubuntu)
Content-encoding gzip
X-content-type-options nosniff
Referrer-policy strict-origin-when-cross-origin
Vary Accept-Encoding
Via 1.1 c522d9b7cbb89aa2f0d375b21455b750.cloudfront.net (CloudFront)
Alt-svc h3=":443"; ma=86400
Age 17317
Content-security-policy frame-ancestors 'self' https://*.ck12.org chrome-extension://necpjbiijgficbgfanibojgkcbbooicg; report-uri https://csp-report.ck12.org; report-to ck12-csp-endpoint;
Report-to { "group": "ck12-csp-endpoint","max_age": 86400,"endpoints": [{ "url": " https://csp-report.ck12.org" }] }
Reporting-endpoints ck12-csp-endpoint="https://csp-report.ck12.org"
Strict-transport-security max-age=31536000; includeSubDomains; preload
Set-cookie flxweb_role=student; Domain=ck12.org; Max-Age=604800; Path=/; expires=Sun, 30-Aug-2026 17:08:22 GMT; secure
X-cache Hit from cloudfront
X-amz-cf-pop CDG50-P6
X-amz-cf-id ajez_4-S7Edc242-dyYjIgfqJG1mgWmqVMOo4eiV4Fqykxii063aEw==
