{"id":15586,"date":"2026-06-07T22:57:32","date_gmt":"2026-06-08T01:57:32","guid":{"rendered":"https:\/\/www.homehost.com.br\/blog\/?p=15586"},"modified":"2026-06-07T23:00:22","modified_gmt":"2026-06-08T02:00:22","slug":"como-usar-o-flush-dns-o-guia-completo-do-comando","status":"publish","type":"post","link":"https:\/\/www.homehost.com.br\/blog\/internet\/como-usar-o-flush-dns-o-guia-completo-do-comando\/","title":{"rendered":"Como usar o flush DNS: o guia completo do comando"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">O flush DNS \u00e9 um dos comandos mais \u00fateis para resolver problemas de acesso a sites \u2014 e, ao mesmo tempo, um dos mais simples de executar. Se um site mudou de servidor, parou de carregar ou est\u00e1 exibindo uma vers\u00e3o antiga, limpar o cache de DNS da sua m\u00e1quina costuma resolver em segundos. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Neste guia completo, voc\u00ea vai aprender o que \u00e9 o flush DNS, como execut\u00e1-lo em todos os sistemas operacionais (Windows, macOS e Linux) e navegadores, e \u2014 o mais importante \u2014 quando ele realmente funciona e quando n\u00e3o adianta.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O que \u00e9 flush DNS?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Antes de executar o comando, vale entender o que ele faz. Toda vez que voc\u00ea acessa um site, o sistema operacional guarda o endere\u00e7o IP correspondente num armazenamento tempor\u00e1rio chamado <strong>cache de DNS<\/strong>. Isso acelera os pr\u00f3ximos acessos, porque o computador n\u00e3o precisa consultar um servidor DNS de novo a cada visita. Para entender o mecanismo por tr\u00e1s disso, vale ler o guia sobre <a href=\"https:\/\/www.homehost.com.br\/blog\/internet\/o-que-e-servidor-dns\/\">o que \u00e9 DNS<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O problema \u00e9 que esse cache pode ficar <strong>desatualizado ou corrompido<\/strong>. Se o site mudou de IP (por uma troca de hospedagem, por exemplo), seu computador pode continuar tentando acessar o endere\u00e7o antigo. O <strong>flush DNS<\/strong> \u00e9 justamente o comando que apaga esse cache local, for\u00e7ando o sistema a buscar os endere\u00e7os atualizados na pr\u00f3xima vez.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Como funciona o cache de DNS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O diagrama abaixo mostra a diferen\u00e7a entre um acesso com cache v\u00e1lido e um acesso ap\u00f3s o flush DNS:<\/p>\n\n\n\n<div style=\"overflow-x:auto; margin:28px 0;\">\n<svg width=\"100%\" viewBox=\"0 0 700 280\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"min-width:640px; font-family:inherit;\">\n  <defs>\n    <marker id=\"arrF\" viewBox=\"0 0 10 10\" refX=\"8\" refY=\"5\" markerWidth=\"6\" markerHeight=\"6\" orient=\"auto-start-reverse\">\n      <path d=\"M2 1L8 5L2 9\" fill=\"none\" stroke=\"#888\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n    <\/marker>\n  <\/defs>\n\n  <text x=\"350\" y=\"22\" text-anchor=\"middle\" font-size=\"13\" font-weight=\"600\" fill=\"#791F1F\">ANTES do flush DNS \u2014 cache desatualizado<\/text>\n\n  <rect x=\"20\" y=\"38\" width=\"120\" height=\"50\" rx=\"8\" fill=\"#E6F1FB\" stroke=\"#185FA5\" stroke-width=\"0.5\"\/>\n  <text x=\"80\" y=\"63\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"13\" font-weight=\"600\" fill=\"#0C447C\">Computador<\/text>\n  <line x1=\"140\" y1=\"63\" x2=\"178\" y2=\"63\" stroke=\"#888\" stroke-width=\"1.5\" marker-end=\"url(#arrF)\"\/>\n\n  <rect x=\"180\" y=\"38\" width=\"140\" height=\"50\" rx=\"8\" fill=\"#FCEBEB\" stroke=\"#A32D2D\" stroke-width=\"0.5\"\/>\n  <text x=\"250\" y=\"58\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"12\" font-weight=\"600\" fill=\"#791F1F\">Cache de DNS<\/text>\n  <text