{"id":13484,"date":"2020-05-13T11:26:18","date_gmt":"2020-05-13T09:26:18","guid":{"rendered":"https:\/\/www.lisot.com\/com-evitar-la-suplantacio-identitat-del-nostre-correu-electronic\/"},"modified":"2020-05-13T11:26:21","modified_gmt":"2020-05-13T09:26:21","slug":"com-evitar-la-suplantacio-identitat-del-nostre-correu-electronic","status":"publish","type":"post","link":"https:\/\/www.lisot.com\/ca\/com-evitar-la-suplantacio-identitat-del-nostre-correu-electronic\/","title":{"rendered":"Com evitar la suplantaci\u00f3 d&#8217;identitat del nostre correu electr\u00f2nic"},"content":{"rendered":"<p>En l&#8217;article anterior vam indicar <a href=\"https:\/\/www.lisot.com\/suplantacion-de-identidad-en-un-correo-electronico\/\">com pod\u00edem determinar si el correu electr\u00f2nic que rebem \u00e9s d&#8217;un origen fals.<\/a><\/p>\n<p>En aquest article definirem<strong>qu\u00e8 podem fer per a evitar que ens suplantin la nostra identitat gr\u00e0cies als protocols d&#8217;autentificaci\u00f3 de correu electr\u00f2nic<\/strong> <strong>SPF, DKIM y DMARC.<\/strong><\/p>\n<p><strong> <\/strong><\/p>\n<h2><strong>Per qu\u00e8 hauries d&#8217;utilitzar els protocols<\/strong> <strong>SPF, DKIM i DMARC?<\/strong><\/h2>\n<p>Qualsevol que s\u00e0piga un una mica de programaci\u00f3 pot crear-se una eina per a enviar massivament correu des de l&#8217;adre\u00e7a que vulgui, sense ser aquesta seva; per a evitar que aquests phishers es facin passar per tu utilitzant el mateix nom de domini, existeixen solucions. Aqu\u00ed \u00e9s on entren en joc els protocols d&#8217;autenticaci\u00f3 SPF, DKIM i DMARC. Aquests s\u00f3n els principals protocols per a verificar la identitat dels remitents. Aquesta \u00e9s una de les formes m\u00e9s efectives d&#8217;evitar que els phishers i altres estafadors es facin passar per un remitent leg\u00edtim la identitat del qual podrien suplantar utilitzant el mateix nom de domini.<\/p>\n<p>&nbsp;<\/p>\n<h2>Per a qu\u00e8 serveixen els protocols d\u2019autenticaci\u00f3 de correu electr\u00f2nic SPF, DKIM y DMARC<\/h2>\n<ul>\n<li>El <strong>SPF s&#8217;encarrega d&#8217;identificar el correu electr\u00f2nic<\/strong> ja no sols per qui diu ser (pepito@soyreal.com), sin\u00f3 per la IP des d&#8217;on s&#8217;envia i per mitj\u00e0 dels registres del DNS, que han de coincidir amb els servidors de correu SMTP autoritzats a realitzar aquest enviament.<\/li>\n<li>El <strong>DKIM s&#8217;encarrega d&#8217;associar un nom de domini a un missatge<\/strong>, la qual cosa ens permet responsabilitzar de l&#8217;enviament a una persona o organitzaci\u00f3.<\/li>\n<li>Per \u00faltim, <strong>DMARC (que m\u00e9s que un protocol \u00e9s una pol\u00edtica) indica que els correus electr\u00f2nics enviats des d&#8217;aquest domini estan protegits per SPF i\/o DKIM,<\/strong>donant a les eines de correu una s\u00e8rie d&#8217;instruccions en cas que algun d&#8217;ells no sigui validat (per exemple, que es marqui com spam).<\/li>\n<\/ul>\n<h2><img decoding=\"async\" class=\"size-full wp-image-13476 alignleft\" src=\"https:\/\/www.lisot.com\/wp-content\/uploads\/2020\/05\/protocolos-autentificacion-correo-electronico.png\" alt=\"Protocols d'autentificaci\u00f3 del correu electr\u00f2nic\" width=\"730\" height=\"416\" srcset=\"https:\/\/www.lisot.com\/wp-content\/uploads\/2020\/05\/protocolos-autentificacion-correo-electronico-200x114.png 200w, https:\/\/www.lisot.com\/wp-content\/uploads\/2020\/05\/protocolos-autentificacion-correo-electronico-300x171.png 300w, https:\/\/www.lisot.com\/wp-content\/uploads\/2020\/05\/protocolos-autentificacion-correo-electronico-400x228.png 400w, https:\/\/www.lisot.com\/wp-content\/uploads\/2020\/05\/protocolos-autentificacion-correo-electronico-600x342.png 600w, https:\/\/www.lisot.com\/wp-content\/uploads\/2020\/05\/protocolos-autentificacion-correo-electronico.png 730w\" sizes=\"(max-width: 730px) 100vw, 730px\" \/>Avantatges dels protocols de seguretat de correu electr\u00f2nic SPF, DKIM i DMARC<\/h2>\n<p>Tenint aquests tres elements ben configurats estem oferint al receptor la capacitat de destriar si en efecte un correu que li arriba a la safata d&#8217;entrada \u00e9s o no leg\u00edtim.<\/p>\n<p>Cal tenir present que <strong>encara que configurem el SPF, el DKIM i la pol\u00edtica DMARC del nostre correu<\/strong>correctament, encara depenem d&#8217;un quart element que \u00e9s ali\u00e8 al nostre control: l&#8217;eina de correu utilitzada pel receptor; <strong>si aquest no t\u00e9 un m\u00ednim servei de antispam contractat, el receptor no verificar\u00e0 la identitat<\/strong> i encara que vagi marcat com que \u00e9s un correu fals el receptor l&#8217;identificar\u00e0 com a vertader.<\/p>\n<p>Des de <strong><a href=\"https:\/\/www.lisot.com\/empresa-mantenimiento-informatico-barcelona\/\">LISOT Inform\u00e0tica Empresarial a Barcelona<\/a><\/strong> <strong>configurem els filtres de verificaci\u00f3 per als sistemes inform\u00e0tics dels nostres clients.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En l&#8217;article anterior vam indicar com pod\u00edem determinar si el correu electr\u00f2nic que rebem \u00e9s d&#8217;un origen fals. En aquest article definiremqu\u00e8 podem fer per a evitar que ens suplantin la nostra identitat gr\u00e0cies als protocols d&#8217;autentificaci\u00f3 de correu electr\u00f2nic SPF, DKIM y DMARC. Per qu\u00e8 hauries d&#8217;utilitzar els protocols SPF, DKIM i DMARC? Qualsevol que  [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":13479,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[70],"tags":[189,71,196,72,223,230,74,227,238],"class_list":["post-13484","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciberseguridad-ca","tag-amenaces-de-seguretat","tag-ciberataque-ca","tag-ciberdelinquents","tag-ciberseguridad-ca","tag-correu-electronic","tag-phishing-ca","tag-seguridad-informatica-ca","tag-spam-ca","tag-suplantacio-didentitat"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Evita plishing instal\u00b7lant protocols d&#039;autentificaci\u00f3 de correu electr\u00f2nic<\/title>\n<meta name=\"description\" content=\"Els protocols d&#039;autenticaci\u00f3 de correu electr\u00f2nic SPF, DKIM i DMARC ajuden a evitar que ens suplantin la nostra identitat. 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