{"id":2063,"date":"2025-12-15T19:30:30","date_gmt":"2025-12-15T22:30:30","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=2063"},"modified":"2026-01-13T17:16:07","modified_gmt":"2026-01-13T20:16:07","slug":"configuracao-do-firewall-ovh","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/configuracao-do-firewall-ovh\/","title":{"rendered":"Configura\u00e7\u00e3o do firewall OVH"},"content":{"rendered":"<div id=\"helps-11153890\" class=\"helps-before-content-2 helps-entity-placement\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3661896953164277\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- 2anuncios display quadrado -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-3661896953164277\"\r\n     data-ad-slot=\"5051229894\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n<p>Configura\u00e7\u00e3o do firewall OVH \u00e9 uma excelente camada de seguran\u00e7a <strong>adicional<\/strong> ao firewall interno do seu servidor (como <code>iptables<\/code>, <code>ufw<\/code> ou <code>firewalld<\/code>). Ele bloqueia tr\u00e1fego indesejado antes mesmo de chegar \u00e0 interface de rede do seu servidor, economizando recursos de CPU e largura de banda.<\/p>\n\n\n\n<p>Aqui est\u00e1 um guia passo a passo para <a href=\"https:\/\/helpsysadmin.com.br\/blog\/configurar-login-automatico-phpmyadmin\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Como Configurar Login Autom\u00e1tico no phpMyAdmin via DirectAdmin\">configurar<\/a> o Firewall de Rede da OVH, focado em evitar erros comuns (como bloquear o pr\u00f3prio acesso).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-entendendo-a-logica-antes-de-comecar\">1. Entendendo a L\u00f3gica (Antes de Come\u00e7ar)<\/h3>\n\n\n\n<p>O Firewall da OVH funciona com regras numeradas de <strong>Prioridade (0 a 19)<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Regra 0:<\/strong> \u00c9 a primeira a ser lida.<\/li>\n\n\n\n<li><strong>Regra 19:<\/strong> \u00c9 a \u00faltima a ser lida.<\/li>\n\n\n\n<li>Assim que um pacote de dados corresponde a uma regra, a a\u00e7\u00e3o (Autorizar ou Recusar) \u00e9 tomada e <strong>a leitura para<\/strong>.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Estrat\u00e9gia Recomendada (Whitelist):<\/strong> A maneira mais segura \u00e9 autorizar explicitamente o que voc\u00ea precisa (SSH, HTTP, HTTPS) nas prioridades baixas (0, 1, 2&#8230;) e <strong>recusar todo o resto<\/strong> na prioridade mais alta (19).<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-acessando-o-painel\">2. Acessando o Painel<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Fa\u00e7a login no <strong>OVH Manager<\/strong>.<\/li>\n\n\n\n<li>No menu superior, v\u00e1 para <strong>Bare Metal Cloud<\/strong>.<\/li>\n\n\n\n<li>No menu \u00e0 esquerda, clique em <strong>Network<\/strong> e depois em <strong>IP<\/strong>.<\/li>\n\n\n\n<li>Localize o IP do seu servidor na lista.<\/li>\n\n\n\n<li>Clique nos <code>...<\/code> (tr\u00eas pontos) ao lado do IP e selecione <strong>Criar Firewall<\/strong> (se ainda n\u00e3o existir) ou <strong>Configurar o Firewall<\/strong>.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-habilitando-o-firewall\">3. Habilitando o Firewall<\/h3>\n\n\n\n<p>Antes de criar regras, voc\u00ea deve ativar o modo de mitiga\u00e7\u00e3o:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Nos <code>...<\/code> do IP, clique em <strong>Ativar o Firewall<\/strong> (Enable Firewall).<\/li>\n\n\n\n<li>O \u00edcone do escudo ficar\u00e1 verde ou aparecer\u00e1 o status &#8220;Ativado&#8221;.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-criando-as-regras-passo-a-passo\">4. Criando as Regras (Passo a Passo)<\/h3>\n\n\n\n<p>Para adicionar regras, clique nos <code>...<\/code> do IP e selecione <strong>Configurar o Firewall<\/strong>. Voc\u00ea ver\u00e1 uma tabela vazia. Clique em <strong>Adicionar uma regra<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-regra-a-liberar-o-ssh-crucial\">Regra A: Liberar o SSH (CRUCIAL)<\/h4>\n\n\n\n<p>Fa\u00e7a isso primeiro para n\u00e3o se trancar para fora.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prioridade:<\/strong> <code>0<\/code><\/li>\n\n\n\n<li><strong>A\u00e7\u00e3o:<\/strong> <code>Autorizar<\/code><\/li>\n\n\n\n<li><strong>Protocolo:<\/strong> <code>TCP<\/code><\/li>\n\n\n\n<li><strong>IP de origem:<\/strong> Deixe em branco (para liberar para todos) ou coloque <em>apenas seu IP fixo de internet<\/em> (para seguran\u00e7a m\u00e1xima).<\/li>\n\n\n\n<li><strong>Porta de origem:<\/strong> Deixe em branco.<\/li>\n\n\n\n<li><strong>Porta de destino:<\/strong> <code>22<\/code> (ou a porta personalizada do seu SSH).