{"id":4397,"date":"2020-10-30T22:05:08","date_gmt":"2020-10-30T21:05:08","guid":{"rendered":"https:\/\/webhosting.de\/?p=4397"},"modified":"2020-10-30T22:05:08","modified_gmt":"2020-10-30T21:05:08","slug":"dnssec","status":"publish","type":"post","link":"https:\/\/webhosting.de\/es\/dnssec\/","title":{"rendered":"dnssec"},"content":{"rendered":"

Extensiones de seguridad del sistema de nombres de dominio<\/h2>\n

El dnssec es un conjunto de normas en el Internet<\/a>que proporcionan una garant\u00eda de los mecanismos de seguridad. Estos tambi\u00e9n est\u00e1n sujetos a la autenticidad e integridad de Datos<\/a>. Un participante del dnssec puede verificar ciertos datos de la zona. Tambi\u00e9n puede comprobar si los datos de la zona DNS son id\u00e9nticos a los datos que un creador est\u00e1 autorizado por la zona.<\/p>\n

No hay cifrado de los datos<\/h2>\n

El dnssec fue desarrollado para combatir el poinsonaje de la memoria cach\u00e9. Las firmas digitales est\u00e1n aseguradas durante la transferencia de los registros de recursos. La autentificaci\u00f3n nunca tiene lugar en los servidores o en los clientes. Con dnssec no se encriptan los datos. El criptosistema asim\u00e9trico. El propietario de una informaci\u00f3n en particular se llama el servidor maestro. Aqu\u00ed es tambi\u00e9n donde se encuentra la zona a asegurar. Cada registro est\u00e1 firmado con una clave privada o una clave secreta. La autenticidad y la integridad pueden ser validadas con una clave p\u00fablica. La extensi\u00f3n EDNS es preferida por dnssec. Con esta ampliaci\u00f3n se pueden utilizar par\u00e1metros adicionales. La limitaci\u00f3n de tama\u00f1o de 512 bytes tambi\u00e9n se elimina con esta ampliaci\u00f3n. Se necesitan mensajes DNS m\u00e1s largos si se va a transmitir una clave o firma.<\/p>\n

\u00bfC\u00f3mo funciona el ADN?<\/h2>\n

En el RR, es decir, el Registro de Recursos, la informaci\u00f3n es proporcionada por dnssec. Estos aseguran la autenticidad de la informaci\u00f3n con una firma digital. El servidor maestro de la zona es el propietario de esta informaci\u00f3n. Tambi\u00e9n es la autorizada. Para cada zona que se va a asegurar, hay una clave de canto de zona. El par consiste en llaves p\u00fablicas y privadas. La parte p\u00fablica de la llave de la zona est\u00e1 incluida en el archivo de la zona como Registro de Recursos de DNSKEY. La clave privada asegura que cada RR individual est\u00e9 firmado digitalmente en la zona. Para ello se completa un Registro de Recursos, que es entonces el Registro de Recursos RRSIG. Esto contiene la firma para el registro DNS.
\nPara cada una de estas transacciones se env\u00eda un RRSIG-RR junto con el registro normal de recursos. Para un traslado en la zona, los esclavos lo reciben primero. Esto se almacena en un cach\u00e9 con una buena resoluci\u00f3n. Lo \u00faltimo que hace el RR es terminar en el rev\u00f3lver que lo solicit\u00f3. Con la clave de la zona p\u00fablica, el RR puede validar la firma.<\/p>\n

La evaluaci\u00f3n<\/h2>\n

Con dnssec, los resolutores de DNS son los dispositivos finales, como una computadora o un tel\u00e9fono inteligente, en los que no se pueden validar los registros. Los Stubresolvers son programas simplemente construidos que pueden resolver completamente un nombre. Incluso en un servidor de nombres recursivo. Para resolver un nombre, el stubresolver env\u00eda una solicitud a un servidor de nombres en la red local, o en la red de ISP<\/a>, pronunciado Proveedores de Servicios de Internet.<\/p>\n

Un bit de DO se establece, esto puede decirle a la resoluci\u00f3n del servidor de nombres que el registro debe ser validado. El stubresolver debe soportar la extensi\u00f3n EDNS del dnssec. As\u00ed que el servidor tambi\u00e9n puede ser confogurado. Esto significa que la validaci\u00f3n siempre se puede realizar.<\/p>\n

Esto es independiente del contenido y la presencia del bit DO. Si el servidor devuelve un error general, algo ha salido mal. Si tuvo \u00e9xito, el servidor da una respuesta de bits AD. AD significa Datos Autentificados. En el caso de un stubresolver no es posible detectar si el error es causado por la validaci\u00f3n fallida o si tiene otra causa. Las causas pueden ser un fallo de alimentaci\u00f3n, o un fallo del servidor de nombres en el nombre de dominio solicitado.<\/p>","protected":false},"excerpt":{"rendered":"

Domain Name System Security Extensions Die dnssec ist eine Reihe von Standarten im Internet, die eine Gew\u00e4hrleistung von Sicherheitsmechanismen geben. Diese unterliegen auch der Authentizit\u00e4t und der Integrit\u00e4t der Daten. Ein Teilnehmer des dnssec kann bestimmte Zonendaten verifizieren. Dieser kann auch pr\u00fcfen ob die DNS-Zonendaten identisch sind mit denen die ein Ersteller von der Zone 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