x=\"250\" y=\"74\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"11\" fill=\"#A32D2D\">IP antigo: 1.1.1.1<\/text>\n  <line x1=\"320\" y1=\"63\" x2=\"358\" y2=\"63\" stroke=\"#888\" stroke-width=\"1.5\" marker-end=\"url(#arrF)\"\/>\n\n  <rect x=\"360\" y=\"38\" width=\"150\" height=\"50\" rx=\"8\" fill=\"#FCEBEB\" stroke=\"#A32D2D\" stroke-width=\"0.5\"\/>\n  <text x=\"435\" y=\"58\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"12\" font-weight=\"600\" fill=\"#791F1F\">Servidor errado<\/text>\n  <text x=\"435\" y=\"74\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"11\" fill=\"#A32D2D\">site n\u00e3o carrega<\/text>\n\n  <line x1=\"350\" y1=\"120\" x2=\"350\" y2=\"148\" stroke=\"#3B6D11\" stroke-width=\"2\" marker-end=\"url(#arrF)\"\/>\n  <text x=\"430\" y=\"135\" text-anchor=\"middle\" font-size=\"12\" font-weight=\"600\" fill=\"#3B6D11\">flush DNS limpa o cache<\/text>\n\n  <text x=\"350\" y=\"172\" text-anchor=\"middle\" font-size=\"13\" font-weight=\"600\" fill=\"#27500A\">DEPOIS do flush DNS \u2014 busca o IP correto<\/text>\n\n  <rect x=\"20\" y=\"188\" width=\"120\" height=\"50\" rx=\"8\" fill=\"#E6F1FB\" stroke=\"#185FA5\" stroke-width=\"0.5\"\/>\n  <text x=\"80\" y=\"213\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"13\" font-weight=\"600\" fill=\"#0C447C\">Computador<\/text>\n  <line x1=\"140\" y1=\"213\" x2=\"178\" y2=\"213\" stroke=\"#888\" stroke-width=\"1.5\" marker-end=\"url(#arrF)\"\/>\n\n  <rect x=\"180\" y=\"188\" width=\"140\" height=\"50\" rx=\"8\" fill=\"#E1F5EE\" stroke=\"#0F6E56\" stroke-width=\"0.5\"\/>\n  <text x=\"250\" y=\"208\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"12\" font-weight=\"600\" fill=\"#04342C\">Consulta nova ao DNS<\/text>\n  <text x=\"250\" y=\"224\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"11\" fill=\"#0F6E56\">IP novo: 2.2.2.2<\/text>\n  <line x1=\"320\" y1=\"213\" x2=\"358\" y2=\"213\" stroke=\"#888\" stroke-width=\"1.5\" marker-end=\"url(#arrF)\"\/>\n\n  <rect x=\"360\" y=\"188\" width=\"150\" height=\"50\" rx=\"8\" fill=\"#E1F5EE\" stroke=\"#0F6E56\" stroke-width=\"0.5\"\/>\n  <text x=\"435\" y=\"208\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"12\" font-weight=\"600\" fill=\"#04342C\">Servidor correto<\/text>\n  <text x=\"435\" y=\"224\" text-anchor=\"middle\" dominant-baseline=\"central\" font-size=\"11\" fill=\"#0F6E56\">site carrega<\/text>\n<\/svg>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Como fazer o flush DNS em cada sistema operacional<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O comando varia conforme o sistema. A tabela abaixo re\u00fane o comando correto e atualizado para cada um:<\/p>\n\n\n\n<div style=\"overflow-x:auto; margin:28px 0; font-family:inherit;\">\n<table style=\"width:100%; border-collapse:collapse; font-size:14px; min-width:560px;\">\n  <thead>\n    <tr style=\"border-bottom:2px solid #ddd;\">\n      <th style=\"text-align:left; padding:13px 12px; width:20%; color:#666;\">Sistema<\/th>\n      <th style=\"text-align:left; padding:13px 12px; width:30%; color:#666;\">Onde executar<\/th>\n      <th style=\"text-align:left; padding:13px 12px; width:50%; color:#666;\">Comando<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td style=\"padding:12px; border-bottom:1px solid #eee; font-weight:600; color:#0C447C;\">Windows<\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\">Prompt de Comando<\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\"><code style=\"font-family:monospace; font-size:13px;\">ipconfig \/flushdns<\/code><\/td>\n    <\/tr>\n    <tr>\n      <td style=\"padding:12px; border-bottom:1px solid #eee; font-weight:600;\">macOS (atual)<\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\">Terminal<\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\"><code