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Dev.to
6/28/2026
Automate SSH 2FA Hardening with Google Authenticator

Automate SSH 2FA Hardening with Google Authenticator

Short summary

SSH 2FA via Google Authenticator is critical for security but typically requires manual configuration on each server, leading to misconfigurations and inconsistency. This guide automates deployment using PAM modules, SSH daemon configuration, and Ansible playbooks to scale 2FA across infrastructure. Learn installation, configuration best practices, user secret generation, troubleshooting, and rollback strategies.

  • •Manual SSH 2FA setup across servers is error-prone and inconsistent
  • •Automate with pam_google_authenticator, SSH config changes, and Ansible playbooks
  • •Includes installation, user management, and troubleshooting for production rollout

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