Is port 5666 (NRPE (Nagios Remote Plugin Executor)) dangerous?

Port 5666 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 5666 be open on my firewall?

Port 5666 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 5666 use?

Port 5666 (NRPE (Nagios Remote Plugin Executor)) uses the TCP transport protocol and falls under the System & Infrastructure category.

:5666 (TCP)

NRPE (Nagios Remote Plugin Executor)

Medium Riesgo

TCP — System & Infrastructure

Resumen del puerto

Número de puerto 5666

Nombre del servicio NRPE (Nagios Remote Plugin Executor)

Protocolo de transporte TCP

Categoría System & Infrastructure

Riesgo de seguridad Medium

Rango de puertos Registrados (1024-49151)

Qué es el puerto 5666?

Port 5666 is used by NRPE (Nagios Remote Plugin Executor), an agent that allows Nagios and compatible monitoring systems to execute monitoring plugins on remote Linux/Unix hosts. Nagios checks server health metrics like CPU, memory, and disk usage through NRPE. Misconfigured NRPE allowing command arguments can be exploited for remote command execution.

TCP System & Infrastructure De uso común

Consideraciones de seguridad

El puerto 5666 (NRPE (Nagios Remote Plugin Executor)) está clasificado como riesgo medio. Aunque este servicio se expone comúnmente, considera usar alternativas cifradas cuando estén disponibles.

Recomendación: Mantén el servicio actualizado. Monitorea los registros en busca de actividad inusual.

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