style=\"font-family:monospace; font-size:12.5px;\">sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder<\/code><\/td>\n    <\/tr>\n    <tr>\n      <td style=\"padding:12px; border-bottom:1px solid #eee; font-weight:600; color:#27500A;\">Linux (systemd)<\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\">Terminal<\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\"><code style=\"font-family:monospace; font-size:13px;\">sudo systemd-resolve --flush-caches<\/code><\/td>\n    <\/tr>\n    <tr>\n      <td style=\"padding:12px; font-weight:600; color:#27500A;\">Linux (nscd)<\/td>\n      <td style=\"padding:12px;\">Terminal<\/td>\n      <td style=\"padding:12px;\"><code style=\"font-family:monospace; font-size:13px;\">sudo \/etc\/init.d\/nscd restart<\/code><\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Windows: passo a passo<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No Windows, abra o menu Iniciar, digite <code><strong>cmd<\/strong><\/code>, clique com o bot\u00e3o direito em <strong>Prompt de Comando<\/strong> e escolha <strong>Executar como administrador<\/strong>. Em seguida, digite:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code>ipconfig \/flushdns<\/code><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">En seguida, pressione <strong>Enter<\/strong>. Voc\u00ea ver\u00e1 a mensagem de confirma\u00e7\u00e3o &#8220;Libera\u00e7\u00e3o do cache do DNS resolver bem-sucedida&#8221;.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/image.png\" alt=\"ipconfig \/flushdns no windows\" class=\"wp-image-15587\" width=\"470\" height=\"243\" srcset=\"https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/image.png 470w, https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/image-300x155.png 300w\" sizes=\"(max-width: 470px) 100vw, 470px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">macOS: passo a passo<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No Mac, abra o <strong>Terminal<\/strong> (pressione<strong> <code>Command + barra de espa\u00e7o<\/code><\/strong>, digite &#8220;<strong>terminal<\/strong>&#8221; e abra). Cole o comando:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code>sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder<\/code><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Em seguida, pressione Enter e digite sua senha de administrador quando solicitada.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flushcache-no-macos-1-1024x683.png\" alt=\"sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder no Macos\" class=\"wp-image-15592\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flushcache-no-macos-1-1024x683.png 1024w, https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flushcache-no-macos-1-300x200.png 300w, https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flushcache-no-macos-1-768x512.png 768w, https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flushcache-no-macos-1.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Linux: passo a passo<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No Linux, o comando depende do servi\u00e7o de DNS que sua distribui\u00e7\u00e3o usa. Nas distribui\u00e7\u00f5es modernas (Ubuntu, Debian recentes), que usam o <code><strong>systemd-resolved<\/strong><\/code>, o comando \u00e9:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code>sudo systemd-resolve --flush-caches<\/code><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Se o sistema usa o <code>nscd<\/code>, reinicie o servi\u00e7o com:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code>sudo \/etc\/init.d\/nscd restart<\/code><\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flush-caches-no-linux-1024x683.png\" alt=\"systemd-resolve flush-caches no Linux\" class=\"wp-image-15593\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flush-caches-no-linux-1024x683.png 1024w, https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flush-caches-no-linux-300x200.png 300w, https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flush-caches-no-linux-768x512.png 768w, https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flush-caches-no-linux.