Is port 464 (Kerberos Change Password) dangerous?

Port 464 is classified as critical risk and should not be exposed to the public internet. It transmits data without encryption, making it vulnerable to eavesdropping and credential theft.

Should port 464 be open on my firewall?

No, port 464 should not be open to the public internet. Block it at the firewall and use encrypted alternatives such as SSH, SFTP, or HTTPS instead.

What transport protocol does port 464 use?

Port 464 (Kerberos Change Password) uses the TCP/UDP transport protocol and falls under the Security & VPN category.

:464 (TCP/UDP)

Kerberos Change Password

Critical Risk

TCP/UDP — Security & VPN

Port Overview

Port Number 464

Service Name Kerberos Change Password

Transport Protocol TCP/UDP

Category Security & VPN

Security Risk Critical

Port Range Well-Known (0-1023)

What is Port 464?

Port 464 is assigned to kpasswd, used for changing Kerberos passwords in Active Directory and MIT Kerberos environments. Critical for enterprise auth.

TCP/UDP Security & VPN Commonly Used

Security Considerations

Port 464 (Kerberos Change Password) 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

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

Related Terms

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS