Is port 65 (TACACS-DS) dangerous?

Port 65 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 65 be open on my firewall?

Port 65 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 65 use?

Port 65 (TACACS-DS) uses the TCP/UDP transport protocol and falls under the Security & VPN category.

:65 (TCP/UDP)

TACACS-DS

Medium Risk

TCP/UDP — Security & VPN

Port Overview

Port Number 65

Service Name TACACS-DS

Transport Protocol TCP/UDP

Category Security & VPN

Security Risk Medium

Port Range Well-Known (0-1023)

What is Port 65?

TACACS-DS (Terminal Access Controller Access Control System - Database Service) is a predecessor variant of TACACS used for centralized authentication of terminal access. It was used in early ARPANET environments to control access to network devices. It has been fully superseded by TACACS+ (port 49) and RADIUS.

TCP/UDP Security & VPN

Security Considerations

Port 65 (TACACS-DS) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.

Recommendation: Keep the service updated. Monitor logs for unusual activity.

Related Ports — Security & VPN

31 MSG-AUTH 48 Auditd 49 TACACS 56 XNS-AUTH 62 ACA Services 88 Kerberos 90 DNSIX Security 128 GSS-XLicen

Related Terms

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS