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content/posts/ssh-2fa-totp.md

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+---
+title: Двухфакторная аутентификация для SSH
+description: 2fa, totp, google-authenticator
+date: 2022-11-29T13:35:00+05:00
+tags: [linux, ssh]
+---
+## Установка пакета
+```shell
+apt install -y openssh-server libpam-google-authenticator
+```
+
+## Правка конфига PAM
+```shell
+auth required pam_google_authenticator.so
+
+# auth required pam_google_authenticator.so
+```
+
+## Правка конфига ssh
+```shell
+ChallengeResponseAuthentication yes
+
+# /etc/ssh/sshd_config
+```
+
+## Конфигурация аутентификации
+Следующая команда сконфигурирует TOTP.
+Запускать команду следует от имени того пользователя, 
+к которому будет инициализированно подключение.
+```shell
+google-authenticator
+```
+
+## Управление факторами (необязательно)
+Включить запрос ключа при аутентификации:
+```shell
+AuthenticationMethods publickey,password publickey,keyboard-interactive
+
+# /etc/ssh/sshd_config
+```
+
+Отключить запрос пароля при аутентификации:
+```shell
+#@include common-auth
+
+# /etc/pam.d/sshd
+```
+
+## Перезапуск сервиса ssh
+```shell
+systemctl restart ssh
+```