2FA / MFA(Two-Factor / Multi-Factor Authentication)
Requiring more than just a password to log in — typically something you know plus something you have.
A second factor (a TOTP code, hardware key, or push approval) means a leaked password alone can't grant access. Enable 2FA on everything exposed to the internet, especially your reverse proxy, VPN and admin panels.
Related articles
TOTP(Time-based One-Time Password)
A six-to-eight digit code that changes every 30 seconds, used as a second authentication factor.
SSO(Single Sign-On)
Logging in once with a central identity provider to access many separate applications.
Firewall
Software or hardware that controls which network traffic is allowed in or out based on rules.