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"display:flex; gap:14px; background:#EAF3DE; border:1px solid #C0DD97; border-left:3px solid #3B6D11; border-radius:12px; padding:16px 18px; margin:24px 0; font-family:inherit;\">\n  <svg width=\"22\" height=\"22\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"#3B6D11\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"flex-shrink:0;\"><path d=\"M9 18h6M10 22h4M12 2a7 7 0 0 0-4 12.7c.5.4.8 1 .9 1.6h6.2c.1-.6.4-1.2.9-1.6A7 7 0 0 0 12 2\"\/><\/svg>\n  <div>\n    <div style=\"font-weight:600; font-size:15px; color:#27500A; margin-bottom:4px;\">Dica para usu\u00e1rios de Linux<\/div>\n    <div style=\"font-size:14px; color:#3B6D11; line-height:1.6;\">Nem toda distribui\u00e7\u00e3o Linux mant\u00e9m um cache de DNS por padr\u00e3o. Antes de rodar o comando, descubra qual servi\u00e7o o seu sistema usa com <strong>systemctl is-active systemd-resolved<\/strong>. Se o resultado for &#8220;active&#8221;, use o comando do systemd. Caso contr\u00e1rio, verifique se h\u00e1 nscd ou dnsmasq instalados.<\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Como limpar o cache de DNS no navegador<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Al\u00e9m do sistema operacional, os navegadores mant\u00eam seu pr\u00f3prio cache de DNS. \u00c0s vezes \u00e9 necess\u00e1rio limp\u00e1-lo tamb\u00e9m:<\/p>\n\n\n\n<div style=\"overflow-x:auto; margin:28px 0; font-family:inherit;\">\n<table style=\"width:100%; border-collapse:collapse; font-size:14px; min-width:560px;\">\n  <thead>\n    <tr style=\"border-bottom:2px solid #ddd;\">\n      <th style=\"text-align:left; padding:13px 12px; width:22%; color:#666;\">Navegador<\/th>\n      <th style=\"text-align:left; padding:13px 12px; width:43%; color:#666;\">Endere\u00e7o a digitar<\/th>\n      <th style=\"text-align:left; padding:13px 12px; width:35%; color:#666;\">A\u00e7\u00e3o<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td style=\"padding:12px; border-bottom:1px solid #eee; font-weight:600;\">Google Chrome<\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\"><code style=\"font-family:monospace; font-size:12.5px;\">chrome:\/\/net-internals\/#dns<\/code><\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\">Clique em &#8220;Clear host cache&#8221;<\/td>\n    <\/tr>\n    <tr>\n      <td style=\"padding:12px; border-bottom:1px solid #eee; font-weight:600;\">Microsoft Edge<\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\"><code style=\"font-family:monospace; font-size:12.5px;\">edge:\/\/net-internals\/#dns<\/code><\/td>\n      <td style=\"padding:12px; border-bottom:1px solid #eee;\">Clique em &#8220;Clear host cache&#8221;<\/td>\n    <\/tr>\n    <tr>\n      <td style=\"padding:12px; font-weight:600;\">Mozilla Firefox<\/td>\n      <td style=\"padding:12px;\"><code style=\"font-family:monospace; font-size:12.5px;\">about:networking#dns<\/code><\/td>\n      <td style=\"padding:12px;\">Clique em &#8220;Limpar cache de DNS&#8221;<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Quando o flush DNS N\u00c3O resolve o problema<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Esse \u00e9 o ponto que poucos artigos explicam \u2014 e \u00e9 fundamental. O flush DNS limpa apenas o cache <strong>local da sua m\u00e1quina<\/strong>. Ele n\u00e3o resolve problemas que est\u00e3o fora do seu computador. Veja os casos em que <a href=\"https:\/\/www.homehost.com.br\/blog\/internet\/limpar-cache\/\">limpar o cache<\/a> de DNS n\u00e3o vai adiantar:<\/p>\n\n\n\n<div