{"id":6173,"date":"2026-11-03T18:00:07","date_gmt":"2026-11-03T18:00:07","guid":{"rendered":"https:\/\/zynoo.com\/blog\/ubuntu-firewall-ufw\/"},"modified":"2026-11-05T19:52:28","modified_gmt":"2026-11-05T19:52:28","slug":"ubuntu-firewall-ufw","status":"publish","type":"post","link":"https:\/\/zynoo.com\/blog\/pt\/ubuntu-firewall-ufw\/","title":{"rendered":"Firewall do Ubuntu: como configurar o UFW em um VPS"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Configurar o <strong>firewall do Ubuntu<\/strong> com o UFW (Uncomplicated Firewall) ajuda a proteger seu VPS, permitindo conex\u00f5es essenciais e bloqueando o tr\u00e1fego de entrada desnecess\u00e1rio. A configura\u00e7\u00e3o exige apenas alguns comandos, mas a ordem deles importa: libere o SSH <strong>antes<\/strong> de ativar o firewall para n\u00e3o perder o acesso remoto.<\/p>\n\n<p class=\"wp-block-paragraph\">Este tutorial mostra como instalar o UFW, configurar pol\u00edticas padr\u00e3o seguras, abrir as portas do site, ativar o firewall e gerenciar as regras depois.<\/p>\n\n<h2 id=\"h-key-takeaways\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Principais_pontos\"><\/span>Principais pontos<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<ul class=\"wp-block-list\">\n<li>O UFW oferece uma maneira simples de gerenciar o firewall do Ubuntu pela linha de comando.<\/li>\n\n\n\n<li>Libere a porta SSH que voc\u00ea realmente usa antes de ativar o UFW em um VPS remoto.<\/li>\n\n\n\n<li>Bloqueie por padr\u00e3o o tr\u00e1fego de entrada n\u00e3o solicitado e abra apenas as portas necess\u00e1rias para seus servi\u00e7os.<\/li>\n\n\n\n<li>Verifique o acesso por meio de uma segunda conex\u00e3o e revise as regras sempre que adicionar ou remover aplicativos.<\/li>\n<\/ul>\n\n<h2 id=\"h-what-is-ufw-on-ubuntu\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"O_que_e_o_UFW_no_Ubuntu\"><\/span>O que \u00e9 o UFW no Ubuntu?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">O UFW \u00e9 uma ferramenta de configura\u00e7\u00e3o de firewall que gerencia as regras do sistema de filtragem de pacotes do kernel Linux. Em vez de escrever regras de baixo n\u00edvel, voc\u00ea pode permitir ou bloquear conex\u00f5es com comandos como <code>ufw allow<\/code> e <code>ufw delete<\/code>.<\/p>\n\n<p class=\"wp-block-paragraph\">Em um VPS t\u00edpico de hospedagem de sites, voc\u00ea liberar\u00e1 o SSH para administra\u00e7\u00e3o e as portas 80 e 443 para os visitantes. As portas de bancos de dados e de aplicativos internos geralmente devem permanecer inacess\u00edveis pela internet p\u00fablica.<\/p>\n\n<h2 id=\"h-before-you-configure-the-ubuntu-firewall\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Antes_de_configurar_o_firewall_do_Ubuntu\"><\/span>Antes de configurar o firewall do Ubuntu<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Voc\u00ea precisar\u00e1 de um VPS Ubuntu com acesso <code>sudo<\/code> e uma conex\u00e3o SSH funcionando. Se voc\u00ea est\u00e1 come\u00e7ando a administrar servidores remotamente, consulte o guia da ZYNOO sobre <a href=\"https:\/\/zynoo.com\/blog\/pt\/ssh-commands\/\">comandos SSH para iniciantes<\/a>.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Mantenha sua sess\u00e3o SSH atual aberta.<\/strong> Verifique se o console web ou de recupera\u00e7\u00e3o do provedor do seu VPS funciona. Os firewalls de rede do provedor s\u00e3o separados do UFW e tamb\u00e9m podem precisar de regras adequadas.<\/p>\n\n<p class=\"wp-block-paragraph\">Estas instru\u00e7\u00f5es pressup\u00f5em uma configura\u00e7\u00e3o nova ou inativa do UFW. Se o UFW j\u00e1 estiver ativo, examine suas regras e os requisitos dos servi\u00e7os antes de alterar a pol\u00edtica padr\u00e3o.