{"id":14777,"date":"2023-11-15T16:31:00","date_gmt":"2023-11-15T21:31:00","guid":{"rendered":"https:\/\/itdconsulting.com\/?page_id=14394"},"modified":"2024-02-01T10:28:13","modified_gmt":"2024-02-01T15:28:13","slug":"firewall","status":"publish","type":"page","link":"https:\/\/itdconsulting.com\/en\/vps-ecuador\/firewall\/","title":{"rendered":"Firewall"},"content":{"rendered":"

Dada el exponencial crecimiento de los sistemas virtuales, tambi\u00e9n las vulnerabilidades de los sistemas se han incrementado, tanto para usuarios dom\u00e9sticos, como para usuarios servicios VPS Ecuador administrados o VPS Ecuador no administrados, o de otro tipo de servicios m\u00e1s especializados. Por ende, la seguridad es una de las principales preocupaciones. Al respecto, un firewall es un sistema de seguridad de red que permite restringir el tr\u00e1fico tanto entrante y saliente, como interno. <\/p>\n\n\n\n

Esta herramienta es uno de los mecanismos de seguridad b\u00e1sicos que todo sistema debe manejar para tener segura su informaci\u00f3n. Al ser un sistema de prevenci\u00f3n, puede disminuir vulnerabilidades y evitar da\u00f1os mayores al recibir alg\u00fan ciberataque. Es importante destacar que esta medida de seguridad es adaptable tanto a sistemas dom\u00e9sticos como a VPS Ecuador.\u00a0<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

What is a Firewall?<\/strong><\/p>\n\n\n\n

Un firewall es un software o hardware y software dedicado a restringir el acceso de forma selectiva a un sistema. Su finalidad principal es prevenir la actividad maliciosa a trav\u00e9s de la restricci\u00f3n de actividades no autorizadas en la red convencional o servidor VPS Ecuador. <\/p>\n\n\n\n

En ese sentido, pueden considerarse como fronteras que detienen el flujo de actividad al igual que las puertas cortafuego (firewall) de donde viene su nombre. Mediante este mecanismo de restricci\u00f3n permite la administraci\u00f3n segura del tr\u00e1fico web y detiene la propagaci\u00f3n de amenazas, lo cual sirve de medida adicional de protecci\u00f3n de los servidores VPS Ecuador. <\/p>\n\n\n\n

Los firewalls realizan una revisi\u00f3n seg\u00fan par\u00e1metros preprogramados para restringir ciertos tipos de actividad. Asimismo, algunos firewalls pueden realizar un seguimiento del tr\u00e1fico y las conexiones para verificar lo permitido por el sevidor VPS Ecuador, por ejemplo, o el dispositivo dom\u00e9stico. <\/p>\n\n\n\n

Debido a esta funcionalidad tan amplia, los firewalls son herramientas de seguridad para distintos tipos de accesos de usuario. Sus ubicaciones principales son la red o en las computadoras de usuario y en otros puntos de conexi\u00f3n. En ese sentido, destaca su operatividad tambi\u00e9n en un servicio de VPS Ecuador para controlar el tr\u00e1fico entrante y saliente del servidor VPS Ecuador.\u00a0<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Types of Firewalls<\/strong><\/p>\n\n\n\n

Los firewalls se dividen seg\u00fan el tipo de funciones que realizan. Sus m\u00e9todos b\u00e1sicos de filtrado son el seguimiento de la conexi\u00f3n, las reglas de filtrado y los registros de auditor\u00eda. Estos m\u00e9todos determinan la existencia de varios tipos espec\u00edficos de firewall de los cuales describiremos algunos de los m\u00e1s utilizados, tanto en sistemas dom\u00e9sticos como en VPS Ecuador.<\/p>\n\n\n\n

    \n
  1. Static Packet Filtering Firewall<\/strong><\/li>\n<\/ol>\n\n\n\n

    Also known as stateless inspection firewalls, these operate at the OSI network layer. They provide basic filtering by checking individual data packets sent over the network. They evaluate the source and destination of the packets. Since they do not inspect previously accepted connections, they repeat the checking process each time they receive information. <\/p>\n\n\n\n

    This type of filtering is based on IP addresses, ports, and packet protocols. Rules are established through a manually created access control list and are characterized by their rigidity when applied. <\/p>\n\n\n\n

    Due to these characteristics, this firewall requires constant checks for proper functioning and is especially suitable for small networks that can manage it. <\/p>\n\n\n\n

