{"id":19774,"date":"2023-03-29T12:20:48","date_gmt":"2023-03-29T11:20:48","guid":{"rendered":"https:\/\/quike.it\/es\/?p=19774"},"modified":"2023-11-27T13:18:40","modified_gmt":"2023-11-27T12:18:40","slug":"instalacion-y-configuracion-firewall-en-linux-ubuntu","status":"publish","type":"post","link":"https:\/\/quike.it\/es\/instalacion-y-configuracion-firewall-en-linux-ubuntu\/","title":{"rendered":"Instalaci\u00f3n y Configuraci\u00f3n Firewall en Linux UBUNTU"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"19774\" class=\"elementor elementor-19774\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4287a0f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4287a0f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e2f9d23\" data-id=\"e2f9d23\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8d52499 elementor-widget elementor-widget-text-editor\" data-id=\"8d52499\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Cuando se trabaja en servidores <a href=\"https:\/\/quike.it\/es\/category\/informatica\/sistemas-operativos\/linux\/\" target=\"_blank\" rel=\"noopener\"><strong>Linux<\/strong><\/a> que brindar\u00e1n servicios de accesos es probable que sea necesarios instalar y\/o activar un <a href=\"https:\/\/es.wikipedia.org\/wiki\/Cortafuegos_(inform%C3%A1tica)\" target=\"_blank\" rel=\"noopener\"><strong>Firewall<\/strong><\/a> que permita controlar el flujo de ingreso y salida de datos.<\/p><p>Es buena norma que dependiendo del servicio que el servidor brinde, se permita el flujo de datos solo en los puertos que son utilizados por el servicio .<\/p><p>Esta medida es indispensable para evitar eventuales ataques de <a href=\"https:\/\/es.wikipedia.org\/wiki\/Hacker_(seguridad_inform%C3%A1tica)\" target=\"_blank\" rel=\"noopener\"><strong>Hackers.<\/strong><\/a>\u00a0<\/p><p>En este blog hemos aprendido a instalar varios servicios en <strong><a href=\"https:\/\/quike.it\/es\/como-instalar-ubuntu-server-20-04-2\/\" target=\"_blank\" rel=\"noopener\">servidores Linux<\/a>.<\/strong> Hemos <a href=\"https:\/\/quike.it\/es\/como-instalar-postgresql-en-linux\/\" target=\"_blank\" rel=\"noopener\"><strong>instalado la base de datos PostgreSQL<\/strong><\/a>, la<a href=\"https:\/\/quike.it\/es\/como-configurar-el-servidor-sftp-en-ubuntu\/\" target=\"_blank\" rel=\"noopener\"><strong> instalaci\u00f3n del servicio SFTP<\/strong><\/a> y la <a href=\"https:\/\/quike.it\/es\/como-administrar-de-forma-remota-el-servidor-ubuntu-con-ssh\/\" target=\"_blank\" rel=\"noopener\">instalaci\u00f3n de <strong>OpenSSH<\/strong><\/a> para <a href=\"https:\/\/quike.it\/es\/como-administrar-de-forma-remota-el-servidor-ubuntu-con-ssh\/\" target=\"_blank\" rel=\"noopener\"><strong>administrar remotamente el servidor<\/strong><\/a>.<\/p><p>En todos estos casos es buena norma activar o instalar el <strong>Firewall de Linux<\/strong>.<\/p><p>En esta gu\u00eda, veremos <strong>paso a paso<\/strong>, la Instalaci\u00f3n y Configuraci\u00f3n <strong>Firewall<\/strong> (<em>abrir puertos<\/em>) seg\u00fan las necesidades que surjan a medida que instalamos nuevos servicios en el servidor.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38e371d elementor-widget elementor-widget-global elementor-global-23404 elementor-widget-table-of-contents\" data-id=\"38e371d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;container&quot;:&quot;.articulo&quot;,&quot;marker_view&quot;:&quot;bullets&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;icon&quot;:{&quot;value&quot;:&quot;fas fa-circle&quot;,&quot;library&quot;:&quot;fa-solid&quot;},&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tINDICE\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__38e371d\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d38a0f7 articulo elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d38a0f7\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f840535\" data-id=\"f840535\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-27ea933 elementor-widget elementor-widget-heading\" data-id=\"27ea933\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Introducci\u00f3n a UFW<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d19979 elementor-widget elementor-widget-text-editor\" data-id=\"2d19979\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>El <strong>Firewall<\/strong> de <strong>UBUNTU<\/strong> se llama <strong>UFW<\/strong> que es un acr\u00f3nimo de (<em>Firewall sin complicaciones<\/em>). Proteger una red con <strong>UFW<\/strong> es muy f\u00e1cil.<\/p><p><strong>Ubuntu Linux<\/strong> contiene un filtrado de paquetes llamado <a href=\"https:\/\/es.wikipedia.org\/wiki\/Netfilter\" target=\"_blank\" rel=\"noopener\"><strong>Netfilter.<\/strong><\/a> La interfaz de\u00a0 comando de <strong>iptables<\/strong> utilizado para administrar <a href=\"https:\/\/es.wikipedia.org\/wiki\/Netfilter\" target=\"_blank\" rel=\"noopener\"><strong>netfilter.