style=\"display:flex; gap:14px; background:#FAEEDA; border:1px solid #FAC775; border-left:3px solid #BA7517; border-radius:12px; padding:16px 18px; margin:24px 0; font-family:inherit;\">\n  <svg width=\"22\" height=\"22\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"#854F0B\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"flex-shrink:0;\"><path d=\"M12 9v4M12 17h.01M10.3 3.9 1.8 18a2 2 0 0 0 1.7 3h17a2 2 0 0 0 1.7-3L13.7 3.9a2 2 0 0 0-3.4 0z\"\/><\/svg>\n  <div>\n    <div style=\"font-weight:600; font-size:15px; color:#633806; margin-bottom:6px;\">Quando o flush DNS n\u00e3o vai ajudar<\/div>\n    <div style=\"font-size:14px; color:#854F0B; line-height:1.6;\">\n      <strong>Propaga\u00e7\u00e3o de DNS:<\/strong> se voc\u00ea acabou de alterar o DNS de um dom\u00ednio, a mudan\u00e7a leva at\u00e9 24h para se espalhar pela internet. O flush local n\u00e3o acelera isso.<br><br>\n      <strong>DNS mal configurado no dom\u00ednio:<\/strong> se os servidores de nome (NS) est\u00e3o errados, o problema \u00e9 na configura\u00e7\u00e3o do dom\u00ednio, n\u00e3o no seu cache.<br><br>\n      <strong>Site fora do ar:<\/strong> se o servidor de hospedagem est\u00e1 com problemas, nenhum flush resolve \u2014 o site simplesmente n\u00e3o est\u00e1 respondendo.\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Nesses casos, vale entender melhor <a href=\"https:\/\/www.homehost.com.br\/blog\/perguntas-frequentes\/o-que-e-propagacao-de-dns\/\">como funciona a propaga\u00e7\u00e3o de DNS<\/a> ou conferir o guia geral de <a href=\"https:\/\/www.homehost.com.br\/blog\/dominio\/como-resolver-problema-de-dns\/\">como resolver problemas de DNS<\/a>. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Se o erro que voc\u00ea v\u00ea \u00e9 especificamente o <code><strong>DNS_PROBE_FINISHED_NXDOMAIN<\/strong><\/code>, h\u00e1 um artigo dedicado a <a href=\"https:\/\/www.homehost.com.br\/blog\/internet\/dns-probe-finished-nxdomain\/\">resolver esse erro<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quando vale a pena fazer o flush DNS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O gr\u00e1fico abaixo resume as situa\u00e7\u00f5es mais comuns em que o flush DNS \u00e9 a solu\u00e7\u00e3o certa:<\/p>\n\n\n\n<div style=\"margin:24px 0; font-family:inherit;\">\n<div style=\"display:flex; flex-direction:column; gap:14px;\">\n\n  <div>\n    <div style=\"display:flex; justify-content:space-between; font-size:13px; margin-bottom:5px;\"><span>Site mudou de servidor\/hospedagem<\/span><span style=\"color:#888;\">Alta efic\u00e1cia<\/span><\/div>\n    <div style=\"background:#f0f0f0; border-radius:6px; height:22px;\"><div style=\"width:92%; height:100%; background:#2C7A7B; border-radius:6px;\"><\/div><\/div>\n  <\/div>\n\n  <div>\n    <div style=\"display:flex; justify-content:space-between; font-size:13px; margin-bottom:5px;\"><span>Site exibindo vers\u00e3o\/IP antigo<\/span><span style=\"color:#888;\">Alta efic\u00e1cia<\/span><\/div>\n    <div style=\"background:#f0f0f0; border-radius:6px; height:22px;\"><div style=\"width:85%; height:100%; background:#2C7A7B; border-radius:6px;\"><\/div><\/div>\n  <\/div>\n\n  <div>\n    <div style=\"display:flex; justify-content:space-between; font-size:13px; margin-bottom:5px;\"><span>Erro &#8220;servidor n\u00e3o encontrado&#8221;<\/span><span style=\"color:#888;\">M\u00e9dia efic\u00e1cia<\/span><\/div>\n    <div style=\"background:#f0f0f0; border-radius:6px; height:22px;\"><div style=\"width:60%; height:100%; background:#378ADD; border-radius:6px;\"><\/div><\/div>\n  <\/div>\n\n  <div>\n    <div style=\"display:flex; justify-content:space-between; font-size:13px; margin-bottom:5px;\"><span>Lentid\u00e3o geral de navega\u00e7\u00e3o<\/span><span style=\"color:#888;\">Baixa efic\u00e1cia<\/span><\/div>\n    <div style=\"background:#f0f0f0; border-radius:6px; height:22px;\"><div style=\"width:30%; height:100%; background:#BA7517; border-radius:6px;\"><\/div><\/div>\n  <\/div>\n\n<\/div>\n<p style=\"font-size:12px; color:#888; margin-top:12px;\">Indica\u00e7\u00e3o geral de quando o flush DNS tende a resolver. Em problemas fora da m\u00e1quina local, a efic\u00e1cia \u00e9 baixa.