Subdomínio para um porto TCP/IP

Uma das serventias do proxy Apache é poder redirecionar as requisições feitas a um subdomínio para um servidor rodando em um porto diferente ou em um endereço diferente ou uma mistura de ambos. Assim sendo, uma solicitação a db.exemplo.com poderia ser redirecionada para o porto 27017 localizada no mesmo servidor por meio dos seguintes passos: […]


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Posted in Servidores

Oracle XE 10.2g e PHP 5.6 sobre Ubuntu 20 (Segundo Round)

Continuando a saga, o meu cliente precisou que o sistema dele funcionasse com pdo_oci. Isso fez com que fosse necessário instalar algumas coisas e compilar o módulo do php. Tudo o aqui feito precisa de ser super-usuário, então a primeira coisa é fazer login como root: sudo su – Fiz uma pasta para que fique […]


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Posted in Desenvolvimento, Servidores

Oracle XE 10.2g e PHP 5.6 sobre Ubuntu 20

Recentemente me solicitaram colaborar em um problema de conexão entre OracleXE 10.2g e PHP 5.6 Por serem duas plataformas antigas, precisei montar meus servidores para emular tal situação. Como na descrição não veio se era Apache ou Nginx e o comum era usar o Apache2 e me indicaram estar rodando em Ubuntu20, optei por Apache2. […]


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Posted in Desenvolvimento, Servidores

Uma forma de ajustar o MTU

MTU significa Max Transmission Unit e determina o tamanho máximo que um pacote de dados pode ter. Um tamanho grande de MTU, está associado a uma redução no overhead ao passo que um tamanho pequeno de MTU pode reduzir a demora de resposta da rede. Esse tamanho não é o mesmo para todos os provedores […]


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Posted in Servidores

Criando um ambiente de desenvolvimento LAMP

LAMP é um acrônimo representando Linux, Apache, MySQL e PHP Um ambiente LAMP nos dá os elementos básicos para poder programar. Como o alvo é programar sobre um servidor e não sobre ambiente Desktop, a instalação será sem GUI mas fique livre para faze-lo. Eu mesmo não tenho recursos tão abundantes assim para pôr interface […]


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Posted in Desenvolvimento, Servidores

Acessando o terminal das VM Linux no KVM


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Tenho algumas VMs virtualizadas com KVM Às vezes preciso acessa-las e ver o boot delas ou corrigir uma placa de rede virtual ou coisa assim mas a interface gráfica fica pesada por estar longe ou sobre uma internet pobre. O melhor nesses casos, é fazer um ssh no hospedeiro e dai entrar pelo console na […]


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Posted in Servidores

Sincronizando os relógios nas VMs

Obvio que virtualizo.. há anos. As primeiras com XEN (leia-se Zen). No escritório temos um servidor usando KVM e outro com OpenVZ Nos clientes, estamos usando também estruturas mistas e muitas das máquinas virtuais são CentOS 6 ou 7 Com este último lance de que não sabemos mais em que hora vivemos (vai ver é […]


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Posted in Servidores

Migrando HyperV para KVM

É obvio que qualquer um que me conheça vai saber de como valorizo o KVM e tudo o que for software livre (Aliás, qualquer coisa que seja livre) Estes dias me veio o problema de migrar uma máquina que estava em uma HyperV para o KVM. O problema se resume ao seguinte lance: Transformar a imagem […]


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Posted in Servidores

CentOS 6.9 com PHP7.2 e Curl atualizado

Nosso sistema de gestão de pequenas clínicas utiliza um controle distribuído de nós para manter a sequencialidade do prontuário e a integridade dos dados entre outras coisas. Uma das exigências desse imbróglio todo é que rode sobre SSL. Por razões de testes de compatibilidade, mantemos CentOS 6.9 em alguns servidores ao passo que outros já […]


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Posted in ServidoresTagged , ,

Bloqueando ADS com o OPNSense

Sim! Confessarei! Sou fã de BSD, software livre e tudo o que incentive a liberdade e a autodeterminação. Bom, o lance é que use OPNSense em algumas redes e preciso bloquear – de forma centralizada – o tráfego para determinados sites, em especial os de propaganda e mineração. Sem explicar os pormenores, todo santo dia meu […]


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Posted in Servidores