<\/strong><\/a><\/p><p>Sin embargo, <strong>ufw<\/strong> proporciona una interfaz f\u00e1cil de usar para <a href=\"https:\/\/es.wikipedia.org\/wiki\/Netfilter\" target=\"_blank\" rel=\"noopener\"><strong>netfilter,<\/strong><\/a> y es una de las m\u00e1s populares entre los <strong><em>administradores de sistemas<\/em><\/strong> y <em><strong>desarrolladores<\/strong><\/em> que utilizamos <strong>Ubuntu.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-525a194 elementor-widget elementor-widget-heading\" data-id=\"525a194\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Instalaci\u00f3n - reinstalaci\u00f3n - actualizaci\u00f3n de UFW<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bd43bb elementor-widget elementor-widget-text-editor\" data-id=\"6bd43bb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Por defecto <strong>UFW <\/strong>se instala junto con <strong>Ubuntu.<\/strong> Si no se instal\u00f3 por alg\u00fan motivo o el <em><strong>administrador del sistema<\/strong><\/em> anterior lo elimin\u00f3, ejecute el siguiente comando para realizar la instalaci\u00f3n de <strong>UFW.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40cc48d elementor-widget elementor-widget-code-highlight\" data-id=\"40cc48d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo apt install ufw<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a87dbc elementor-widget elementor-widget-image\" data-id=\"4a87dbc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1732.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"blog_1732\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTk3ODMsInVybCI6Imh0dHBzOlwvXC9xdWlrZS5pdFwvZXNcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIzXC8wM1wvYmxvZ18xNzMyLmpwZyJ9\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"782\" height=\"306\" src=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1732.jpg\" class=\"attachment-full size-full wp-image-19783\" alt=\"Instalaci\u00f3n y Configuraci\u00f3n Firewall\" srcset=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1732.jpg 782w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1732-300x117.jpg 300w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1732-768x301.jpg 768w\" sizes=\"(max-width: 782px) 100vw, 782px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-338d87a elementor-widget elementor-widget-text-editor\" data-id=\"338d87a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Como se aprecia en la <a href=\"https:\/\/quike.it\/es\/como-hacer-la-captura-de-pantalla-en-windows\/\" target=\"_blank\" rel=\"noopener\"><strong>captura de pantalla<\/strong><\/a> anterior, el comando sirve sea para realizar una primera instalaci\u00f3n que para la actualizaci\u00f3n de <strong>UFW.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-125f5f3 elementor-widget elementor-widget-heading\" data-id=\"125f5f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Verificaci\u00f3n del estado<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-645c547 elementor-widget elementor-widget-text-editor\" data-id=\"645c547\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>El siguiente paso que debemos hacer, es verificar si UFW est\u00e1 funcionando. Para esto ejecutamos el comando:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-92fcb62 elementor-widget elementor-widget-code-highlight\" data-id=\"92fcb62\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ufw status<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c784e20 elementor-widget elementor-widget-text-editor\" data-id=\"c784e20\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Que nos dir\u00e1 el estado actual sel servicio. En caso que el servicio est\u00e9 inactivo, procederemos a activarlo por medio del comando:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-91ffa28 elementor-widget elementor-widget-code-highlight\" data-id=\"91ffa28\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ufw enable<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17a69c9 elementor-widget elementor-widget-image\" data-id=\"17a69c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1733.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"blog_1733\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTk3ODcsInVybCI6Imh0dHBzOlwvXC9xdWlrZS5pdFwvZXNcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIzXC8wM1wvYmxvZ18xNzMzLmpwZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"799\" height=\"86\" src=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1733.jpg\" class=\"attachment-full size-full wp-image-19787\" alt=\"\" srcset=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1733.jpg 799w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1733-300x32.jpg 300w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1733-768x83.jpg 768w\" sizes=\"(max-width: 799px) 100vw, 799px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c33b31a elementor-widget elementor-widget-text-editor\" data-id=\"c33b31a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Con esto, logramos no solo que el <strong>UFW<\/strong> inicie a trabajar sino que se activar\u00e1 junto con el inicio del servidor.