<\/li>\n\n\n\n<li><strong>Estado:<\/strong> <code>Novo<\/code> (New) ou deixe em branco.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-regra-b-liberar-web-http-https-e-paineis\">Regra B: Liberar Web (HTTP\/HTTPS) e Pain\u00e9is<\/h4>\n\n\n\n<p>Se voc\u00ea hospeda sites ou usa cPanel\/DirectAdmin\/Plesk.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prioridade:<\/strong> <code>1<\/code><\/li>\n\n\n\n<li><strong>A\u00e7\u00e3o:<\/strong> <code>Autorizar<\/code><\/li>\n\n\n\n<li><strong>Protocolo:<\/strong> <code>TCP<\/code><\/li>\n\n\n\n<li><strong>Porta de destino:<\/strong> <code>80<\/code> (HTTP)<\/li>\n\n\n\n<li><strong>Prioridade:<\/strong> <code>2<\/code><\/li>\n\n\n\n<li><strong>A\u00e7\u00e3o:<\/strong> <code>Autorizar<\/code><\/li>\n\n\n\n<li><strong>Protocolo:<\/strong> <code>TCP<\/code><\/li>\n\n\n\n<li><strong>Porta de destino:<\/strong> <code>443<\/code> (HTTPS)<\/li>\n<\/ul>\n\n\n\n<p><em>(Repita o processo para portas de pain\u00e9is como 2083, 2087, 8080, se necess\u00e1rio).<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-regra-c-permitir-conexoes-estabelecidas-tcp-established\">Regra C: Permitir conex\u00f5es estabelecidas (TCP Established)<\/h4>\n\n\n\n<p>Isso \u00e9 vital. Se o seu servidor tentar baixar uma atualiza\u00e7\u00e3o (apt\/yum) ou responder a um ping, ele precisa receber a resposta de volta.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prioridade:<\/strong> <code>10<\/code><\/li>\n\n\n\n<li><strong>A\u00e7\u00e3o:<\/strong> <code>Autorizar<\/code><\/li>\n\n\n\n<li><strong>Protocolo:<\/strong> <code>TCP<\/code><\/li>\n\n\n\n<li><strong>Op\u00e7\u00f5es TCP:<\/strong> Selecione <code>Established<\/code>.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-regra-d-bloquear-todo-o-resto-o-muro\">Regra D: Bloquear todo o resto (O &#8220;Muro&#8221;)<\/h4>\n\n\n\n<p>Esta deve ser sempre a sua \u00faltima regra.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prioridade:<\/strong> <code>19<\/code><\/li>\n\n\n\n<li><strong>A\u00e7\u00e3o:<\/strong> <code>Recusar<\/code><\/li>\n\n\n\n<li><strong>Protocolo:<\/strong> <code>IPv4<\/code> (Isso seleciona todos os protocolos: TCP, UDP, ICMP, etc).<\/li>\n\n\n\n<li><strong>IP de origem\/destino:<\/strong> Deixe em branco.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5. Exemplo de Tabela Final<\/h3>\n\n\n\n<p>Sua tabela no painel da OVH deve ficar parecida com isto para um servidor web b\u00e1sico:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Prioridade<\/strong><\/td><td><strong>A\u00e7\u00e3o<\/strong><\/td><td><strong>Protocolo<\/strong><\/td><td><strong>Porta Destino<\/strong><\/td><td><strong>Notas<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>0<\/strong><\/td><td>Autorizar<\/td><td>TCP<\/td><td>22<\/td><td>Acesso SSH<\/td><\/tr><tr><td><strong>1<\/strong><\/td><td>Autorizar<\/td><td>TCP<\/td><td>80<\/td><td>Web HTTP<\/td><\/tr><tr><td><strong>2<\/strong><\/td><td>Autorizar<\/td><td>TCP<\/td><td>443<\/td><td>Web HTTPS<\/td><\/tr><tr><td><strong>3<\/strong><\/td><td>Autorizar<\/td><td>UDP<\/td><td>53<\/td><td>DNS (Se for servidor DNS)<\/td><\/tr><tr><td><strong>10<\/strong><\/td><td>Autorizar<\/td><td>TCP<\/td><td>&#8211;<\/td><td>Op\u00e7\u00e3o: Established (Respostas)<\/td><\/tr><tr><td><strong>11<\/strong><\/td><td>Autorizar<\/td><td>ICMP<\/td><td>&#8211;<\/td><td>Permitir Ping (Opcional)<\/td><\/tr><tr><td><strong>19<\/strong><\/td><td><strong>Recusar<\/strong><\/td><td><strong>IPv4<\/strong><\/td><td>&#8211;<\/td><td>Bloqueia todo o resto<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Dicas Importantes e Avisos<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>UDP:<\/strong> Se voc\u00ea usa jogos ou VPNs (OpenVPN\/Wireguard) que usam UDP, lembre-se de criar regras <code>Autorizar<\/code> com protocolo <code>UDP<\/code> nas portas espec\u00edficas antes da regra 19.<\/li>\n\n\n\n<li><strong>Demora na Aplica\u00e7\u00e3o:<\/strong> As regras na OVH podem levar de 30 segundos a 2 minutos para serem propagadas.<\/li>\n\n\n\n<li><strong>Firewall Local:<\/strong> Nunca desative seu firewall local (<code>iptables<\/code>\/<code>ufw<\/code>). O firewall da OVH \u00e9 uma prote\u00e7\u00e3o de borda; o local \u00e9 sua \u00faltima linha de defesa e permite controles mais finos (como bloquear por tentativas de login).<\/li>\n\n\n\n<li><strong>Mitiga\u00e7\u00e3o Permanente:<\/strong> Por padr\u00e3o, a OVH s\u00f3 ativa essas regras se detectar um ataque. Para que essas regras funcionem <strong>sempre<\/strong>, v\u00e1 nas configura\u00e7\u00f5es do IP e mude o modo de mitiga\u00e7\u00e3o de &#8220;Autom\u00e1tico&#8221; para <strong>&#8220;Mitiga\u00e7\u00e3o Permanente&#8221;<\/strong> (Permanent Mitigation).