<\/p>\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-1024x576.webp\" alt=\"Configura\u00e7\u00e3o do firewall de um VPS Ubuntu com o UFW\" class=\"wp-image-6152\" srcset=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-1024x576.webp 1024w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-300x169.webp 300w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-768x432.webp 768w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-1536x864.webp 1536w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h2 id=\"h-step-1-check-and-install-ufw\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etapa_1_Verifique_e_instale_o_UFW\"><\/span>Etapa 1: Verifique e instale o UFW<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Verifique se o UFW est\u00e1 dispon\u00edvel:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw status<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\"><code>Status: inactive<\/code> significa que ele est\u00e1 instalado, mas n\u00e3o est\u00e1 aplicando regras. Se o comando n\u00e3o for encontrado, instale o UFW:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo apt update\nsudo apt install ufw<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Ainda n\u00e3o ative o firewall.<\/p>\n\n<h2 id=\"h-step-2-allow-ssh-before-enabling-ufw\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etapa_2_Libere_o_SSH_antes_de_ativar_o_UFW\"><\/span>Etapa 2: Libere o SSH antes de ativar o UFW<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Descubra em qual porta TCP o SSH est\u00e1 aceitando conex\u00f5es:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ss -ltnp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Compare a sa\u00edda com a porta usada pelo seu cliente SSH. A porta <strong>22<\/strong> \u00e9 comum, mas as configura\u00e7\u00f5es de VPS podem usar outra porta.<\/p>\n\n<p class=\"wp-block-paragraph\">Se o SSH usar a porta 22, execute:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 22\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Se o SSH usar uma porta personalizada, como a 2222, libere essa porta <em>em vez da 22<\/em>:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 2222\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">A porta 2222 \u00e9 apenas um exemplo, n\u00e3o uma porta adicional que todos devem abrir. Revise as regras que ainda ser\u00e3o aplicadas:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw show added<\/code><\/pre>\n\n<h2 id=\"h-step-3-set-default-rules-and-check-ipv6\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etapa_3_Defina_as_regras_padrao_e_verifique_o_IPv6\"><\/span>Etapa 3: Defina as regras padr\u00e3o e verifique o IPv6<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Use uma pol\u00edtica padr\u00e3o que bloqueie conex\u00f5es de entrada e permita que o VPS inicie conex\u00f5es de sa\u00edda:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw default deny incoming\nsudo ufw default allow outgoing<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Se o seu VPS tiver conectividade IPv6 p\u00fablica, confirme se o UFW oferece suporte a ela:<\/p>\n\n<pre class=\"wp-block-code\"><code>grep '^IPV6=' \/etc\/default\/ufw<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">A configura\u00e7\u00e3o esperada \u00e9 <code>IPV6=yes<\/code>. Se o IPv6 estiver em uso, mas essa op\u00e7\u00e3o estiver definida como <code>no<\/code>, edite <code>\/etc\/default\/ufw<\/code> para ativar o suporte a IPv6 <strong>antes<\/strong> de ativar o firewall.<\/p>\n\n<h2 id=\"h-step-4-open-the-ports-your-website-needs\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etapa_4_Abra_as_portas_necessarias_para_seu_site\"><\/span>Etapa 4: Abra as portas necess\u00e1rias para seu site<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Se o VPS hospedar um site p\u00fablico, libere <a href=\"https:\/\/en.wikipedia.org\/wiki\/HTTP\">HTTP<\/a> e HTTPS antes de ativar o UFW:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 80\/tcp\nsudo ufw allow 443\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">As portas comuns em um VPS Ubuntu s\u00e3o:<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Servi\u00e7o<\/th><th>Porta<\/th><th>Protocolo<\/th><\/tr><tr><td>SSH<\/td><td>22 (ou sua porta personalizada)<\/td><td>TCP<\/td><\/tr><tr><td>HTTP<\/td><td>80<\/td><td>TCP<\/td><\/tr><tr><td>HTTPS<\/td><td>443<\/td><td>TCP<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">Para um aplicativo p\u00fablico em outra porta TCP, a sintaxe do UFW para liberar a porta \u00e9:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 8080\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Execute esse exemplo apenas se o seu servi\u00e7o precisar de acesso externo pela porta 8080. Para um servi\u00e7o UDP, especifique <code>\/udp<\/code> em vez disso, como em <code>sudo ufw allow 51820\/udp<\/code> para um endpoint WireGuard configurado nessa porta.