This architecture simplifies secure administration access to Unix-like servers using a scalable, secure, and consistent experience both on-premises and in public clouds. It uses SSH certificates and HashiCorp Vault to manage SSH key authentication, providing short-lived SSH certificates that minimize the impact of leaked credentials. The solution also allows for granular access control based on user roles, functions, or teams, with minimal changes required on the host side. Additionally, it provides a flexible architecture that can be used across any cloud and on-premises environments, making it suitable for large-scale SSH access management.