<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong><a href=\"https:\/\/helpsysadmin.com.br\" target=\"_blank\" rel=\"noreferrer noopener\">Clique aqui e consulte nossos planos de Gerenciamento de Servidor<\/a><\/strong><\/p>\n\n\n\n<p>Veja Mais: <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/guia-completo-do-directadmin-para-administradores\/\">Guia Completo do DirectAdmin para Administradores | Instala\u00e7\u00e3o, Seguran\u00e7a e Performance<\/a><\/strong><br>Veja Mais: <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-proteger-servidor-linux-seguranca\/\">Como Proteger seu Servidor Linux Contra Invas\u00f5es: O Guia Essencial de Hardening<\/a><\/strong><br>Veja Mais:<strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/configurar-lemp-com-wordpress-e-lets-encrypt\/\"> Como configurar lemp com wordpress e let\u00b4s encrypt<\/a><\/strong><br>Veja Mais: <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/instalar-engintron-nginx-cpanel\/\">Como instalar Engintron(NGINX) cPanel\/WHM<\/a><\/strong><br><br>See more: <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/en\/how-to-install-glances-to-monitor-the-server\/\">How to install Glances to monitor the server<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Configura\u00e7\u00e3o do firewall OVH \u00e9 uma excelente camada de seguran\u00e7a adicional ao firewall interno do seu servidor (como iptables, ufw ou firewalld). [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2064,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,1279,89],"tags":[13,18,3],"class_list":["post-2063","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gerenciamento-servidor","category-linux","category-seguranca-do-servidor","tag-linux","tag-seguranca","tag-servidor-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Configura\u00e7\u00e3o do firewall OVH - Blog HelpSysAdmin<\/title>\n<meta name=\"description\" content=\"Configura\u00e7\u00e3o do firewall OVH \u00e9 uma excelente camada de seguran\u00e7a adicional ao firewall interno do seu servidor.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/helpsysadmin.com.br\/blog\/configuracao-do-firewall-ovh\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Configura\u00e7\u00e3o do firewall OVH\" \/>\n<meta property=\"og:description\" content=\"Configura\u00e7\u00e3o do firewall OVH \u00e9 uma excelente camada de seguran\u00e7a adicional ao firewall interno do seu servidor.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/helpsysadmin.com.br\/blog\/configuracao-do-firewall-ovh\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog HelpSysAdmin\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-15T22:30:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-13T20:16:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mlkpd8g42nae.i.optimole.com\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2025\/12\/ovhcloud.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1120\" \/>\n\t<meta property=\"og:image:height\" content=\"315\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"HelpSysAdmin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@brhelpsysad\" \/>\n<meta name=\"twitter:site\" content=\"@brhelpsysad\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/configuracao-do-firewall-ovh\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/configuracao-do-firewall-ovh\\\/\"},\"author\":{\"name\":\"HelpSysAdmin\",\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/#\\\/schema\\\/person\\\/bdbe3d7d71a0c6a3cb474c18da574efb\"},\"headline\":\"Configura\u00e7\u00e3o do firewall OVH\",\"datePublished\":\"2025-12-15T22:30:30+00:00\",\"dateModified\":\"2026-01-13T20:16:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/configuracao-do-firewall-ovh\\\/\"},\"wordCount\":724,\"publisher\":{\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/configuracao-do-firewall-ovh\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\/\\/helpsysadmin.com.br\\/blog\\/wp-content\\/uploads\\/2025\\/12\\/ovhcloud.png\",\"keywords\":[\"linux\",\"seguran\u00e7a\",\"servidor linux\"],\"articleSection\":[\"Gerenciamento de Servidor\",\"Linux\",\"Seguran\u00e7a\"],\"inLanguage\":\"pt-BR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/configuracao-do-firewall-ovh\\\/\",\"url\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/configuracao-do-firewall-ovh\\\/\",\"name\":\"Configura\u00e7\u00e3o do firewall OVH - 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