750
Kerberos v4
Critical RiskUDP — 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 Superseded by Kerberos v5 on port 88.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.