Dictionary · Protocols and Ports
TACACS+
TACACS+ — Terminal Access Controller Access-Control System Plus
Identity · Advanced
A TCP protocol, commonly on port 49, that separates authentication, authorization, and accounting for device administration. The entire body can be encrypted.
Network teams use it so every administrator logs in to routers with a personal account. The central server can say exactly which commands that person may run.
Example: A router forwards an administrator's login to a central server on TCP 49 and records the commands the policy allows.
Ports
- TCP 49 — Device administration
Common misconception
- It is not the same protocol as the common network-access authentication service. This one is aimed at administering the devices themselves.