Bloquear el acceso a sitios web utilizando archivo hosts – cancer – World

La idea de esta entrada surgió luego de escribir sobre lasolución a no poder ver los anuncios de adsense desde mi computadora. Por lo general esto se implementa en escuelas para evitar que los estudiantes accedan a ciertos sitios web de ocio o que no posean fines académicos. A su vez algunos padres también están interesados en este tema para cuidar a sus hijos de visitar sitios web con contenido sensible para ellos. Otra utilidad que se le puede dar a esto es el bloqueo de publicidad en los sitios web. Si bien es una manera que tienen los webmasters de rentabilizar sus sitios a veces si se poseen una gran cantidad de anuncios y sobre todo pop-ups puede resultar ser realmente molesto.

Para bloquear sitios web lo que haremos será abrir la carpetaC:\Windows\System32\drivers\etc y vamos a editar el archivohosts con elbloc de notas o el editor de textos de nuestra preferencia, esto lo hacemos haciendoclick derecho sobre el archivo hosts, luegoclick en abrir.

Abrirá una nueva ventana en la queelegiremos nuestro editor de textos y hacemosclick en aceptar.

Nos encontraremos algunas líneas que contienen la ip127.0.0.1 junto al nombre de los dominios bloqueados,por ejemplo:127.0.0.1 activate.adobe.com, lo que haremos será agregar una nueva línea con la ip 127.0.0.1 junto el dominio del sitio web que queremos bloquear. Hagamos una prueba confacebook.com. Lo que agregaremos a nuestro archivo hosts será127.0.0.1 facebook.com.

Se recomienda hacer un respaldo del archivo hosts antes de editarlo.

Nota: la ip y el dominio están separados por una tabulación.

Puede que en windows 7 necesitemos permisos de administrador para editar el archivo hosts, podemos modificar los permisos de la carpeta etc, perosí no queremos complicarnos tanto, copiamos el archivo hosts y lo pegamos en el escritorio (o cualquier otra carpeta) esta copia que se encuentra en el escritorio la editamos y guardamos. Luego, nuestro nuevo archivo hosts que ha sido editado y se encuentra en el escritorio lo copiamos y pegamos en la carpeta C:\windows\system32\drivers\etc nos preguntará sí queremos remplazar el archivo hosts y le decimos que si.

Una vez agregado el sitio web que queremos bloquear vamos a probar sí realmente ha sido bloqueado. Desde el navegador google chrome observaremos lo siguiente.

Sí hemos hecho todo bien notaremos los resultados en nuestro navegador. Para bloquear anuncios depublicidad y pop-ups debemos averiguar el dominio de donde provienen, es muy común encontrar en sitios de descarga o anime y manga publicidad mediante pop-ups. Cuando estos pop-ups se abran, tomaremos la url del sitio web de la barra de direcciones de nuestro navegador para agregarla en nuestro archivo hosts y realizar el bloqueo.

Al realizar este bloqueo cuando recarguemos nuevamente la página notaremos que no se abrirán los pop-ups.

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