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 Risco

UDP — Security & VPN

Visão geral da porta

Número de porta 1646

Nome do serviço RADIUS Accounting (old)

Protocolo de transporte UDP

Categoria Security & VPN

Risco de segurança Low

Intervalo de portas Registradas (1024-49151)

O que é a porta 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

Considerações de segurança

A porta 1646 (RADIUS Accounting (old)) é classificada como baixo risco. Este serviço usa criptografia ou tem uma superfície de ataque mínima, tornando-o relativamente seguro para expor.

Recomendação: Aplique práticas de segurança padrão. Mantenha o software atualizado e monitore o acesso.

Portas relacionadas — Security & VPN

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

Termos relacionados

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS