{"id":97633,"date":"2020-10-20T02:42:47","date_gmt":"2020-10-20T00:42:47","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/private-psk-pre-shared-key-osobennosti-i-vozmozhnosti-platformy-extremecloud-iq"},"modified":"2020-10-20T02:42:47","modified_gmt":"2020-10-20T00:42:47","slug":"private-psk-pre-shared-key-osobennosti-i-vozmozhnosti-platformy-extremecloud-iq","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/administrirovanie\/private-psk-pre-shared-key-osobennosti-i-vozmozhnosti-platformy-extremecloud-iq","title":{"rendered":"Private PSK (Chave Pr\u00e9-Compartilhada) \u2013 caracter\u00edsticas e possibilidades da plataforma ExtremeCloud IQ","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>O WPA3 j\u00e1 foi adotado e, desde julho de 2020, \u00e9 obrigat\u00f3rio para dispositivos que passam pela certifica\u00e7\u00e3o da WiFi Alliance; o WPA2 n\u00e3o foi cancelado e n\u00e3o se pretende isso. Tanto o WPA2 quanto o WPA3 suportam opera\u00e7\u00e3o nos modos PSK e Enterprise, mas propomos considerar neste artigo a tecnologia Private PSK, bem como as vantagens que podem ser obtidas com sua ajuda.<\/p>\n<p><img decoding=\"async\" alt=\"Private PSK (Chave Pr\u00e9-Compartilhada) \u2013 caracter\u00edsticas e possibilidades da plataforma ExtremeCloud IQ\" src=\"\/wp-content\/uploads\/2020\/10\/098108c3884a2214168bd2d320d8e9f9.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nOs problemas do WPA2-Personal s\u00e3o bem conhecidos e, na sua maioria, j\u00e1 foram corrigidos (Priority Management Frames, corre\u00e7\u00f5es para a vulnerabilidade KRACK, etc.). O principal problema remanescente do WPA2 ao usar PSK \u00e9 que senhas fracas podem ser facilmente quebradas por ataque de dicion\u00e1rio. Em caso de comprometimento e troca de senha, ser\u00e1 necess\u00e1rio reconfigurar todos os dispositivos conectados (e pontos de acesso), o que pode ser um processo bastante trabalhoso (para resolver o problema de \"senha fraca\", a WiFi Alliance recomenda usar senhas com pelo menos 20 caracteres).<\/p>\n<p>Outra quest\u00e3o que \u00e0s vezes n\u00e3o pode ser resolvida com o WPA2-Personal \u00e9 a atribui\u00e7\u00e3o de diferentes perfis (vlan, QoS, firewall\u2026) a grupos de dispositivos conectados ao mesmo SSID.<\/p>\n<p>Com o WPA2-Enterprise, \u00e9 poss\u00edvel resolver todos os problemas descritos acima, mas o pre\u00e7o por isso ser\u00e1:<\/p>\n<ul>\n<li>A necessidade de ter ou implantar uma PKI (Infraestrutura de Chave P\u00fablica) e certificados de seguran\u00e7a;<\/li>\n<li>Podem surgir dificuldades na instala\u00e7\u00e3o;<\/li>\n<li>Podem surgir dificuldades na solu\u00e7\u00e3o de problemas;<\/li>\n<li>N\u00e3o \u00e9 uma solu\u00e7\u00e3o ideal para dispositivos IoT ou acesso de convidados.<\/li>\n<\/ul>\n<p>\nUma solu\u00e7\u00e3o mais radical para os problemas do WPA2-Personal \u00e9 a transi\u00e7\u00e3o para o WPA3, cuja principal melhoria \u00e9 o uso do SAE (Autentica\u00e7\u00e3o Simult\u00e2nea de Iguais) e PSK est\u00e1ticos. O WPA3-Personal resolve o problema do \"ataque de dicion\u00e1rio\", mas n\u00e3o garante a identifica\u00e7\u00e3o \u00fanica durante a autentica\u00e7\u00e3o e, consequentemente, a possibilidade de atribui\u00e7\u00e3o de perfis (pois ainda \u00e9 utilizada uma senha est\u00e1tica comum).<\/p>\n<p><img decoding=\"async\" alt=\"Private PSK (Chave Pr\u00e9-Compartilhada) \u2013 caracter\u00edsticas e possibilidades da plataforma ExtremeCloud IQ\" src=\"\/wp-content\/uploads\/2020\/10\/6ea0cbf3ec9e5f2decef500cf9a04cd1.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nAl\u00e9m disso, \u00e9 preciso considerar que mais de 95% dos clientes existentes atualmente n\u00e3o suportam o WPA3 e o SAE, enquanto o WPA2 continua a funcionar com sucesso em bilh\u00f5es de dispositivos j\u00e1 lan\u00e7ados.<\/p>\n<p>Para resolver os problemas mencionados acima, existentes ou potencialmente poss\u00edveis, a Extreme Networks desenvolveu a tecnologia Private Pre-Shared Key (PPSK). O PPSK \u00e9 compat\u00edvel com qualquer cliente Wi-Fi que suporte WPA2-PSK, e oferece um n\u00edvel de seguran\u00e7a compar\u00e1vel ao que se alcan\u00e7a com WPA2-Enterprise, sem a necessidade de construir uma infraestrutura 802.1X\/EAP. O Private PSK \u00e9 essencialmente WPA2-PSK, mas cada usu\u00e1rio (ou grupo de usu\u00e1rios) pode ter sua pr\u00f3pria senha dinamicamente gerada. A gest\u00e3o do PPSK n\u00e3o difere da gest\u00e3o do PSK, pois todo o processo \u00e9 automatizado. O banco de dados de chaves pode ser armazenado localmente nos pontos de acesso ou na nuvem.