{"id":45338,"date":"2021-12-01T11:26:42","date_gmt":"2021-12-01T14:26:42","guid":{"rendered":"https:\/\/kinqsta.com\/pt\/?p=45338&#038;post_type=knowledgebase&#038;preview_id=45338"},"modified":"2025-10-01T17:05:38","modified_gmt":"2025-10-01T20:05:38","slug":"warning-remote-host-identification-has-changed","status":"publish","type":"post","link":"https:\/\/kinqsta.com\/pt\/blog\/warning-remote-host-identification-has-changed\/","title":{"rendered":"Como Corrigir o Erro \u201cWarning: Remote Host Identification Has Changed\u201d"},"content":{"rendered":"<p>Uma conex\u00e3o segura com a internet n\u00e3o \u00e9 apenas o ideal &#8211; \u00e9 essencial. Na verdade, n\u00f3s vamos ao ponto de dizer que \u00e9 a prioridade n\u00famero um para o seu site. O erro \u201cWarning: Remote Host Identification Has Changed\u201d protege sua conex\u00e3o de certos ataques maliciosos, embora em alguns casos, voc\u00ea possa inadvertidamente causar o erro tamb\u00e9m.<\/p>\n<p>O erro est\u00e1 relacionado com suas <a href=\"https:\/\/kinqsta.com\/pt\/blog\/ssh-vs-ssl\/\">chaves do Secure Shell (SSH<\/a> ) e o servidor &#8220;fingerprint&#8221; que um cliente ir\u00e1 verificar. Se o Secure Shell achar que h\u00e1 um problema, ele bloquear\u00e1 o acesso ao seu servidor e lan\u00e7ar\u00e1 um erro. Mas voc\u00ea pode corrigir isso em alguns passos.<\/p>\n<p>Nos pr\u00f3ximos minutos, n\u00f3s vamos mostrar a voc\u00ea como corrigir o erro \u201cWarning: Remote Host Identification Has Changed\u201d tanto para Windows quanto para Mac. Primeiro, por\u00e9m, vamos lhe dar mais alguns detalhes sobre a mensagem de erro em si.<\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n\n<h2>O que \u00e9\u00a0\u201cWarning: Remote Host Identification Has Changed\u201d<\/h2>\n<p>Uma das formas mais seguras de se conectar a um servidor web \u00e9 <a href=\"https:\/\/kinqsta.com\/pt\/blog\/usar-ssh\/\" rel=\"noopener\">usar o SSH<\/a>. \u00c9 uma ferramenta de linha de comando que permite a voc\u00ea acessar uma rede insegura de forma segura. Considere-o como uma configura\u00e7\u00e3o do tipo &#8220;super-SFTP&#8221;, embora n\u00e3o seja uma compara\u00e7\u00e3o 1:1 na pr\u00e1tica.<\/p>\n<p>Voc\u00ea pode acessar seu site de quase qualquer lugar que voc\u00ea possa usar a internet, desde que voc\u00ea tenha as credenciais de login corretas. E mais, a maioria das m\u00e1quinas MacOS e Linux tem um cliente SSH incorporado no Sistema Operacional (SO). Para Windows, voc\u00ea usar\u00e1 uma interface dedicada (e falaremos sobre isso com mais detalhes mais tarde).<\/p>\n<p>Quanto ao erro \u201cWarning: Remote Host Identification Has Changed\u201d est\u00e1 relacionado com as verifica\u00e7\u00f5es de seguran\u00e7a que seu cliente far\u00e1. Uma conex\u00e3o SSH usa &#8220;chaves&#8221; dedicadas de pequenos arquivos armazenados em seu computador &#8211; como autentica\u00e7\u00e3o. \u00c9 como um <a href=\"https:\/\/kinqsta.com\/pt\/blog\/ssl-handshake-failed\/\" rel=\"noopener\">aperto de m\u00e3o do Secure Sockets Layers (SSL)<\/a>, e na verdade, h\u00e1 algumas <a href=\"https:\/\/kinqsta.com\/pt\/blog\/ssh-vs-ssl\/\">semelhan\u00e7as de alto n\u00edvel entre SSH e SSL<\/a>.<\/p>\n<p>Um aspecto com o qual as chaves ajudam \u00e9 a fornecer uma impress\u00e3o digital (fingerprint) permanente de seu servidor de hospedagem. Isto garantir\u00e1 que a conex\u00e3o seja precisa e que voc\u00ea n\u00e3o esteja sujeito a um <a href=\"https:\/\/www.blackhillsinfosec.com\/machine-in-the-middle-mitm-ble-attack\/\">ataque &#8220;machine-in-the-middle&#8221;<\/a>.