Is port 73 (NETRJS-3) dangerous?

Port 73 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 73 be open on my firewall?

Port 73 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 73 use?

Port 73 (NETRJS-3) uses the TCP/UDP transport protocol and falls under the System & Infrastructure category.

:73 (TCP/UDP)

NETRJS-3

Low Riesgo

TCP/UDP — System & Infrastructure

Resumen del puerto

Número de puerto 73

Nombre del servicio NETRJS-3

Protocolo de transporte TCP/UDP

Categoría System & Infrastructure

Riesgo de seguridad Low

Rango de puertos Conocidos (0-1023)

Qué es el puerto 73?

NETRJS-3 is the third variant port for the ARPANET Network Remote Job Service. Defined alongside ports 71, 72, and 74 in RFC 740, these ports represent the earliest form of remote computing over a network.

TCP/UDP System & Infrastructure

Consideraciones de seguridad

El puerto 73 (NETRJS-3) 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 — System & Infrastructure

0 Reserved 1 TCPMUX 2 Management Utility 3 CompressNET 4 Unassigned 5 RJE 6 Unassigned 7 Echo

Términos relacionados

Bandwidth Latency Packet Loss Ping Throughput ASN