Is port 1645 (RADIUS Authentication (old)) dangerous?

Port 1645 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 1645 be open on my firewall?

Port 1645 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 1645 use?

Port 1645 (RADIUS Authentication (old)) uses the UDP transport protocol and falls under the Security & VPN category.

:1645 (UDP)

RADIUS Authentication (old)

Medium Risk

UDP — Security & VPN

Port Genel Bakış

Port Numarası 1645

Servis Adı RADIUS Authentication (old)

Taşıma Protokolü UDP

Kategori Security & VPN

Güvenlik Riski Medium

Port Aralığı Kayıtlı (1024-49151)

Port Nedir 1645?

Port 1645 is an older, unofficial RADIUS authentication port used before the IANA officially assigned port 1812. Some legacy network devices and AAA servers still use this port for authentication. Network engineers managing older infrastructure may need to support both ports 1645 and 1812 simultaneously.

UDP Security & VPN

Güvenlik Değerlendirmeleri

1645 numaralı port (RADIUS Authentication (old)) orta risk olarak sınıflandırılmıştır. Bu hizmet yaygın olarak açık tutulsa da mevcut olduğunda şifreli alternatifleri kullanmayı düşünün.

Öneri: Hizmeti güncel tutun. Olağandışı etkinlikler için günlükleri 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