<\/p>\n\n<p class=\"wp-block-paragraph\">Voc\u00ea tamb\u00e9m pode verificar os perfis de aplicativos dispon\u00edveis:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw app list<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Se <code>Nginx Full<\/code> aparecer na lista, examine suas portas com <code>sudo ufw app info 'Nginx Full'<\/code>. O comando <code>sudo ufw allow 'Nginx Full'<\/code> pode substituir as duas regras de portas do site mostradas acima; n\u00e3o \u00e9 necess\u00e1rio usar as duas abordagens. Aplicativos atr\u00e1s de um <a href=\"https:\/\/zynoo.com\/blog\/pt\/nginx-reverse-proxy-ubuntu\/\">proxy reverso Nginx local<\/a> geralmente n\u00e3o devem expor publicamente a porta do servi\u00e7o de backend.<\/p>\n\n<h2 id=\"h-step-5-enable-ufw-and-verify-the-firewall\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etapa_5_Ative_o_UFW_e_verifique_o_firewall\"><\/span>Etapa 5: Ative o UFW e verifique o firewall<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Depois de liberar o SSH e todas as portas necess\u00e1rias para seus servi\u00e7os, ative o UFW:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw enable<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Um aviso poder\u00e1 informar que a opera\u00e7\u00e3o pode afetar o SSH. Prossiga somente depois de confirmar a regra de SSH e o acesso ao console de recupera\u00e7\u00e3o. Confira as regras em vigor:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw status verbose<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Voc\u00ea dever\u00e1 ver <code>Status: active<\/code>, as pol\u00edticas padr\u00e3o e as portas liberadas. O UFW tamb\u00e9m passa a ser iniciado automaticamente na inicializa\u00e7\u00e3o do sistema.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Antes de fechar sua sess\u00e3o SSH original, conecte-se novamente por um segundo terminal.<\/strong> No seu computador, use <code>ssh -p 22 username@server-ip<\/code>, substituindo o nome de usu\u00e1rio, o endere\u00e7o e a porta conforme necess\u00e1rio. Teste seu site de uma rede externa se voc\u00ea abriu as portas 80 e 443. Uma regra <code>ALLOW<\/code>, por si s\u00f3, n\u00e3o comprova que o servi\u00e7o est\u00e1 acess\u00edvel.<\/p>\n\n<h2 id=\"h-step-6-manage-restrict-and-delete-ufw-rules\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etapa_6_Gerencie_restrinja_e_exclua_regras_do_UFW\"><\/span>Etapa 6: Gerencie, restrinja e exclua regras do UFW<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Para listar as regras do firewall com seus n\u00fameros:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw status numbered<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Para excluir uma regra de libera\u00e7\u00e3o desatualizada, por exemplo, para a porta TCP 8080:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw delete allow 8080\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Voc\u00ea tamb\u00e9m pode excluir uma regra pelo n\u00famero (<code>sudo ufw delete 3<\/code>), mas confira a lista atual primeiro: a numera\u00e7\u00e3o pode mudar, e a exclus\u00e3o pelo n\u00famero pode remover apenas uma das regras correspondentes de um par IPv4\/IPv6.<\/p>\n\n<h3 id=\"h-optional-restrict-ssh-to-your-ip\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Opcional_restrinja_o_SSH_ao_seu_IP\"><\/span>Opcional: restrinja o SSH ao seu IP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">Se o IP usado para administra\u00e7\u00e3o for est\u00e1vel, voc\u00ea pode restringir o SSH a esse endere\u00e7o. Por exemplo:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow from 203.0.113.10 to any port 22 proto tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Substitua o IP do exemplo pelo seu IP p\u00fablico real. Teste um novo acesso a partir desse endere\u00e7o e depois remova a regra antiga que libera o acesso geral com <code>sudo ufw delete allow 22\/tcp<\/code>. <strong>Se a regra de acesso geral continuar ativa, qualquer pessoa ainda poder\u00e1 se conectar.