<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Perguntas frequentes sobre flush DNS<\/h2>\n\n\n\n<div style=\"display:flex; flex-direction:column; gap:10px; margin:24px 0; font-family:inherit;\">\n\n  <details style=\"background:#fff; border:1px solid #eee; border-radius:12px; padding:4px 18px;\">\n    <summary style=\"cursor:pointer; padding:14px 0; font-weight:600;\">O que \u00e9 flush DNS?<\/summary>\n    <div style=\"padding:0 0 16px; color:#555; line-height:1.65;\">Flush DNS \u00e9 o procedimento de limpar o cache de DNS armazenado no seu computador. Esse cache guarda os endere\u00e7os IP dos sites que voc\u00ea acessou, e quando fica desatualizado pode impedir o acesso a um site que mudou de servidor. Ao fazer o flush, voc\u00ea for\u00e7a o sistema a buscar os endere\u00e7os atualizados.<\/div>\n  <\/details>\n\n  <details style=\"background:#fff; border:1px solid #eee; border-radius:12px; padding:4px 18px;\">\n    <summary style=\"cursor:pointer; padding:14px 0; font-weight:600;\">Qual o comando de flush DNS no Windows?<\/summary>\n    <div style=\"padding:0 0 16px; color:#555; line-height:1.65;\">No Windows, abra o Prompt de Comando como administrador e digite ipconfig \/flushdns, depois pressione Enter. Uma mensagem confirmar\u00e1 que o cache do DNS foi liberado com sucesso. O comando funciona da mesma forma no Windows 10 e no Windows 11.<\/div>\n  <\/details>\n\n  <details style=\"background:#fff; border:1px solid #eee; border-radius:12px; padding:4px 18px;\">\n    <summary style=\"cursor:pointer; padding:14px 0; font-weight:600;\">Fazer flush DNS \u00e9 seguro?<\/summary>\n    <div style=\"padding:0 0 16px; color:#555; line-height:1.65;\">Sim, \u00e9 totalmente seguro. O comando apenas apaga uma lista tempor\u00e1ria de endere\u00e7os que o sistema recria automaticamente conforme voc\u00ea navega. N\u00e3o afeta arquivos, senhas ou configura\u00e7\u00f5es do computador. O \u00fanico efeito \u00e9 que os primeiros acessos ap\u00f3s o flush podem ser um pouco mais lentos, enquanto o cache \u00e9 reconstru\u00eddo.<\/div>\n  <\/details>\n\n  <details style=\"background:#fff; border:1px solid #eee; border-radius:12px; padding:4px 18px;\">\n    <summary style=\"cursor:pointer; padding:14px 0; font-weight:600;\">O flush DNS acelera minha internet?<\/summary>\n    <div style=\"padding:0 0 16px; color:#555; line-height:1.65;\">N\u00e3o diretamente. O flush DNS resolve problemas de acesso causados por cache desatualizado, mas n\u00e3o aumenta a velocidade da sua conex\u00e3o. Na verdade, logo ap\u00f3s o flush, a navega\u00e7\u00e3o pode ficar momentaneamente mais lenta, j\u00e1 que o cache precisa ser reconstru\u00eddo do zero.<\/div>\n  <\/details>\n\n  <details style=\"background:#fff; border:1px solid #eee; border-radius:12px; padding:4px 18px;\">\n    <summary style=\"cursor:pointer; padding:14px 0; font-weight:600;\">Fiz o flush DNS e o site ainda n\u00e3o abre. O que fazer?<\/summary>\n    <div style=\"padding:0 0 16px; color:#555; line-height:1.65;\">Se o flush n\u00e3o resolveu, o problema provavelmente est\u00e1 fora da sua m\u00e1quina. Pode ser propaga\u00e7\u00e3o de DNS (caso o dom\u00ednio tenha sido alterado h\u00e1 pouco), configura\u00e7\u00e3o incorreta dos servidores de nome, ou o pr\u00f3prio site fora do ar. Nesses casos, verifique a configura\u00e7\u00e3o do dom\u00ednio ou contate o suporte da hospedagem.<\/div>\n  <\/details>\n\n<\/div>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"O que \u00e9 flush DNS?