{"id":29580,"date":"2026-08-17T22:27:28","date_gmt":"2026-08-17T22:27:28","guid":{"rendered":"https:\/\/www.redes-wireless.pt\/servicos-it\/seguranca-wifi-empresa-rede-convidados-passwords\/"},"modified":"2026-08-17T22:27:28","modified_gmt":"2026-08-17T22:27:28","slug":"securite-wi-fi-entreprise-reseau-invites-mots-de-passe","status":"publish","type":"post","link":"https:\/\/www.redes-wireless.pt\/fr\/redes-wireless-instalacao\/seguranca-wifi-empresa-rede-convidados-passwords\/","title":{"rendered":"S\u00e9curit\u00e9 du Wi-Fi d'entreprise : Invit\u00e9s, mots de passe et ce qu'il ne faut jamais partager"},"content":{"rendered":"<p><!-- dr-visual --><\/p>\n<p class=\"dr-meta\">4 min de lecture DataRoad<\/p>\n<div class=\"dr-resumo\">\n<p class=\"dr-t\">En r\u00e9sum\u00e9<\/p>\n<ul>\n<li>Le Wi-Fi est <strong>une porte de l'entreprise<\/strong> \u2014 et dans de nombreuses entreprises, elle est ouverte \u00e0 ceux qui y sont d\u00e9j\u00e0 pass\u00e9s.<\/li>\n<li>Un r\u00e9seau d'invit\u00e9s n'est pas un luxe : c'est <strong>la serrure de base<\/strong> qui s\u00e9pare les visites des donn\u00e9es.<\/li>\n<li>Un mot de passe partag\u00e9 pendant des ann\u00e9es \u00e9quivaut \u00e0 <strong>ne pas avoir de mot de passe<\/strong>.<\/li>\n<li>Une bonne s\u00e9curit\u00e9 sans fil est invisible pour l'\u00e9quipe \u2014 <strong>et infranchissable pour le reste<\/strong>.<\/li>\n<\/ul>\n<\/div>\n<div class=\"dr-toc\">\n<p class=\"dr-t\">Dans cet article<\/p>\n<ol>\n<li><a href=\"#s-porta\">Le Wi-Fi est une porte \u2014 qui a la cl\u00e9 ?<\/a><\/li>\n<li><a href=\"#s-convidados\">Le r\u00e9seau d'invit\u00e9s, expliqu\u00e9 en 60 secondes<\/a><\/li>\n<li><a href=\"#s-praticas\">Les cinq pratiques qui s\u00e9parent les entreprises s\u00fbres<\/a><\/li>\n<li><a href=\"#s-gerida\">Une s\u00e9curit\u00e9 qui s'entretient toute seule (parce que quelqu'un la g\u00e8re)<\/a><\/li>\n<\/ol>\n<\/div>\n<h2 id=\"s-porta\">Le Wi-Fi est une porte \u2014 qui a la cl\u00e9 ?<\/h2>\n<p>Faites cet exercice rapide : combien de personnes en dehors de votre entreprise connaissent le mot de passe du Wi-Fi ? D'anciens collaborateurs, des prestataires qui ont fait une pr\u00e9sentation, le technicien venu r\u00e9parer la climatisation, des membres de la famille de coll\u00e8gues. Si le mot de passe est le m\u00eame depuis plus d'un an, la r\u00e9ponse honn\u00eate est \u201c je n'en ai aucune id\u00e9e \u201d. Et quiconque se connecte au mauvais Wi-Fi n'acc\u00e8de pas seulement \u00e0 Internet \u2014 il entre sur le r\u00e9seau o\u00f9 r\u00e9sident les dossiers partag\u00e9s, la facturation et les imprimantes de l'entreprise.<\/p>\n<h2 id=\"s-convidados\">Le r\u00e9seau d'invit\u00e9s, expliqu\u00e9 en 60 secondes<\/h2>\n<p>Un r\u00e9seau d'invit\u00e9s est un Wi-Fi parall\u00e8le qui donne acc\u00e8s \u00e0 Internet aux visiteurs \u2014 et absolument rien d'autre. Ceux qui s'y trouvent ne voient pas les ordinateurs de l'entreprise, ne voient pas les serveurs, ne voient pas les imprimantes. C'est comme recevoir des invit\u00e9s dans le salon au lieu de leur donner la cl\u00e9 de toute la maison. Cela co\u00fbte peu \u00e0 mettre en place sur un r\u00e9seau professionnel et \u00e9limine d'un coup la plus grande source de risque sans fil : <strong>le mot de passe de l'entreprise circule aupr\u00e8s d'\u00e9trangers<\/strong>.<\/p>\n<div class=\"dr-destaque\"><strong>Les visiteurs se connectent \u00e0 Internet. Seule l'\u00e9quipe se connecte \u00e0 l'entreprise.<\/strong><\/div>\n<h2 id=\"s-praticas\">Les cinq pratiques qui s\u00e9parent les entreprises s\u00fbres<\/h2>\n<ul>\n<li><strong>R\u00e9seaux s\u00e9par\u00e9s<\/strong> \u2014 \u00e9quipe, invit\u00e9s et \u00e9quipements (cam\u00e9ras, t\u00e9l\u00e9viseurs, imprimantes), chacun dans son espace.