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1bca27b elementor-widget elementor-widget-heading\" data-id=\"1bca27b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Reglas predefinidas e iniciales<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb97ecc elementor-widget elementor-widget-text-editor\" data-id=\"cb97ecc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Ahora verificamos como est\u00e1 trabajando <strong>UFW.<\/strong> Ejecutamos el siguiente comando que nos indica en detalle el servicio que se est\u00e1 ofreciendo.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a41ccc4 elementor-widget elementor-widget-code-highlight\" data-id=\"a41ccc4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ufw status verbose<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-614b191 elementor-widget elementor-widget-text-editor\" data-id=\"614b191\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Las reglas predeterminadas del F<strong>irewall<\/strong> funcionan bien en la mayor\u00eda de los casos, sean estos servidores,\u00a0 computadoras port\u00e1tiles\/terminales de trabajo, ya que solo necesita abrir una cantidad limitada de puertos entrantes.<\/p><p><strong><em>Es una regla \u00f3ptima<\/em><\/strong> ya que cierra todos los puertos en entrada al servidor y es necesario abrir los puertos uno por uno.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7cc2fd7 elementor-widget elementor-widget-image\" data-id=\"7cc2fd7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1734.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"blog_1734\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTk3ODgsInVybCI6Imh0dHBzOlwvXC9xdWlrZS5pdFwvZXNcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIzXC8wM1wvYmxvZ18xNzM0LmpwZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"802\" height=\"123\" src=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1734.jpg\" class=\"attachment-full size-full wp-image-19788\" alt=\"Instalaci\u00f3n y Configuraci\u00f3n Firewall\" srcset=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1734.jpg 802w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1734-300x46.jpg 300w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1734-768x118.jpg 768w\" sizes=\"(max-width: 802px) 100vw, 802px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-955343f elementor-widget elementor-widget-heading\" data-id=\"955343f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">\u00bfC\u00f3mo agregar una nueva regla?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36f3cb1 elementor-widget elementor-widget-text-editor\" data-id=\"36f3cb1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Podemos iniciar a agregar reglas en dos formas. Si sabemos el nombre del servicio que deseamos agregar entre las reglas de tr\u00e1fico, podemos utilizar el comando;<\/p><pre><strong>sudo ufw allow &lt;Nombre del Servicio&gt;<\/strong><\/pre><p>En las siguientes lineas ilustramos los servicios mas comunes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ac43185 elementor-widget elementor-widget-heading\" data-id=\"ac43185\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Habilitar acceso SSH<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-de0ac01 elementor-widget elementor-widget-text-editor\" data-id=\"de0ac01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>para habilitar los permisos de tr\u00e1fico de <a href=\"https:\/\/quike.it\/es\/como-administrar-de-forma-remota-el-servidor-ubuntu-con-ssh\/\" target=\"_blank\" rel=\"noopener\"><strong>OpenSSH<\/strong><\/a> escribimos:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5797c9b elementor-widget elementor-widget-code-highlight\" data-id=\"5797c9b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ufw allow ssh<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-962ba5c elementor-widget elementor-widget-image\" data-id=\"962ba5c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1735.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"blog_1735\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTk3ODksInVybCI6Imh0dHBzOlwvXC9xdWlrZS5pdFwvZXNcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIzXC8wM1wvYmxvZ18xNzM1LmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"804\" height=\"267\" src=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1735.jpg\" class=\"attachment-full size-full wp-image-19789\" alt=\"\" srcset=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1735.jpg 804w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1735-300x100.jpg 300w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1735-768x255.jpg 768w\" sizes=\"(max-width: 804px) 100vw, 804px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cf97423 elementor-widget elementor-widget-text-editor\" data-id=\"cf97423\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Como se puede ver en la <a href=\"https:\/\/quike.it\/es\/como-hacer-la-captura-de-pantalla-en-windows\/\" target=\"_blank\" rel=\"noopener\"><strong>captura de pantalla<\/strong><\/a> anterior, al terminar la ejecuci\u00f3n del comando se permiten el tr\u00e1fico en entrada y salida a trav\u00e9s del <strong>puerto 22<\/strong>, que es el puerto que utiliza el <a href=\"https:\/\/quike.it\/es\/como-administrar-de-forma-remota-el-servidor-ubuntu-con-ssh\/\" target=\"_blank\" rel=\"noopener\"><strong>servicio