<\/p>\n<p>Se o cliente achar que essas impress\u00f5es digitais s\u00e3o diferentes do que ele entende ser correto, voc\u00ea receber\u00e1 o erro \u201cWarning: Remote Host Identification Has Changed\u201d no momento do login:<\/p>\n<pre><code class=\"language-bash\">[user@hostname ~]$ ssh root@user\n\n@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n\n@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @\n\n@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n\nIT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!\n\nSomeone could be eavesdropping on you right now (man-in-the-middle attack)!\n\nIt is also possible that a host key has just been changed.\n\nThe fingerprint for the RSA key sent by the remote host is\n\nxx:xx:xx.\n\nPlease contact your system administrator.\n\nAdd correct host key in \/home\/hostname \/.ssh\/known_hosts to get rid of this message.\n\nOffending RSA key in \/var\/lib\/sss\/pubconf\/known_hosts:4\n\nRSA host key for user has changed and you have requested strict checking.\n\nHost key verification failed.<\/code><\/pre>\n<p>Conforme os erros v\u00e3o ocorrendo, isto \u00e9 detalhado e claro &#8211; ele diz a voc\u00ea o que aconteceu, uma raz\u00e3o potencial para o porqu\u00ea, e como voc\u00ea pode corrigir.<\/p>\n<p>No entanto, h\u00e1 um aspecto que podemos tocar um pouco mais antes de mostrar a voc\u00ea como corrigir o erro \u201cWarning: Remote Host Identification Has Changed\u201d.<\/p>\n<h3>Como o arquivo known_hosts ajuda a autentica\u00e7\u00e3o SSH<\/h3>\n<p>Voc\u00ea notar\u00e1 que a mensagem de erro faz refer\u00eancia a um <a href=\"https:\/\/kinqsta.com\/pt\/docs\/hospedagem-de-wordpress\/solucao-de-problemas-wordpress\/nao-consegue-conectar-excluir-hosts-conhecidos-ssh\/\" rel=\"noopener\">known_hosts conhecido<\/a>. O nome deve dar a voc\u00ea uma pista sobre o que ele cont\u00e9m, mas para maior clareza, \u00e9 uma lista de hosts remotos SSH conhecidos pelo computador. Ele \u00e9 usado como um arquivo cliente de refer\u00eancia para o processo de autentica\u00e7\u00e3o.<\/p>\n<p>Quando voc\u00ea se conecta a um servidor pela primeira vez, voc\u00ea frequentemente recebe um pedido de confirma\u00e7\u00e3o atrav\u00e9s de sua interface, perguntando se voc\u00ea quer se conectar. Se assim for, esta impress\u00e3o digital (fingerprint) se tornar\u00e1 parte do seu arquivo <strong>known_hosts<\/strong>.<\/p>\n<p>\u00c9 claro, se a impress\u00e3o digital (fingerprint) for diferente do que est\u00e1 no arquivo <strong>known_hosts<\/strong>, isso pode indicar que um usu\u00e1rio malicioso est\u00e1 visando voc\u00ea. Em outros casos, voc\u00ea j\u00e1 pode saber porque h\u00e1 uma diferen\u00e7a, apesar de que vale a pena estar vigilante independentemente.<\/p>\n<h2>Como corrigir o erro \u201cWarning: Remote Host Identification Has Changed\u201d (no Windows e Mac)<\/h2>\n<p>Voc\u00ea pode trabalhar para corrigir o erro \u201cWarning: Remote Host Identification Has Changed\u201d tanto para <a href=\"https:\/\/kinqsta.com\/pt\/blog\/dns-server-not-responding\/\">Windows quanto para macOS<\/a>. No entanto, voc\u00ea tem mais flexibilidade para fazer isso no Mac.<\/p>\n<p>N\u00f3s cobriremos muitas das maneiras que voc\u00ea pode fazer as coisas certas novamente, come\u00e7ando com o Windows.