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 Risk

UDP — Security & VPN

Port Genel Bakış

Port Numarası 1646

Servis Adı RADIUS Accounting (old)

Taşıma Protokolü UDP

Kategori Security & VPN

Güvenlik Riski Low

Port Aralığı Kayıtlı (1024-49151)

Port Nedir 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

Güvenlik Değerlendirmeleri

1646 numaralı port (RADIUS Accounting (old)) düşük risk olarak sınıflandırılmıştır. Bu hizmet şifreleme kullanmakta veya minimal bir saldırı yüzeyine sahip olup açılması görece güvenlidir.

Öneri: Standart güvenlik uygulamaları geçerlidir. Yazılımı güncel tutun ve erişimi izleyin.

İlgili Portlar — Security & VPN

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

İlgili Terimler

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS