Port 1813 — RADIUS accounting
Quick reference for TCP/UDP port 1813, used by RADIUS accounting. Includes what the service does, security guidance and related ports.
Port
1813
Protocol
UDP
Service
RADIUS accounting
What is port 1813?
RADIUS accounting.
What port does RADIUS accounting use?
RADIUS accounting listens on port 1813 by default.
Security guidance
Medium risk — open with care
Port 1813 (RADIUS accounting) 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.
Related ports
Frequently asked
What is port 1813 used for?+
Port 1813 is the standard TCP/UDP port for RADIUS accounting. RADIUS accounting.
What port does RADIUS accounting use?+
RADIUS accounting listens on port 1813 by default.
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