{"id":273,"date":"2015-01-10T16:20:10","date_gmt":"2015-01-10T16:20:10","guid":{"rendered":"https:\/\/hhardsoft.wordpress.com\/?p=273"},"modified":"2015-01-10T16:20:10","modified_gmt":"2015-01-10T16:20:10","slug":"protege-tu-gestor-de-arranque-en-tu-s-o-basado-en-gnulinux","status":"publish","type":"post","link":"https:\/\/hardsoftsecurity.es\/index.php\/2015\/01\/10\/protege-tu-gestor-de-arranque-en-tu-s-o-basado-en-gnulinux\/","title":{"rendered":"Protege tu gestor de arranque en tu S.O basado en GNU\/Linux"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?ssl=1\"><img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" data-attachment-id=\"275\" data-permalink=\"https:\/\/hardsoftsecurity.es\/index.php\/2015\/01\/10\/protege-tu-gestor-de-arranque-en-tu-s-o-basado-en-gnulinux\/linux\/\" data-orig-file=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?fit=1920%2C1200&amp;ssl=1\" data-orig-size=\"1920,1200\" data-comments-opened=\"1\" data-image-title=\"Linux\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?fit=800%2C500&amp;ssl=1\" class=\"aligncenter size-full wp-image-275\" src=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?resize=676%2C423&#038;ssl=1\" alt=\"Linux\" width=\"676\" height=\"423\" srcset=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?w=1920&amp;ssl=1 1920w, https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?resize=300%2C188&amp;ssl=1 300w, https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?resize=768%2C480&amp;ssl=1 768w, https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?resize=1024%2C640&amp;ssl=1 1024w, https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?resize=1200%2C750&amp;ssl=1 1200w, https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/linux.png?w=1600&amp;ssl=1 1600w\" sizes=\"(max-width: 676px) 100vw, 676px\" \/><\/a><\/p>\n<p>Antes de empezar a ver cuales son las maneras de proteger tu gestor de arranque, debemos saber que estamos tocando, es decir <strong><em>\u00bfQu\u00e9 es el gestor de arranque?.<\/em><\/strong><\/p>\n<p>El gestor de arranque es un men\u00fa, donde puedes seleccionar desde donde quieres iniciar un sistema operativo, como podr\u00eda ser desde el lector de CD\/DVD, HD o un pendrive.<!--more--><\/p>\n<p>Para evitar que personas no autorizadas tengan acceso a la edici\u00f3n de las opciones de arranque de los distintos sistemas operativos que controla el GRUB se puede establecer una contrase\u00f1a:<\/p>\n<p><strong>Definici\u00f3n de contrase\u00f1as en el GUB en modo texto:<\/strong><\/p>\n<p>Durante este proceso, vamos a modificar el fichero que almacena la configuraci\u00f3n del gestor de arranque, por lo que es recomendable realizar una copia de seguridad del mismo, para poder restaurarla en caso de que se produjese alg\u00fan error en el arranque como consecuencia de las modificaciones realizadas.<\/p>\n<p>Lo primero que haremos ser\u00e1 modificar el archivo <em>\/etc\/default\/grub,\u00a0<\/em>para que se nos muestro el menu del gestor de arranque para introducir la contrase\u00f1a que elegiremos m\u00e1s adelante:<\/p>\n<blockquote>\n<p style=\"text-align:center;\">sudo nano \/etc\/default\/grub<\/p>\n<\/blockquote>\n<p>Una vez dentro del este archivo buscaremos las siguientes l\u00edneas:<\/p>\n<blockquote>\n<p style=\"text-align:center;\">GRUB_HIDDEN_TIMEOUT=0<br \/>\nGRUB_HIDDEN_TIMEOUT_QUIET=true<\/p>\n<\/blockquote>\n<p>Dej\u00e1ndolas de la siguiente manera:<\/p>\n<blockquote>\n<p