ssh<\/strong><\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bb1e2bf elementor-widget elementor-widget-heading\" data-id=\"bb1e2bf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Habilitar acceso a PostgreSQL<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e0631e8 elementor-widget elementor-widget-text-editor\" data-id=\"e0631e8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>En el caso que deseamos <strong><a href=\"https:\/\/quike.it\/es\/como-configurar-acceso-remoto-postgresql\/\" target=\"_blank\" rel=\"noopener\">habilitar las reglas de tr\u00e1fico para PostgreSQL<\/a>,<\/strong> ejecutamos:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-407b061 elementor-widget elementor-widget-code-highlight\" data-id=\"407b061\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ufw allow postgres<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7c731f0 elementor-widget elementor-widget-image\" data-id=\"7c731f0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1736.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"blog_1736\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTk3OTMsInVybCI6Imh0dHBzOlwvXC9xdWlrZS5pdFwvZXNcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIzXC8wM1wvYmxvZ18xNzM2LmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"804\" height=\"338\" src=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1736.jpg\" class=\"attachment-full size-full wp-image-19793\" alt=\"Instalaci\u00f3n y Configuraci\u00f3n Firewall\" srcset=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1736.jpg 804w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1736-300x126.jpg 300w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1736-768x323.jpg 768w\" sizes=\"(max-width: 804px) 100vw, 804px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1008efd elementor-widget elementor-widget-text-editor\" data-id=\"1008efd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Quedan habilitados los puertos que se han indicado en fase de<a href=\"https:\/\/quike.it\/es\/como-instalar-postgresql-en-linux\/\" target=\"_blank\" rel=\"noopener\"><strong> instalaci\u00f3n de PostgreSQL<\/strong><\/a> (<em>por defecto el 5432<\/em>)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c0d1e8b elementor-widget elementor-widget-heading\" data-id=\"c0d1e8b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Habilitar acceso FTP<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-afff6b4 elementor-widget elementor-widget-text-editor\" data-id=\"afff6b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>En el caso que deseamos habilitar las reglas de tr\u00e1fico para <a href=\"https:\/\/es.wikipedia.org\/wiki\/Protocolo_de_transferencia_de_archivos\" target=\"_blank\" rel=\"noopener\"><strong>FTP,<\/strong><\/a> ejecutamos:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fec7c5b elementor-widget elementor-widget-code-highlight\" data-id=\"fec7c5b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ufw allow ftp<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18e1a08 elementor-widget elementor-widget-image\" data-id=\"18e1a08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1737.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"blog_1737\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTk3OTQsInVybCI6Imh0dHBzOlwvXC9xdWlrZS5pdFwvZXNcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIzXC8wM1wvYmxvZ18xNzM3LmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"799\" height=\"333\" src=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1737.jpg\" class=\"attachment-full size-full wp-image-19794\" alt=\"\" srcset=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1737.jpg 799w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1737-300x125.jpg 300w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1737-768x320.jpg 768w\" sizes=\"(max-width: 799px) 100vw, 799px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ced916f elementor-widget elementor-widget-text-editor\" data-id=\"ced916f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>El tr\u00e1fico por el <strong>puerto 21<\/strong> ha sido agregado a la lista.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-97f5419 elementor-widget elementor-widget-heading\" data-id=\"97f5419\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Habilitar un puerto espec\u00edfico<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-50a5e03 elementor-widget elementor-widget-text-editor\" data-id=\"50a5e03\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>En el caso que deseamos habilitar un puerto especifico, por ejemplo el <strong>puerto 2574<\/strong>, ejecutamos:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a59c80 elementor-widget elementor-widget-code-highlight\" data-id=\"7a59c80\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ufw allow 2574\/tcp<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04628a3 elementor-widget elementor-widget-image\" data-id=\"04628a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1738.