<\/strong> Mantenha a sess\u00e3o original aberta e o console de recupera\u00e7\u00e3o dispon\u00edvel durante todo o processo.<\/p>\n\n<h3 id=\"h-optional-rate-limit-ssh-attempts\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Opcional_limite_a_frequencia_das_tentativas_de_conexao_SSH\"><\/span>Opcional: limite a frequ\u00eancia das tentativas de conex\u00e3o SSH<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">Como alternativa, se voc\u00ea precisar acessar o SSH a partir de IPs que mudam, substitua a regra de acesso geral por um limite na frequ\u00eancia das conex\u00f5es:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw limit 22\/tcp\nsudo ufw delete allow 22\/tcp\nsudo ufw status numbered<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Fa\u00e7a isso somente depois de confirmar que a conex\u00e3o SSH e o acesso ao console de recupera\u00e7\u00e3o est\u00e3o funcionando; se a sua porta SSH n\u00e3o for a 22, use a porta correta. Depois, teste um novo acesso. Essa \u00e9 uma <strong>alternativa<\/strong> \u00e0 restri\u00e7\u00e3o de acesso por IP, n\u00e3o uma medida para combinar com ela. O limite na frequ\u00eancia das conex\u00f5es n\u00e3o substitui a autentica\u00e7\u00e3o por chave SSH.<\/p>\n\n<h2 id=\"h-step-7-check-logs-and-troubleshoot-access\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etapa_7_Verifique_os_logs_e_resolva_problemas_de_acesso\"><\/span>Etapa 7: Verifique os logs e resolva problemas de acesso<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Ative o registro b\u00e1sico em log quando precisar investigar tr\u00e1fego bloqueado:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw logging on\nsudo ufw status verbose<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Os logs do UFW podem estar dispon\u00edveis no journal do sistema ou em <code>\/var\/log\/ufw.log<\/code>, dependendo da sua configura\u00e7\u00e3o de logs.<\/p>\n\n<p class=\"wp-block-paragraph\">Se o SSH ficar inacess\u00edvel, use o <strong>console de recupera\u00e7\u00e3o<\/strong> do seu provedor para examinar as regras ativas. Como medida tempor\u00e1ria de emerg\u00eancia, <code>sudo ufw disable<\/code> interrompe a aplica\u00e7\u00e3o das regras; corrija a regra de SSH e ative o UFW novamente.<\/p>\n\n<p class=\"wp-block-paragraph\">Se o seu site n\u00e3o carregar, verifique os servi\u00e7os que est\u00e3o aceitando conex\u00f5es com <code>sudo ss -ltnp<\/code>, as regras do UFW e qualquer firewall do provedor. Abrir uma porta n\u00e3o inicia o servi\u00e7o associado a ela.<\/p>\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Perguntas_frequentes\"><\/span>Perguntas frequentes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1793901025290\"><strong class=\"schema-faq-question\">O firewall do Ubuntu inicia automaticamente ap\u00f3s uma reinicializa\u00e7\u00e3o?<\/strong> <p class=\"schema-faq-answer\">Sim. Depois que voc\u00ea executa sudo ufw enable, o UFW permanece ativado nas pr\u00f3ximas inicializa\u00e7\u00f5es. Verifique a configura\u00e7\u00e3o com sudo ufw status verbose.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793901239112\"><strong class=\"schema-faq-question\">Preciso reiniciar o Ubuntu depois de alterar as regras do UFW?<\/strong> <p class=\"schema-faq-answer\">N\u00e3o. As regras adicionadas ou removidas pelo UFW entram em vigor sem reiniciar o VPS. Voc\u00ea pode consultar a configura\u00e7\u00e3o atual imediatamente.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793901250570\"><strong class=\"schema-faq-question\">O firewall UFW protege os cont\u00eaineres Docker?<\/strong> <p class=\"schema-faq-answer\">N\u00e3o necessariamente. As portas publicadas pelo Docker podem contornar as regras comuns de entrada do UFW porque o Docker configura suas pr\u00f3prias regras de rede. Consulte a documenta\u00e7\u00e3o do Docker sobre firewalls antes de confiar no UFW para restringir o acesso aos cont\u00eaineres.