Port 49 — TACACS+
Quick reference for TCP/UDP port 49, used by TACACS+. Includes what the service does, security guidance and related ports.
Port
49
Protocol
TCP/UDP
Service
TACACS+
What is port 49?
Authentication protocol used by enterprise routers.
What port does TACACS+ use?
TACACS+ listens on port 49 by default.
Security guidance
Medium risk — open with care
Port 49 (TACACS+) can safely face the internet if you keep the software up to date, restrict admin endpoints, and use TLS where possible. Audit who can reach it and watch your logs.
Frequently asked
What is port 49 used for?+
Port 49 is the standard TCP/UDP port for TACACS+. Authentication protocol used by enterprise routers.
What port does TACACS+ use?+
TACACS+ listens on port 49 by default.
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