Is port 1646 (RADIUS Accounting (old)) dangerous?

Port 1646 is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose with standard security practices.

Should port 1646 be open on my firewall?

Port 1646 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 1646 use?

Port 1646 (RADIUS Accounting (old)) uses the UDP transport protocol and falls under the Security & VPN category.

:1646 (UDP)

RADIUS Accounting (old)

Low Riesgo

UDP — Security & VPN

Resumen del puerto

Número de puerto 1646

Nombre del servicio RADIUS Accounting (old)

Protocolo de transporte UDP

Categoría Security & VPN

Riesgo de seguridad Low

Rango de puertos Registrados (1024-49151)

Qué es el puerto 1646?

Port 1646 is the legacy RADIUS accounting port, used before IANA standardized port 1813 for RADIUS accounting. It records network access session information such as duration, bytes transferred, and user identity. Many older RADIUS servers and network devices still support this port.

UDP Security & VPN

Consideraciones de seguridad

El puerto 1646 (RADIUS Accounting (old)) está clasificado como bajo riesgo. Este servicio usa cifrado o tiene una superficie de ataque mínima, siendo relativamente seguro de exponer.

Recomendación: Aplica prácticas de seguridad estándar. Mantén el software actualizado y monitorea el acceso.

Puertos relacionados — Security & VPN

31 MSG-AUTH 48 Auditd 49 TACACS 56 XNS-AUTH 62 ACA Services 65 TACACS-DS 88 Kerberos 90 DNSIX Security

Términos relacionados

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS