Is port 63 (Whois++) dangerous?

Port 63 is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose with standard security practices.

Should port 63 be open on my firewall?

Port 63 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 63 use?

Port 63 (Whois++) uses the TCP transport protocol and falls under the Other category.

:63 (TCP)

Whois++

Low Riesgo

TCP — Other

Resumen del puerto

Número de puerto 63

Nombre del servicio Whois++

Protocolo de transporte TCP

Categoría Other

Riesgo de seguridad Low

Rango de puertos Conocidos (0-1023)

Qué es el puerto 63?

Whois++ was an extended version of the WHOIS protocol designed to provide richer directory queries across distributed databases. It was standardized in RFC 1834 and RFC 1835 as an improvement over the basic WHOIS on port 43. The service never gained widespread adoption and is considered obsolete today.

TCP Other

Consideraciones de seguridad

El puerto 63 (Whois++) está clasificado como bajo riesgo. Este servicio usa cifrado o tiene una superficie de ataque mínima, siendo relativamente seguro de exponer.

Recomendación: Aplica prácticas de seguridad estándar. Mantén el software actualizado y monitorea el acceso.

Puertos relacionados — Other

35 Private Printer Server 43 WHOIS 75 Private Dial-Out Service 78 VetTCP 91 MIT-DOV 92 NPP 104 DICOM 105 CCSO Nameserver

Términos relacionados

ASN BGP Hijack Data Center Domain Name Dual Stack Internet Exchange Point (IXP)