<\/p> <\/div> <\/div>\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusao\"><\/span>Conclus\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Uma configura\u00e7\u00e3o segura do <strong>firewall do Ubuntu<\/strong> com o UFW come\u00e7a pela libera\u00e7\u00e3o do SSH, pela aplica\u00e7\u00e3o de uma pol\u00edtica padr\u00e3o que bloqueia conex\u00f5es de entrada e pela abertura apenas das portas necess\u00e1rias para seus aplicativos. Depois de ativar o UFW, verifique o acesso por uma conex\u00e3o separada e remova as regras obsoletas conforme as necessidades do seu VPS mudarem.<\/p>\n\n<p class=\"wp-block-paragraph\">O UFW controla o acesso \u00e0 rede, n\u00e3o o uso abusivo dos aplicativos. Para sites p\u00fablicos com Nginx, <a href=\"https:\/\/zynoo.com\/blog\/pt\/nginx-rate-limiting\/\">limitar a frequ\u00eancia das requisi\u00e7\u00f5es<\/a> \u00e9 uma medida de prote\u00e7\u00e3o adicional \u00fatil.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Configurar o firewall do Ubuntu com o UFW (Uncomplicated Firewall) ajuda a proteger seu VPS, permitindo conex\u00f5es essenciais e bloqueando o tr\u00e1fego de entrada desnecess\u00e1rio. A configura\u00e7\u00e3o exige apenas alguns comandos, mas a ordem deles importa: libere o SSH antes de ativar o firewall para n\u00e3o perder o acesso remoto. Este tutorial mostra como instalar [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":6174,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[505],"tags":[],"class_list":["post-6173","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutoriais-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Firewall do Ubuntu: como configurar o UFW em um VPS<\/title>\n<meta name=\"description\" content=\"Aprenda a configurar o firewall do Ubuntu com o UFW. 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Depois que voc\u00ea executa sudo ufw enable, o UFW permanece ativado nas pr\u00f3ximas inicializa\u00e7\u00f5es. Verifique a configura\u00e7\u00e3o com sudo ufw status verbose.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/zynoo.com\/blog\/pt\/ubuntu-firewall-ufw\/#faq-question-1793901239112","position":2,"url":"https:\/\/zynoo.com\/blog\/pt\/ubuntu-firewall-ufw\/#faq-question-1793901239112","name":"Preciso reiniciar o Ubuntu depois de alterar as regras do UFW?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"N\u00e3o. As regras adicionadas ou removidas pelo UFW entram em vigor sem reiniciar o VPS. Voc\u00ea pode consultar a configura\u00e7\u00e3o atual imediatamente.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/zynoo.com\/blog\/pt\/ubuntu-firewall-ufw\/#faq-question-1793901250570","position":3,"url":"https:\/\/zynoo.com\/blog\/pt\/ubuntu-firewall-ufw\/#faq-question-1793901250570","name":"O firewall UFW protege os cont\u00eaineres Docker?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"N\u00e3o necessariamente. As portas publicadas pelo Docker podem contornar as regras comuns de entrada do UFW porque o Docker configura suas pr\u00f3prias regras de rede. Consulte a documenta\u00e7\u00e3o do Docker sobre firewalls antes de confiar no UFW para restringir o acesso aos cont\u00eaineres.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"}]}},"_links":{"self":[{"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/posts\/6173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/comments?post=6173"}],"version-history":[{"count":4,"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/posts\/6173\/revisions"}],"predecessor-version":[{"id":6517,"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/posts\/6173\/revisions\/6517"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/media\/6174"}],"wp:attachment":[{"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/media?parent=6173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/categories?post=6173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zynoo.com\/blog\/pt\/wp-json\/wp\/v2\/tags?post=6173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}