{"id":101359,"date":"2021-09-21T22:22:43","date_gmt":"2021-09-21T20:22:43","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predstavlen-modul-yadra-sposobnyj-v-razy-uskorit-openvpn"},"modified":"2021-09-21T22:22:43","modified_gmt":"2021-09-21T20:22:43","slug":"predstavlen-modul-yadra-sposobnyj-v-razy-uskorit-openvpn","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/predstavlen-modul-yadra-sposobnyj-v-razy-uskorit-openvpn","title":{"rendered":"Apresentado m\u00f3dulo de kernel capaz de acelerar em grande medida o OpenVPN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Os desenvolvedores do pacote para criar redes privadas virtuais OpenVPN apresentaram o m\u00f3dulo do kernel ovpn-dco, que permite acelerar significativamente o desempenho da VPN. Embora o m\u00f3dulo ainda esteja em desenvolvimento e foque apenas na branch linux-next, seu status experimental j\u00e1 alcan\u00e7ou um n\u00edvel de estabilidade que permitiu sua utiliza\u00e7\u00e3o para garantir a opera\u00e7\u00e3o do servi\u00e7o OpenVPN Cloud. <\/p>\n

Comparado \u00e0 configura\u00e7\u00e3o baseada na interface tun, a aplica\u00e7\u00e3o do m\u00f3dulo do lado do cliente e do servidor, ao usar a criptografia AES-256-GCM, resultou em um aumento de 8 vezes na largura de banda (de 370 Mbit\/s para 2950 Mbit\/s). Ao utilizar o m\u00f3dulo apenas no lado do cliente, a largura de banda aumentou tr\u00eas vezes para o tr\u00e1fego de sa\u00edda e permaneceu inalterada para o tr\u00e1fego de entrada. servidor<\/a> A largura de banda aumentou em 4 vezes para o tr\u00e1fego de entrada e em 35% para o tr\u00e1fego de sa\u00edda.

\"Apresentado<\/center> <\/p>\n

A acelera\u00e7\u00e3o \u00e9 alcan\u00e7ada atrav\u00e9s da transfer\u00eancia de todas as opera\u00e7\u00f5es de criptografia, processamento de pacotes e gerenciamento do canal de comunica\u00e7\u00e3o para o n\u00facleo do Linux, o que elimina as sobrecarga associada \u00e0 troca de contexto, permitindo otimizar o desempenho por meio de acesso direto \u00e0s APIs internas do n\u00facleo e evitando a transfer\u00eancia lenta de dados entre o n\u00facleo e o espa\u00e7o do usu\u00e1rio (criptografia, descriptografia e roteamento s\u00e3o realizados pelo m\u00f3dulo sem enviar o tr\u00e1fego para o manipulador no espa\u00e7o do usu\u00e1rio). <\/p>\n

Observa-se que o impacto negativo no desempenho VPN<\/a> decorre principalmente de opera\u00e7\u00f5es de criptografia que demandam muitos recursos e de lat\u00eancias causadas pela troca de contexto. Para acelerar a criptografia, foram utilizados extens\u00f5es de processador, como o Intel AES-NI, mas as trocas de contexto antes da chegada do ovpn-dco continuavam sendo um gargalo. Al\u00e9m do uso de instru\u00e7\u00f5es fornecidas pelo processador para acelerar a criptografia, o m\u00f3dulo ovpn-dco tamb\u00e9m garante a divis\u00e3o das opera\u00e7\u00f5es de criptografia em segmentos separados e seu processamento em modo multithread, o que permite utilizar todos os n\u00facleos dispon\u00edveis da CPU. <\/p>\n

Das atuais limita\u00e7\u00f5es da implementa\u00e7\u00e3o, que ser\u00e3o corrigidas no futuro, destacam o suporte apenas aos modos AEAD e 'none' (sem autentica\u00e7\u00e3o) e aos cifradores AES-GCM e CHACHA20POLY1305. O suporte ao DCO est\u00e1 previsto para ser inclu\u00eddo na vers\u00e3o 2.6 do OpenVPN, programada para o 4\u00ba trimestre deste ano. Atualmente, o m\u00f3dulo \u00e9 suportado no cliente Linux do OpenVPN3 que est\u00e1 em testes beta e nas compila\u00e7\u00f5es experimentais do servidor OpenVPN para Linux. Um m\u00f3dulo semelhante, ovpn-dco-win, tamb\u00e9m est\u00e1 sendo desenvolvido para o n\u00facleo Windows.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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