Is port 751 (Kerberos Master) dangerous?

Port 751 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 751 be open on my firewall?

No, port 751 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 751 use?

Port 751 (Kerberos Master) uses the TCP/UDP transport protocol and falls under the Security & VPN category.

:751 (TCP/UDP)

Kerberos Master

Critical Riesgo

TCP/UDP — Security & VPN

Resumen del puerto

Número de puerto 751

Nombre del servicio Kerberos Master

Protocolo de transporte TCP/UDP

Categoría Security & VPN

Riesgo de seguridad Critical

Rango de puertos Conocidos (0-1023)

Qué es el puerto 751?

Kerberos v4 master database administration service. Relies on cryptographically broken DES encryption. Should be disabled in all environments.

TCP/UDP Security & VPN

Consideraciones de seguridad

El puerto 751 (Kerberos Master) está clasificado como riesgo crítico. Este puerto no debe exponerse a internet público. El servicio transmite datos sin cifrado, haciéndolo vulnerable a escuchas, robo de credenciales y ataques de intermediario.

Recomendación: Bloquea este puerto en el firewall. Utiliza alternativas cifradas (SSH, SFTP, HTTPS) en su lugar.

Puertos relacionados — Security & VPN

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

Términos relacionados

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS