TACACS+
TACACS+ is a Cisco-friendly AAA protocol for device administration with granular authorization.
Updated: 2026-03-06
Definition
TACACS+ is often used for network device admin authentication and command authorization.
It supports more granular control for admin actions compared to basic local accounts.
Key points
- AAA for device administration
- Granular command authorization
- Centralizes admin control
Common mistakes
- No fallback method if TACACS+ is down (lockout risk).
- Not enabling accounting logs for admin actions.
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