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ON DYNAMIC CONFIGURATION (Stateful Rules) PF (Packet Filter) is the packet filter or firewall configuration based on dynamic (stateful rules) written by Darren OpenBSD. It replaced the filter in OpenBSD Darren Reed IPFilter due to problems with the license, namely that Reed had to give permission to the OpenBSD developers to change the  code. Theo de Raadt said when IPFilter was removed "the software that OpenBSD uses and shares should be free for all (both users and companies), for any purpose you want to be given, including their modification, use, piss on it or even join babies in crushing machines or atomic bombs to drop in Australia. " Due to the discomfort of the OpenBSD team is licensed by Reed, it was decided to replace the entire package rather than lose more time trying to negotiate the issue. The PF has since developed very rapidly, and in OpenBSD 3.8 and have much advantage over other firewall options. Filtering syntax is very similar to IPFilt

BASADO EN CONFIGURACIÓN DINÁMICA (Stateful Rules) PF (Packet Filter) es el filtro de paquetes o cortafuegos basado en configuración dinámica (stateful rules) de OpenBSD escrito por Darren. Reemplazó al filtro de Darren Reed IPFilter en OpenBSD debido a problemas con la licencia, en concreto que Reed tenía que dar autorización a los desarrolladores de OpenBSD para cambiar el  código. Theo de Raadt dijo cuando se eliminó el IPFilter que "el software que OpenBSD utiliza y distribuye debe ser libre para todos (tanto usuarios como compañías), para cualquier fin que quiera dársele, incluyendo su modificación, uso, mear sobre él o incluso su integración en máquinas trituradoras de bebés o en bombas atómicas para arrojar en Australia". Debido a la incomodidad del equipo de OpenBSD con la licencia de Reed, se optó por reemplazar todo el paquete antes que perder más tiempo intentando negociar la cuestión. El PF se ha desarrollado desde entonces muy rápidamente, y en OpenB

INCLUDES AN INTRUSION DETECTION SYSTEM INBOUND AND OUTBOUND PROGRAMS ZoneAlarm is a firewall software produced by Check Point . It includes an intrusion detection system starters, like the ability to control which programs can create outbound connections - the latter is not included in the firewall of Windows XP Service Pack 2.  In ZoneAlarm, program access is controlled by the "zones" in which divide the network connections on your computer . The "zone of confidence" ("trusted zone") typically includes local area network users and can share resources such as files and printers, while the "Internet zone" ("Internet zone") includes everything but is in the "zone of confidence". The user can specify that "permits" (trusted zone client, trusted zone server, Internet zone client, Internet zone server) to a program before you attempt to access the Internet (eg before running for the first time) or, alternatively,

INCLUYE UN SISTEMA DE DETECCIÓN DE INTRUSIONES ENTRANTES Y PROGRAMAS SALIENTES Zone Alarm Cortafuegos Fuente Imagen Wikipedia Japón Dominio Público ZoneAlarm es un cortafuegos por software producido por Check Point. Incluye un sistema de detección de intrusiones entrantes, al igual que la habilidad de controlar que programas pueden crear conexiones salientes — esto último no está incluido en el el cortafuegos de Windows XP Service Pack 2. En ZoneAlarm, el acceso del programa está controlado por las "zonas" en las cuales se dividen las conexiones de red del ordenador. La "zona de confianza" ("trusted zone") normalmente incluye la red de área local del usuario y puede compartir recursos tales como ficheros e impresoras, mientras que la "zona de Internet" ("Internet zone") incluye todo lo que no esté en la "zona de confianza". El usuario puede especificar que "permisos" (trusted zone client, trusted

Encrypt and Decrypt Cryptography (from Greek krypto κρύπτω, "hidden" and γράφω graphos, "write", literally "hidden writing")  is the art ociencia to encrypt and decrypt information using special techniques and is often used to allow an exchange of messages that only can be read by people who are targeted and have the means to decipher. Cryptography Encrypt and Decrypt License Font   More precisely, when it comes to this area of ​​knowledge and science, one should speak of cryptology, which in turn includes both encryption techniques, ie, cryptography itself as complementary techniques, among which is included cryptanalysis, which studies methods for breaking ciphertexts in order to recover the original information in the absence of the keys. Cryptography Concepts In the jargon of cryptography, the original information to be protected is called plaintext or cleartext. Encryption is the process of converting plain text into un

Criptografía, Encriptar y Desencriptar Fuente Imagen Wikimedia Commons Historia - Criptografía: Cifrar y Descifrar Información La Criptografía y la máquina Enigma utilizada por los alemanes durante la II Guerra Mundial La Criptografía (del griego κρύπτω krypto, «oculto», y γράφω graphos, «escribir», literalmente «escritura oculta») es el arte ociencia de cifrar y descifrar información mediante técnicas especiales y se emplea recuentemente para permitir un intercambio de mensajes que sólo puedan ser leídos por personas a las que van dirigidos y que poseen los medios para descifrarlos. Con más precisión, cuando se habla de esta área de conocimiento como ciencia, se debería hablar de criptología, que a su vez engloba tanto las técnicas de cifrado, es decir, la criptografía propiamente dicha, como sus técnicas complementarias, entre las cuales se incluye el criptoanálisis, que estudia métodos empleados para romper textos cifrados con objeto de recuperar la inf

(DATA ENCRYPTION STANDARD) Data Encryption Standard (DES) is an encryption algorithm , ie a method for encrypting information, FIPS chosen as in the United States in 1976, and whose use is widespread throughout the world. The algorithm was initially controversial with classified design elements, a relatively short key length, and the continuing suspicions about the existence of a backdoor for the National Security Agency (NSA). DES was subsequently subjected to intense academic analysis led to the modern concept of block ciphers and their cryptanalysis. Today, DES is considered unsafe for many applications. This is mainly due to the size of 56-bit key is short DES keys are broken in less than 24 hours. Analytical results also exist that show theoretical weaknesses in encryption , but are unfeasible in practice. It is believed that the algorithm is safe in practice variant of Triple DES, although there are theoretical attacks. In recent years, the algorithm has been replace