style=\"text-align:center;\">#GRUB_HIDDEN_TIMEOUT=0<br \/>\n#GRUB_HIDDEN_TIMEOUT_QUIET=true<\/p>\n<\/blockquote>\n<p>Despu\u00e9s haremos una copia de los archivos que vamos a modificar para posibles futuros errores, del siguiente archivo que vamos a modificar:<\/p>\n<blockquote>\n<p style=\"text-align:center;\">cd \/boot\/grub<\/p>\n<p style=\"text-align:center;\">sudo cp grub.cfg \/home\/david\/copiagrub.cfg<\/p>\n<\/blockquote>\n<p>El siguiente paso es hacer una copia del archivo de configuraci\u00f3n del gestor de arranque, lo haremos haciendo lo siguiente:<\/p>\n<blockquote>\n<p style=\"text-align:center;\">sudo cp \/etc\/grub.d\/00_header \/home\/david\/00_headercopia<\/p>\n<\/blockquote>\n<p>El siguiente paso es acceder al archivo de configuraci\u00f3n del gestor de arranque:<\/p>\n<blockquote>\n<p style=\"text-align:center;\">sudo nano \/etc\/grub.d\/00_header<\/p>\n<\/blockquote>\n<p>Y al final de todo el documento abierto introduciremos las siguientes l\u00edneas:<\/p>\n<blockquote>\n<p style=\"text-align:left;\">cat &lt;&lt; EOF<\/p>\n<p style=\"text-align:left;\">set superuser=&#8221;<em>usuario<\/em>&#8220;<\/p>\n<p style=\"text-align:left;\">password <em>usuario<\/em> <em>contrase\u00f1a<\/em><\/p>\n<p style=\"text-align:left;\">EOF<\/p>\n<\/blockquote>\n<p>Quedando de la siguiente manera:<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/seleccic3b3n_001.png?ssl=1\"><img data-recalc-dims=\"1\" decoding=\"async\" data-attachment-id=\"274\" data-permalink=\"https:\/\/hardsoftsecurity.es\/index.php\/2015\/01\/10\/protege-tu-gestor-de-arranque-en-tu-s-o-basado-en-gnulinux\/seleccion_001-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/seleccic3b3n_001.png?fit=198%2C111&amp;ssl=1\" data-orig-size=\"198,111\" data-comments-opened=\"1\" data-image-title=\"Selecci\u00f3n_001\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/seleccic3b3n_001.png?fit=198%2C111&amp;ssl=1\" class=\"aligncenter size-full wp-image-274\" src=\"https:\/\/i0.wp.com\/hardsoftsecurity.es\/wp-content\/uploads\/2015\/01\/seleccic3b3n_001.png?resize=198%2C111&#038;ssl=1\" alt=\"Selecci\u00f3n_001\" width=\"198\" height=\"111\" \/><\/a><\/p>\n<p>Proceso de recogida de informaci\u00f3n y prueba de la modificaci\u00f3n de los archivos realizada por David De Maya Merras. @DavidDeMaya<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Antes de empezar a ver cuales son las maneras de proteger tu gestor de arranque, debemos saber que estamos tocando, es decir \u00bfQu\u00e9 es el gestor de arranque?. El gestor &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[4,7],"tags":[],"class_list":["post-273","post","type-post","status-publish","format-standard","hentry","category-hardening-linux","category-seguridad-informatica"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Protege tu gestor de arranque en tu S.O basado en GNU\/Linux - Hardsoft Security<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hardsoftsecurity.es\/index.php\/2015\/01\/10\/protege-tu-gestor-de-arranque-en-tu-s-o-basado-en-gnulinux\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Protege tu gestor de arranque en tu S.O basado en GNU\/Linux - Hardsoft Security\" \/>\n<meta property=\"og:description\" content=\"Antes de empezar a ver cuales son las maneras de proteger tu gestor de arranque, debemos saber que estamos tocando, es decir \u00bfQu\u00e9 es el gestor de arranque?. 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