Errores “No se puede acceder a la red” en Webmaster Tools.
Desde finales de Enero muchos sitios web europeos están recibiendo muchos errores de “Network Unreachable” (No se puede acceder a la red) o Timeouts en las herramientas para webmasters de Google.
Parece ser un error de Google ya que varios webmasters europeos se han encontrado con el mismo problema y con el mismo patrón.
Los errores que muestra webmaster tools:
- No se ha obtenido respuesta.
- No se puede acceder a la red
- No se puede acceder a robots.txt.
La descripción de los errores:
Google ha recibido un error al intentar acceder a esta URL. Por ejemplo, puede ser que hayamos detectado un error DNS o de tiempo de espera. Tal vez su servidor estaba inactivo u ocupado cuando intentamos acceder a la página.
Para comprobar si tienes este mismo error, entra en tu cuenta de Webmaster tools y accede al menú “Diagnóstico” y el submenu “Rastreo Web”.
https://www.google.com/webmasters/tools
Tiempo de espera elevado.
No obstante comprueba que el tiempo de respuesta de tu página este por debajo de los 3 segundos ya que el tiempo de espera de los boots de Google son unos 4 segundos. Sí tus páginas tardan en descargarse más de 4 segundos tienes un problema, ya que google bajará el nivel de rastreo en todo tu sitio, y hasta pasado unos meses no te volverá a rastrear con la misma frecuencia ni con la misma intensidad.
En el siguiente gráfico puedes ver lo que te puede ocurrir si superas el tiempo de descarga. La gráfica superior muestra el número de paginas rastreadas al día, y la gráfica inferior el tiempo medio de descarga de una pagina de tu sitio.
Ten en cuenta que los boots solo hace la petición del html y no incluyen las imágenes, css, js ni otros elementos. Esto es un problema ya que muchos de nosotros no tenemos medios para acelerar el proceso de la descarga de la página ya que influye la ubicación del servidor, los servidores de DNS y estos otros factores:
- DNS Lookup: resuelve el Nombre de Dominio a una dirección IP
- Inicial Connection
- SSL : El protocolo SSL permite la autenticación de servidores, la codificación de datos y la integridad de los mensajes.
- Redirection
- Request Time
- First Byte Download: El primer byte recibido después de generarse la página
- Base Page Download: La descarga completa de la página.
Para emular el tiempo de descarga de un boot de Google, tendrás de hacer un request de tu página desde (MOUNTAIN VIEW, California), ya que la mayoría de boots de Google están en esta ubicación.
Para comprobar el tiempo de respuesta dispones varias herramientas gratuitas y de pago.
http://tools.pingdom.com/ (Herramienta online gratuita)
http://www.keynote.com/products/ (Herramienta de pago online)
Para los que accedéis en versión inglesa, estos son los errores que muestra:
- Network unreachable
- URL timeout
- No response
- robots.txt unreachable
Y la descripción en ingles del error:
Google encountered an error when trying to access this URL. We may have encountered a DNS error or timeout, for instance. Your server may have been down or busy when we tried to access the page.
Eloy: 
msg760: 
Selling: 
Block Paving Driveways Manchester: 
Bertie:
Dios mio, casí dos meses sin escribir!
Hola Edgar,
En Grupo Intercom algunos sites se han topado con el mismo problema. El motivo ha sido un defecto en el hardware del server, una vez se ha cambiado el problema ha sido resuelto.
Saludos.
@sergio: Sí, ya vi en un hilo de webmasters de google que en jobisjob también habéis tenido el mismo problema. ¿Pero el problema ha sido del hardware de Google?
Hello just wanted to give you a quick heads up. The words witihn your write-up seem to be running off the screen in Opera. I’m not positive if this is a formatting concern or something to do with browser compatibility but I figured I’d post to let you know. The design and style appear great though! Hope you get the concern resolved soon. Cheers
Hello,
I too got this message from Google stating “robots.txt unreachable” and “Network unreachable” for 4 URLs of my site. When googling saw your post today, thought could ask for help on how to solve this issue.
Plz dont forget to reply me…
Muy buen artículo. Gracias, me has resuelto algunas de la dudas que tenía sobre lo que ocurría con mi site.
Salu2.
Hola Edgar, antes de nada, felicitarte por este post, que aun siendo del 2009, acabo de caer en él 🙂
De SEO a SEO, por culpa de varias caídas en un servidor de Brasil, Google nos ha tumbado el posicionamiento de una página, ya 3 veces y la “penalización”, entrecomillado porque Google no la trata como tal, pero sí se guarda esa info y
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