<\/p>\n<aside role=\"note\" class=\"wp-block-kinsta-notice is-style-important\">\n            <h3>Important<\/h3>\n        <p>Voc\u00ea n\u00e3o deve tentar corrigir o erro a menos que voc\u00ea tenha total confian\u00e7a de que o problema n\u00e3o \u00e9 malicioso. Se voc\u00ea tem certeza de que n\u00e3o h\u00e1 risco de seguran\u00e7a amea\u00e7ando sua conex\u00e3o, os passos abaixo s\u00e3o para voc\u00ea<\/p>\n<\/aside>\n\n<h3>1. Windows<\/h3>\n<p>\u00c9 importante notar que as m\u00e1quinas Windows podem n\u00e3o ter um <strong>known_hosts<\/strong>. Entretanto, se voc\u00ea usar o <a href=\"https:\/\/www.openssh.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">cliente OpenSSH<\/a>, <em>h\u00e1<\/em> um arquivo. Para encontr\u00e1-lo, abra a barra de busca do Windows, e navegue at\u00e9 sua pasta de usu\u00e1rio com o comando <strong>%USERPROFILE%<\/strong>.<\/p>\n<p>Isto abrir\u00e1 o diret\u00f3rio dentro do <strong>File Explorer<\/strong>. Haver\u00e1 tamb\u00e9m uma pasta <strong>.ssh<\/strong> dentro:<\/p>\n<figure id=\"attachment_102407\" aria-describedby=\"caption-attachment-102407\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-102407 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/08\/file-explorer.png\" alt=\"O Windows File Explorer.\" width=\"1000\" height=\"544\"><figcaption id=\"caption-attachment-102407\" class=\"wp-caption-text\">O Windows File Explorer.<\/figcaption><\/figure>\n<p>O arquivo que n\u00f3s queremos nesta pasta \u00e9 <strong>known_hosts<\/strong>. Voc\u00ea pode abrir este arquivo com o Notepad (ou seu <a href=\"https:\/\/kinqsta.com\/pt\/blog\/melhores-editores-texto\/\" rel=\"noopener\">editor de texto favorito<\/a>). Dentro estar\u00e1 uma lista de chaves:<\/p>\n<figure id=\"attachment_102414\" aria-describedby=\"caption-attachment-102414\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-102414 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/08\/windows-known-hosts.png\" alt=\"O arquivo Windows known_hosts\" width=\"1000\" height=\"184\"><figcaption id=\"caption-attachment-102414\" class=\"wp-caption-text\">O arquivo Windows known_hosts<\/figcaption><\/figure>\n<p>Aqui, voc\u00ea pode apagar a chave que est\u00e1 causando o problema, e ent\u00e3o salvar novamente o arquivo.<\/p>\n<p>Alguns usu\u00e1rios podem preferir o <a href=\"https:\/\/www.chiark.greenend.org.uk\/~sgtatham\/putty\/\" target=\"_blank\" rel=\"noopener noreferrer\">cliente PuTTY<\/a>. As chaves se encontram no Registro, embora elas tenham o mesmo prop\u00f3sito do OpenSSH.<\/p>\n<p>Voc\u00ea vai querer abrir o Editor do Registro do Windows (tamb\u00e9m conhecido como &#8220;regedit&#8221;). Voc\u00ea pode fazer isso da maneira que voc\u00ea estiver confort\u00e1vel, mas a maneira mais r\u00e1pida \u00e9 digitar o nome do aplicativo na barra de busca do Window:<\/p>\n<figure id=\"attachment_102411\" aria-describedby=\"caption-attachment-102411\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-102411 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/08\/regedit.png\" alt=\"O link do Editor de Registro no menu Iniciar do Windows.\" width=\"1000\" height=\"674\"><figcaption id=\"caption-attachment-102411\" class=\"wp-caption-text\">O link do Editor de Registro no menu Iniciar do Windows.<\/figcaption><\/figure>\n<p>Aqui, procure o seguinte destino dentro do <strong>regedit<\/strong>:<\/p>\n<pre><code class=\"language-bash\">HKEY_CURRENT_USER\/Software\/SimonTatham\/PuTTY\/SshHostKeys\/<\/code><\/pre>\n<p>Voc\u00ea ver\u00e1 aqui uma lista de entradas relacionadas com as conex\u00f5es salvas em seu computador. Seu trabalho \u00e9 apagar o que quer que esteja causando um problema:<\/p>\n<figure id=\"attachment_102410\" aria-describedby=\"caption-attachment-102410\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-102410 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/08\/regedit-host-keys-putty.png\" alt=\"Apagar uma chave de registro no regedit.