<\/p>\n<p><img decoding=\"async\" alt=\"Private PSK (Chave Pr\u00e9-Compartilhada) \u2013 caracter\u00edsticas e possibilidades da plataforma ExtremeCloud IQ\" src=\"\/wp-content\/uploads\/2020\/10\/878f418cf07e2ffd94d22cd5b42388fd.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nAs senhas podem ser geradas automaticamente, com a flexibilidade de definir seu comprimento\/resili\u00eancia, per\u00edodo ou prazo de validade, e o m\u00e9todo de entrega ao usu\u00e1rio (por e-mail ou SMS):<\/p>\n<p><img decoding=\"async\" alt=\"Private PSK (Chave Pr\u00e9-Compartilhada) \u2013 caracter\u00edsticas e possibilidades da plataforma ExtremeCloud IQ\" src=\"\/wp-content\/uploads\/2020\/10\/0ba90a70c476ab853bf564816c16f3cb.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n <img decoding=\"async\" alt=\"Private PSK (Chave Pr\u00e9-Compartilhada) \u2013 caracter\u00edsticas e possibilidades da plataforma ExtremeCloud IQ\" src=\"\/wp-content\/uploads\/2020\/10\/c826ae0d8971d2e997ab8fd9d7c3f160.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nTamb\u00e9m \u00e9 poss\u00edvel configurar um n\u00famero m\u00e1ximo de clientes que poder\u00e3o conectar-se com um \u00fanico PPSK ou at\u00e9 mesmo configurar o 'MAC-binding' para os dispositivos que se conectam. A pedido do administrador da rede, qualquer chave pode ser facilmente revogada, e o acesso \u00e0 rede ser\u00e1 negado sem a necessidade de reconfigurar todos os outros dispositivos. Se no momento da revoga\u00e7\u00e3o da chave o cliente estiver conectado, o ponto de acesso automaticamente desconectar\u00e1 o cliente da rede.<\/p>\n<p>Entre as principais vantagens do PPSK, destacamos:<\/p>\n<ul>\n<li>facilidade de uso com alto n\u00edvel de seguran\u00e7a;<\/li>\n<li>a mitiga\u00e7\u00e3o de ataques de dicion\u00e1rio \u00e9 tratada com senhas longas e fortes, que o ExtremeCloudIQ consegue gerar e distribuir automaticamente;<\/li>\n<li>a capacidade de atribuir diferentes perfis de seguran\u00e7a a diferentes dispositivos conectados a um mesmo SSID;<\/li>\n<li>ideal para acesso seguro de convidados;<\/li>\n<li>perfeito para acesso seguro quando os dispositivos n\u00e3o suportam 802.1X \/ EAP (scanner manuais ou dispositivos IoT\/VoWiFi);<\/li>\n<li>uso e aprimoramento bem-sucedidos ao longo de mais de 10 anos.<\/li>\n<\/ul>\n<p>\nQualquer d\u00favida ou quest\u00e3o remanescente pode ser feita aos funcion\u00e1rios do nosso escrit\u00f3rio \u2013 <noindex><a rel=\"nofollow\" href=\"mailto:\/\/cis@extremenetworks.com\">cis@extremenetworks.com<\/a><\/noindex>.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/extremenetworks\/blog\/523890\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>WPA3 \u0443\u0436\u0435 \u043f\u0440\u0438\u043d\u044f\u0442, \u0438 \u0441 \u0438\u044e\u043b\u044f 2020 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u0435\u043d \u0434\u043b\u044f \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u0440\u043e\u0445\u043e\u0434\u044f\u0442 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e \u0432 WiFi-Alliance, WPA2 \u043d\u0438\u043a\u0442\u043e \u043d\u0435 \u043e\u0442\u043c\u0435\u043d\u044f\u043b \u0438 \u043d\u0435 \u0441\u043e\u0431\u0438\u0440\u0430\u0435\u0442\u0441\u044f. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u0438 WPA2, \u0438 WPA3 \u043f\u0440\u0435\u0434\u0443\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u044e\u0442 \u0440\u0430\u0431\u043e\u0442\u0443 \u0432 \u0440\u0435\u0436\u0438\u043c\u0430\u0445 PSK \u0438 Enterprise, \u043d\u043e \u043c\u044b \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u043c \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u0432 \u043d\u0430\u0448\u0435\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044e Private PSK, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u0435\u0438\u043c\u0443\u0449\u0435\u0441\u0442\u0432\u0430 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043c\u043e\u0436\u043d\u043e \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0441 \u0435\u0451 \u043f\u043e\u043c\u043e\u0449\u044c\u044e. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":97634,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-97633","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"WPA3 \u0443\u0436\u0435 \u043f\u0440\u0438\u043d\u044f\u0442, \u0438 \u0441 \u0438\u044e\u043b\u044f 2020 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u0435\u043d \u0434\u043b\u044f \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u0440\u043e\u0445\u043e\u0434\u044f\u0442 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e \u0432 WiFi-Alliance, WPA2 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