<\/li>\n<li><strong>Chiffrement actuel<\/strong> \u2014 \u00e9quipements modernes dot\u00e9s des protocoles de s\u00e9curit\u00e9 les plus r\u00e9cents, et non le routeur de 2015.<\/li>\n<li><strong>Mots de passe g\u00e9r\u00e9s<\/strong> \u2014 renouvel\u00e9es avec des r\u00e8gles, et supprim\u00e9es lorsque quelqu'un quitte l'entreprise.<\/li>\n<li><strong>Visibilit\u00e9<\/strong> savoir, \u00e0 tout moment, quels appareils sont connect\u00e9s et s'\u00e9tonner de ceux qui ne devraient pas l'\u00eatre.<\/li>\n<li><strong>Mises \u00e0 jour<\/strong> \u2014 les \u00e9quipements de r\u00e9seau ont \u00e9galement des failles de s\u00e9curit\u00e9 ; quelqu'un doit les corriger.<\/li>\n<\/ul>\n<h2 id=\"s-gerida\">Une s\u00e9curit\u00e9 qui s'entretient toute seule (parce que quelqu'un la g\u00e8re)<\/h2>\n<p>Aucune de ces pratiques n'est difficile. Le plus difficile est de les maintenir toutes, chaque mois, lorsqu'il y a une entreprise \u00e0 g\u00e9rer. C'est pourquoi les entreprises confient leur r\u00e9seau \u00e0 DataRoad : <a href=\"https:\/\/www.redes-wireless.pt\/fr\/installation-de-reseaux-sans-fil\/\">nous avons install\u00e9 le r\u00e9seau sans fil<\/a> avec la s\u00e9curit\u00e9 con\u00e7ue d\u00e8s l'origine, nous l'int\u00e9grons \u00e0 la <a href=\"https:\/\/www.redes-wireless.pt\/fr\/pare-feus-securite-informatique\/\">protection p\u00e9rim\u00e9trique<\/a>, et nous g\u00e9rons tout en continu \u2014 mises \u00e0 jour, acc\u00e8s et surveillance. Pour l'\u00e9quipe, rien ne change : le Wi-Fi fonctionne tout simplement. Pour ceux qui essaient d'entrer sans invitation, tout change. <a href=\"https:\/\/www.redes-wireless.pt\/fr\/entreprise-de-services-informatiques-2\/?assunto=Seguran\u00e7a WiFi\">Demandez une \u00e9valuation de votre r\u00e9seau<\/a> \u2014 nous vous disons, sans drames, o\u00f9 elle est expos\u00e9e.<\/p>\n<div class=\"dr-contacto\">\n<p class=\"dr-t\">Une discussion avant de prendre une d\u00e9cision<\/p>\n<p class=\"dr-d\">Que vous cherchiez \u00e0 r\u00e9soudre un probl\u00e8me concret, que vous envisagiez un changement ou que vous souhaitiez simplement obtenir un deuxi\u00e8me avis, nous proc\u00e9dons toujours de la m\u00eame mani\u00e8re : nous commen\u00e7ons par comprendre votre situation avant de vous proposer quoi que ce soit. Sans engagement, sans jargon et sans catalogues.<\/p>\n<div class=\"dr-vias\"><a href=\"tel:+351211459950\"><span class=\"dr-l\">T\u00e9l\u00e9phone<\/span><span class=\"dr-v\">351 211 459 950<\/span><span class=\"dr-n\">appel vers le r\u00e9seau fixe national<\/span><\/a><a href=\"mailto:sales@dataroad.pt\"><span class=\"dr-l\">Courriel<\/span><span class=\"dr-v\">sales@dataroad.pt<\/span><span class=\"dr-n\">D\u00e9crivez-nous votre situation<\/span><\/a><\/div>\n<p class=\"dr-acao\"><a href=\"https:\/\/www.redes-wireless.pt\/fr\/entreprise-de-services-informatiques-2\/\">Planifier un audit de votre infrastructure<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Le mot de passe du Wi-Fi de votre entreprise circule-t-il ? R\u00e9seau d'invit\u00e9s, s\u00e9paration et bonnes pratiques de s\u00e9curit\u00e9 sans fil expliqu\u00e9es aux d\u00e9cideurs. DataRoad.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","footnotes":""},"categories":[75],"tags":[],"class_list":["post-29580","post","type-post","status-publish","format-standard","hentry","category-redes-wireless-instalacao"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"S\u00e9curit\u00e9 du Wi-Fi en entreprise : r\u00e9seau invit\u00e9s, mots de passe et ce qu&#039;il ne faut jamais partager. 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