Linux PAM (Pluggable Authentication Modules) is a widely used and standardized authentication mechanism in Linux-based operating systems. PAM is responsible for authenticating users and granting access to the system's resources. It works by configuring authentication modules that provide different types of authentication methods, such as passwords, smart cards, and biometrics.
Proxmox VE also uses PAM for user authentication, but it also includes its own authentication server that provides additional functionality. The Proxmox VE authentication server allows for central management of user accounts, permissions, and roles across multiple Proxmox VE hosts. This makes it easier to manage user access and permissions, especially in larger environments.
Furthermore, the Proxmox VE authentication server supports two-factor authentication methods, such as Google Authenticator or YubiKey, which provide an additional layer of security. The server also includes a REST API, which can be used to automate user management tasks.
Overall, while Linux PAM is a standard authentication mechanism that is widely used and supported, the Proxmox VE authentication server provides additional functionality that can simplify user management and enhance security.z