1813
RADIUS Accounting
Low RiskUDP — Security & VPN
Port Overview
Port Number
1813
Service Name
RADIUS Accounting
Transport Protocol
UDP
Category
Security & VPN
Security Risk
Low
Port Range
Registered (1024-49151)
What is Port 1813?
Port 1813 is the official IANA-assigned port for RADIUS accounting. It collects session data including start/stop times, bytes transferred, and user identity for billing and auditing purposes. Network access servers send accounting records to the RADIUS server on this port.
UDP
Security & VPN
Commonly Used
Security Considerations
Port 1813 (RADIUS Accounting) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.