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Flush DNS \u00e9 o procedimento de limpar o cache de DNS armazenado no seu computador. Esse cache guarda os endere\u00e7os IP dos sites que voc\u00ea acessou, e quando fica desatualizado pode impedir o acesso a um site que mudou de servidor. Ao fazer o flush, voc\u00ea for\u00e7a o sistema a buscar os endere\u00e7os atualizados.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Qual o comando de flush DNS no Windows?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No Windows, abra o Prompt de Comando como administrador e digite ipconfig \/flushdns, depois pressione Enter. Uma mensagem confirmar\u00e1 que o cache do DNS foi liberado com sucesso. O comando funciona da mesma forma no Windows 10 e no Windows 11.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Fazer flush DNS \u00e9 seguro?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Sim, \u00e9 totalmente seguro. O comando apenas apaga uma lista tempor\u00e1ria de endere\u00e7os que o sistema recria automaticamente conforme voc\u00ea navega. N\u00e3o afeta arquivos, senhas ou configura\u00e7\u00f5es do computador. O \u00fanico efeito \u00e9 que os primeiros acessos ap\u00f3s o flush podem ser um pouco mais lentos, enquanto o cache \u00e9 reconstru\u00eddo.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"O flush DNS acelera minha internet?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"N\u00e3o diretamente. O flush DNS resolve problemas de acesso causados por cache desatualizado, mas n\u00e3o aumenta a velocidade da sua conex\u00e3o. Na verdade, logo ap\u00f3s o flush, a navega\u00e7\u00e3o pode ficar momentaneamente mais lenta, j\u00e1 que o cache precisa ser reconstru\u00eddo do zero.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Fiz o flush DNS e o site ainda n\u00e3o abre. O que fazer?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Se o flush n\u00e3o resolveu, o problema provavelmente est\u00e1 fora da sua m\u00e1quina. Pode ser propaga\u00e7\u00e3o de DNS (caso o dom\u00ednio tenha sido alterado h\u00e1 pouco), configura\u00e7\u00e3o incorreta dos servidores de nome, ou o pr\u00f3prio site fora do ar. Nesses casos, verifique a configura\u00e7\u00e3o do dom\u00ednio ou contate o suporte da hospedagem.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n\n\n<div style=\"background:#E6F1FB; border:1px solid #B5D4F4; border-radius:16px; padding:28px 30px; text-align:center; margin:32px 0; font-family:inherit;\">\n  <div style=\"display:inline-flex; align-items:center; justify-content:center; width:52px; height:52px; border-radius:50%; background:#fff; margin-bottom:14px;\">\n    <svg width=\"26\" height=\"26\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"#185FA5\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"3\" y=\"4\" width=\"18\" height=\"8\" rx=\"2\"\/><rect x=\"3\" y=\"12\" width=\"18\" height=\"8\" rx=\"2\"\/><path d=\"M7 8h.01M7 16h.01\"\/><\/svg>\n  <\/div>\n  <div style=\"font-size:20px; font-weight:600; color:#0C447C; margin-bottom:8px;\">Vai mudar seu site de hospedagem?<\/div>\n  <div style=\"font-size:15px; color:#185FA5; line-height:1.6; max-width:500px; margin:0 auto 20px;\">Trocar de servidor envolve mexer no DNS \u2014 e \u00e9 a\u00ed que muita gente trava. Com a Homehost, a migra\u00e7\u00e3o \u00e9 feita com apoio da nossa equipe e o DNS configurado corretamente, para o seu site continuar no ar sem dor de cabe\u00e7a.