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"blog_1738\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTk3OTUsInVybCI6Imh0dHBzOlwvXC9xdWlrZS5pdFwvZXNcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIzXC8wM1wvYmxvZ18xNzM4LmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"798\" height=\"356\" src=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1738.jpg\" class=\"attachment-full size-full wp-image-19795\" alt=\"Instalaci\u00f3n y Configuraci\u00f3n Firewall\" srcset=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1738.jpg 798w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1738-300x134.jpg 300w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1738-768x343.jpg 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e932a9 elementor-widget elementor-widget-text-editor\" data-id=\"1e932a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>De esta forma podemos habilitar cualquier puerto que sea necesario para la actividad de nuestro servidor.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe957bb elementor-widget elementor-widget-heading\" data-id=\"fe957bb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">\u00bfC\u00f3mo denegar el acceso al puerto o las conexiones?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1cbe3a9 elementor-widget elementor-widget-text-editor\" data-id=\"1cbe3a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Para negar o bloquear el tr\u00e1fico de un puerto espec\u00edfico utilizamos el comando <strong><em>sudo ufw deny &lt;numero puerto&gt;<\/em><\/strong>. Por ejemplo si queremos bloquear el tr\u00e1fico en el <strong>puerto 443<\/strong>, ejecutamos:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c79f00c elementor-widget elementor-widget-code-highlight\" data-id=\"c79f00c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ufw deny 443\/tcp<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee0d714 elementor-widget elementor-widget-image\" data-id=\"ee0d714\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1739.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"blog_1739\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTk3OTYsInVybCI6Imh0dHBzOlwvXC9xdWlrZS5pdFwvZXNcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIzXC8wM1wvYmxvZ18xNzM5LmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"801\" height=\"373\" src=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1739.jpg\" class=\"attachment-full size-full wp-image-19796\" alt=\"\" srcset=\"https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1739.jpg 801w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1739-300x140.jpg 300w, https:\/\/quike.it\/es\/wp-content\/uploads\/sites\/3\/2023\/03\/blog_1739-768x358.jpg 768w\" sizes=\"(max-width: 801px) 100vw, 801px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e97bba4 elementor-widget elementor-widget-heading\" data-id=\"e97bba4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Eliminar las reglas de tr\u00e1fico<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bcade31 elementor-widget elementor-widget-text-editor\" data-id=\"bcade31\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Para eliminar una regla de tr\u00e1fico utilizamos <em><strong>delete.\u00a0<\/strong><\/em>Por ejemplo si queremos eliminar la regla que permit\u00eda el tr\u00e1fico en el <strong>puerto 2574<\/strong>, ejecutaremos:<\/p><pre><strong>sudo ufw delete allow 2574\/tcp<\/strong><\/pre><p>el comando nos responder\u00e1 indicando la acci\u00f3n realizada.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bc9ddc8 elementor-widget elementor-widget-heading\" data-id=\"bc9ddc8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Conclusi\u00f3n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ac72f27 elementor-widget elementor-widget-text-editor\" data-id=\"ac72f27\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>En esta gu\u00eda hemos aprendido sobre la\u00a0 Instalaci\u00f3n y Configuraci\u00f3n <strong>Firewall<\/strong> en <a href=\"https:\/\/quike.it\/es\/como-instalar-ubuntu-server-20-04-2\/\" target=\"_blank\" rel=\"noopener\"><strong>Linux UBUNTU<\/strong><\/a>.<\/p><p>Si tienes alguna duda sobre el tema, por favor deja tu comentario!.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Cuando se trabaja en servidores Linux que brindar\u00e1n servicios de accesos es probable que sea necesarios instalar y\/o activar un Firewall que permita controlar el flujo de ingreso y salida de datos. Es buena norma que dependiendo del servicio que el servidor brinde, se permita el flujo de datos solo en los puertos que son [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":19745,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[26,25,88],"tags":[],"class_list":["post-19774","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","category-sistemas-operativos","category-ubuntu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Instalaci\u00f3n y Configuraci\u00f3n Firewall en Linux UBUNTU -<\/title>\n<meta name=\"description\" content=\"En esta gu\u00eda, veremos paso a paso, la Instalaci\u00f3n y 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