{# ================================================================ HEADER ================================================================ #}
IPFYI
{# ================================================================ MAIN CONTENT ================================================================ #}
750

Kerberos v4

Critical Risk

UDP — Security & VPN

Port Overview

Port Number 750
Service Name Kerberos v4
Transport Protocol UDP
Category Security & VPN
Security Risk Critical
Port Range Well-Known (0-1023)

What is Port 750?

Kerberos version 4 authentication service. Has known cryptographic weaknesses including DES-only encryption. Superseded by Kerberos v5 on port 88. Should be disabled.

UDP Security & VPN

Security Considerations

Port 750 (Kerberos v4) is classified as critical risk. This port should not be exposed to the public internet. The service transmits data without encryption, making it vulnerable to eavesdropping, credential theft, and man-in-the-middle attacks.

Recommendation: Block this port at the firewall. Use encrypted alternatives (SSH, SFTP, HTTPS) instead.

Related Ports — Security & VPN

49 TACACS 65 TACACS-DS 88 Kerberos 90 DNSIX Security 370 codaauth2 389 LDAP 464 Kerberos Change Password 500 IKE/ISAKMP
{# ================================================================ FOOTER ================================================================ #} {# ================================================================ TOAST NOTIFICATIONS ================================================================ #}
{# ================================================================ SCRIPTS ================================================================ #}