\" width=\"1000\" height=\"385\"><figcaption id=\"caption-attachment-102410\" class=\"wp-caption-text\">Apagar uma chave de registro no regedit.<\/figcaption><\/figure>\n<p>Uma vez que voc\u00ea clique no bot\u00e3o <strong>Delete<\/strong>, voc\u00ea tamb\u00e9m precisar\u00e1 confirmar que deseja remover a chave:<\/p>\n<figure id=\"attachment_102409\" aria-describedby=\"caption-attachment-102409\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-102409 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/08\/putty-confirm.png\" alt=\"O di\u00e1logo Confirmar Valor Apagar\" width=\"1000\" height=\"291\"><figcaption id=\"caption-attachment-102409\" class=\"wp-caption-text\">O di\u00e1logo Confirmar Valor Apagar<\/figcaption><\/figure>\n<p>Clicando em <strong>Sim<\/strong> aqui significa que a chave desaparecer\u00e1 de vez, e voc\u00ea n\u00e3o deve receber o erro \u201cWarning: Remote Host Identification Has Changed\u201d.<\/p>\n<h3>2. Mac<\/h3>\n<p>O Mac tem algumas maneiras de corrigir o erro \u201cWarning: Remote Host Identification Has Changed\u201d &#8211; seja atrav\u00e9s de um aplicativo premium como o <a href=\"https:\/\/hejki.org\/ssheditor\/\" target=\"_blank\" rel=\"noopener noreferrer\">SSH Config Editor<\/a> ou o Terminal. Os resultados ser\u00e3o os mesmos, ent\u00e3o aconselhamos que voc\u00ea escolha a op\u00e7\u00e3o que for mais confort\u00e1vel (e de melhor custo-benef\u00edcio).<\/p>\n<p>Nossa abordagem preferida \u00e9 acessar o arquivo dentro de uma janela do Terminal (ou <a href=\"https:\/\/iterm2.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">iTerm2<\/a> se voc\u00ea usar esse aplicativo), e tamb\u00e9m abri-lo com um editor <a href=\"https:\/\/www.nano-editor.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">Nano<\/a> ou <a href=\"https:\/\/www.vim.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">Vim<\/a> dedicado. Isto porque ele \u00e9 acess\u00edvel a todos e f\u00e1cil de usar, independentemente do seu n\u00edvel de experi\u00eancia.<\/p>\n<p>Aqui, n\u00f3s vamos usar Nano. Primeiro, abra seu Terminal usando o processo que for mais confort\u00e1vel:<\/p>\n<figure id=\"attachment_102412\" aria-describedby=\"caption-attachment-102412\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-102412 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/08\/spotlight-terminal.png\" alt=\"Abrindo o Terminal a partir do Spotlight.\" width=\"1000\" height=\"709\"><figcaption id=\"caption-attachment-102412\" class=\"wp-caption-text\">Abrindo o Terminal a partir do Spotlight.<\/figcaption><\/figure>\n<p>A partir daqui, execute o comando <code>nano ~\/.ssh\/known_hosts<\/code> em sua janela. Isto abrir\u00e1 uma nova inst\u00e2ncia Nano e exibir\u00e1 as chaves dentro do seu arquivo <strong>known_hosts<\/strong>:<\/p>\n<figure id=\"attachment_102408\" aria-describedby=\"caption-attachment-102408\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-102408 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/08\/nano-known-hosts.png\" alt=\"O editor Nano com o arquivo known_hosts aberto.\" width=\"1000\" height=\"571\"><figcaption id=\"caption-attachment-102408\" class=\"wp-caption-text\">O editor Nano com o arquivo known_hosts aberto.