      \n
    1. Circuit-Level Gateway Firewall<\/strong><\/li>\n<\/ol>\n\n\n\n

      Circuit-level gateways operate at the session layer. These firewalls check the functionality of packets during the connection attempt. Once this procedure is completed, the firewall does not go any further. They are similar to proxy firewalls.<\/p>\n\n\n\n

        \n
      1. Stateful Inspection Firewall<\/strong><\/li>\n<\/ol>\n\n\n\n

        Also known as dynamic packet filtering firewalls, they have the ability to monitor ongoing connections and remember previously inspected packets. These firewalls can monitor multiple connection layers, including the application layer. <\/p>\n\n\n\n

        They also block or restrict traffic based on technical properties, such as specific packet protocols, IP addresses, and ports. However, they also monitor and filter the state of connections. This firewall updates filtering rules based on events recorded earlier in the state table by the filtering router.<\/p>\n\n\n\n

        The filtering parameters are established in the configuration of the device and the firewall. Additionally, having state tables allows the firewall to \"learn\" from previous interactions, meaning that types of traffic that caused issues in the past will be restricted in the future. Due to this flexibility and capacity, it is one of the most widely used methods.<\/p>\n\n\n\n

          \n
        1. Proxy Firewall<\/strong><\/li>\n<\/ol>\n\n\n\n

          These application-level firewalls are unique in that they read and filter application protocols. In this sense, they combine application-level inspection or packet inspection with state inspection in their operation. <\/p>\n\n\n\n

          The type of filtering they perform is based on application-level data, rather than basic IP addresses, ports, and packet protocols like packet-based firewalls. By reading and understanding FTP, HTTP, DNS, and other protocols, they can conduct more in-depth investigations and cross-filter different aspects of data.<\/p>\n\n\n\n

          Despite the significant advantages they offer in filtering, they often interfere with incoming data that is not genuinely harmful, slowing down system functionality.<\/p>\n\n\n\n

          \"\"<\/figure>\n\n\n\n
            \n
          1. Next-Generation Firewall (NGFW)<\/strong><\/li>\n<\/ol>\n\n\n\n

            This type of firewall combines the functions of a traditional firewall with intrusion prevention systems. They are designed to identify and prevent specific threats, such as advanced malware. They are used by companies and sophisticated networks to provide a more comprehensive security solution against the most common threats they face. <\/p>\n\n\n\n

            Through the mechanisms described, firewalls allow for control over network processes and ensure a certain level of security. In addition to these protective functionalities, such as preventing the infiltration of malicious agents, firewalls are also used by parental control systems to block access to certain web content. They are also used as restriction mechanisms for web browsing in workplaces, enabling employers to prevent employees from accessing specific web content. Similarly, firewalls are used to manage a controlled internal network at a national level. That is, a government may determine that access to certain web content that opposes its political interests is blocked, as occurs in China.<\/p>\n\n\n\n

            En suma, el sistema firewall es una gran herramienta que potencia las potencialidades del uso de los sistemas y entornos virtualizados brindando mecanismos de prevenci\u00f3n que garantizan la seguridad de las operaciones, como en los servidores VPS Ecuador. Pese a que en el caso de los servidores Linux para VPS Ecuador, se cuenta con un sistema de seguridad, es importante considerar la configuraci\u00f3n de firewall en el VPS Ecuador para resguardar la protecci\u00f3n. No obstante, igual que cualquier otro sistema de seguridad, es necesario adecuarlo a las necesidades espec\u00edficas de nuestros sistemas y gestionar su adecuado funcionamiento, por ello, es importante gestionarlo desde el panel de control del VPS Ecuador tanto para un servicio de VPS Ecuador administrado como en un servicio de VPS Ecuador no administrado. <\/p>","protected":false},"excerpt":{"rendered":"

            Dada el exponencial crecimiento de los sistemas virtuales, tambi\u00e9n las vulnerabilidades de los sistemas se han incrementado, tanto para usuarios dom\u00e9sticos, como para usuarios servicios VPS Ecuador administrados o VPS Ecuador no administrados, o de otro tipo de servicios m\u00e1s especializados. Por ende, la seguridad es una de las principales preocupaciones. Al respecto, un firewall […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":11201,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-14777","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/pages\/14777","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/comments?post=14777"}],"version-history":[{"count":2,"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/pages\/14777\/revisions"}],"predecessor-version":[{"id":14801,"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/pages\/14777\/revisions\/14801"}],"up":[{"embeddable":true,"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/pages\/11201"}],"wp:attachment":[{"href":"https:\/\/itdconsulting.com\/en\/wp-json\/wp\/v2\/media?parent=14777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}