<\/div>\n  <a href=\"https:\/\/www.homehost.com.br\/hospedagem-de-sites\/\" style=\"display:inline-flex; align-items:center; gap:8px; background:#185FA5; color:#fff; text-decoration:none; padding:12px 26px; border-radius:8px; font-size:15px; font-weight:600;\">\n    <svg width=\"18\" height=\"18\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"#fff\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"M2 12h20M12 2a15 15 0 0 1 0 20 15 15 0 0 1 0-20\"\/><\/svg>\n    Conhecer planos de hospedagem\n  <\/a>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Conclus\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O flush DNS \u00e9 uma ferramenta simples e segura que resolve boa parte dos problemas de acesso a sites \u2014 especialmente quando um dom\u00ednio mudou de servidor e seu computador insiste em buscar o endere\u00e7o antigo. Basta um comando no terminal ou prompt, sem riscos para o sistema. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mas lembre-se: ele s\u00f3 limpa o cache local. Se o problema estiver na propaga\u00e7\u00e3o ou na configura\u00e7\u00e3o do dom\u00ednio, a solu\u00e7\u00e3o est\u00e1 do lado do servidor, n\u00e3o da sua m\u00e1quina.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O flush DNS \u00e9 um dos comandos mais \u00fateis para resolver problemas de acesso a sites \u2014 e, ao mesmo tempo, um dos mais simples de executar. Se um site mudou de servidor, parou de carregar ou est\u00e1 exibindo uma vers\u00e3o antiga, limpar o cache de DNS da sua m\u00e1quina costuma resolver em segundos. Neste [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15588,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_helpful_status":1,"_lmt_disableupdate":"","_lmt_disable":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[203],"tags":[],"class_list":["post-15586","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-internet"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Como usar o flush DNS: o guia completo do comando | Homehost<\/title>\n<meta name=\"description\" content=\"Aprenda como usar o flush DNS para limpar o cache e resolver problemas de acesso a sites. 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Comando passo a passo para Windows, Mac, Linux e navegadores.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.homehost.com.br\/blog\/internet\/como-usar-o-flush-dns-o-guia-completo-do-comando\/\" \/>\n<meta property=\"og:site_name\" content=\"Homehost\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Homehost\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-06-08T01:57:32+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-08T02:00:22+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flush-dns.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1536\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Gustavo Gallas\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Homehost\" \/>\n<meta name=\"twitter:site\" content=\"@Homehost\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gustavo Gallas\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.homehost.com.br\/blog\/internet\/como-usar-o-flush-dns-o-guia-completo-do-comando\/\",\"url\":\"https:\/\/www.homehost.com.br\/blog\/internet\/como-usar-o-flush-dns-o-guia-completo-do-comando\/\",\"name\":\"Como usar o flush DNS: o guia completo do comando | Homehost\",\"isPartOf\":{\"@id\":\"https:\/\/www.homehost.com.br\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.homehost.com.br\/blog\/internet\/como-usar-o-flush-dns-o-guia-completo-do-comando\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.homehost.com.br\/blog\/internet\/como-usar-o-flush-dns-o-guia-completo-do-comando\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.homehost.com.br\/blog\/wp-content\/uploads\/2026\/06\/flush-dns.png\",\"datePublished\":\"2026-06-08T01:57:32+00:00\",\"dateModified\":\"2026-06-08T02:00:22+00:00\",\"author\":{\"@id\":\"https:\/\/www.homehost.com.br\/blog\/#\/schema\/person\/df8002f43fc55e7f4e132abb2a6ddbc4\"},\"description\":\"Aprenda como usar o flush DNS para limpar o cache e resolver problemas de acesso a sites. 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