<\/figcaption><\/figure>\n<p>Voc\u00ea deve apagar a chave causando o erro \u201cWarning: Remote Host Identification Has Changed\u201d, ent\u00e3o salve suas altera\u00e7\u00f5es.<\/p>\n<p>Voc\u00ea tamb\u00e9m pode querer apagar todo o arquivo <strong>known_hosts<\/strong>, especialmente se voc\u00ea usar o SSH apenas para um ou dois sites. Para fazer isso, voc\u00ea pode rodar <code>rm .ssh\/known_hosts<\/code> em uma janela do Terminal.<\/p>\n<p>H\u00e1 mais um m\u00e9todo para alterar o arquivo <strong>known_hosts<\/strong> no Mac: usando o utilit\u00e1rio <strong>ssh-keygen<\/strong> a partir da linha de comando. Isto \u00e9 \u00f3timo se voc\u00ea n\u00e3o quiser escavar no arquivo em si, ou se voc\u00ea quiser trabalhar com apenas um site ou chave.<\/p>\n<p>Para conseguir isso, abra uma janela do Terminal e execute <code>ssh-keygen<\/code>, seguido pelo nome da m\u00e1quina do seu servidor. Por exemplo:<\/p>\n<pre><code class=\"language-bash\">ssh-keygen -R server.example.com<\/code><\/pre>\n<p>Isto n\u00e3o lhe perguntar\u00e1 se voc\u00ea quer apagar as linhas especificadas, ent\u00e3o certifique-se de que voc\u00ea est\u00e1 removendo as linhas certas antes de prosseguir:<\/p>\n<figure id=\"attachment_102413\" aria-describedby=\"caption-attachment-102413\" style=\"width: 1000px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-102413 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/08\/ssh-keygen-delete.png\" alt=\"Usando ssh-keygen para apagar do arquivo known_hosts.\" width=\"1000\" height=\"571\"><figcaption id=\"caption-attachment-102413\" class=\"wp-caption-text\">Usando ssh-keygen para apagar do arquivo known_hosts.<\/figcaption><\/figure>\n<p>Uma vez feito isso, voc\u00ea n\u00e3o deve receber o erro \u201cWarning: Remote Host Identification Has Changed\u201d.<\/p>\n\n<h2>Resumo<\/h2>\n<p>Seguran\u00e7a Web n\u00e3o se trata apenas de <a href=\"https:\/\/kinqsta.com\/pt\/blog\/como-instalar-plugins-no-wordpress\/\" rel=\"noopener\">instalar plugins<\/a> e criar uma senha forte. As conex\u00f5es que voc\u00ea usa para entrar nos servidores precisam de sua m\u00e1xima aten\u00e7\u00e3o. Se voc\u00ea n\u00e3o quer estar sujeito a um ataque machine-in-the-middle, voc\u00ea vai querer usar o acesso SSH quando voc\u00ea entrar no sistema.<\/p>\n<p>No entanto, o sistema funciona quase bem <em>demais<\/em>. Voc\u00ea pode receber o erro &#8220;Warning: Remote host identification has changed&#8221; por alguns motivos, e alguns s\u00e3o inocentes.<\/p>\n<p>Independentemente disso, voc\u00ea pode corrigir o erro rapidamente atrav\u00e9s de um prompt de comando ou terminal, usando alguns comandos.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uma conex\u00e3o segura com a internet n\u00e3o \u00e9 apenas o ideal &#8211; \u00e9 essencial. Na verdade, n\u00f3s vamos ao ponto de dizer que \u00e9 a prioridade &#8230;<\/p>\n","protected":false},"author":117,"featured_media":45342,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[],"topic":[1021],"class_list":["post-45338","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","topic-erros-site"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Como consertar o Erro &quot;Alerta: Identifica\u00e7\u00e3o Remota do Host Mudou&quot;<\/title>\n<meta name=\"description\" content=\"O erro &quot;Alerta: Identifica\u00e7\u00e3o Remota do Host Mudou&quot; protege sua conex\u00e3o de certos ataques maliciosos. 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