Intentando conectar a: https://fcm.googleapis.com/<br>Timeout de conexión: 10s<br>Timeout total: 15s<br><br><hr>Detalles de cURL:<br><pre></pre><hr><br><strong>¡CONEXIÓN EXITOSA!</strong> (Aunque la respuesta HTTP no sea 200, significa que pudimos hablar con el servidor de FCM).<br>Código de estado HTTP recibido: <strong>404</strong><br>Diagnóstico: Código HTTP 404 recibido. Esto es normal para una simple conexión sin autenticación a FCM. ¡La conexión de red funciona!<br><br>--- Fin del script de prueba ---* Host fcm.googleapis.com:443 was resolved.
* IPv6: 2001:4860:4802:38::37, 2001:4860:4802:36::39, 2001:4860:4802:38::39, 2001:4860:4802:36::37
* IPv4: 216.239.38.55, 216.239.36.55, 216.239.36.57, 216.239.38.57
*   Trying [2001:4860:4802:38::37]:443...
* Immediate connect fail for 2001:4860:4802:38::37: Cannot assign requested address
*   Trying [2001:4860:4802:36::39]:443...
* Immediate connect fail for 2001:4860:4802:36::39: Cannot assign requested address
*   Trying [2001:4860:4802:38::39]:443...
* Immediate connect fail for 2001:4860:4802:38::39: Cannot assign requested address
*   Trying [2001:4860:4802:36::37]:443...
* Immediate connect fail for 2001:4860:4802:36::37: Cannot assign requested address
*   Trying 216.239.38.55:443...
* ALPN: curl offers h2,http/1.1
*  CAfile: /etc/pki/tls/certs/ca-bundle.crt
*  CApath: none
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384 / [blank] / UNDEF
* ALPN: server accepted h2
* Server certificate:
*  subject: CN=edgecert.googleapis.com
*  start date: May 12 08:46:47 2025 GMT
*  expire date: Aug  4 08:46:46 2025 GMT
*  subjectAltName: host "fcm.googleapis.com" matched cert's "fcm.googleapis.com"
*  issuer: C=US; O=Google Trust Services; CN=WR2
*  SSL certificate verify ok.
*   Certificate level 0: Public key type ? (256/128 Bits/secBits), signed using sha256WithRSAEncryption
*   Certificate level 1: Public key type ? (2048/112 Bits/secBits), signed using sha256WithRSAEncryption
*   Certificate level 2: Public key type ? (4096/128 Bits/secBits), signed using sha384WithRSAEncryption
* Connected to fcm.googleapis.com (216.239.38.55) port 443
* using HTTP/2
* [HTTP/2] [1] OPENED stream for https://fcm.googleapis.com/
* [HTTP/2] [1] [:method: HEAD]
* [HTTP/2] [1] [:scheme: https]
* [HTTP/2] [1] [:authority: fcm.googleapis.com]
* [HTTP/2] [1] [:path: /]
* [HTTP/2] [1] [accept: */*]
> HEAD / HTTP/2
Host: fcm.googleapis.com
Accept: */*

* Request completely sent off
< HTTP/2 404 
< date: Sat, 31 May 2025 06:55:27 GMT
< content-type: text/html; charset=UTF-8
< server: scaffolding on HTTPServer2
< content-length: 1561
< x-xss-protection: 0
< x-frame-options: SAMEORIGIN
< x-content-type-options: nosniff
< alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
< 
* Connection #0 to host fcm.googleapis.com left intact