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 Risiko

TCP — System & Infrastructure

Ikhtisar Port

Nomor Port 5666

Nama Layanan NRPE (Nagios Remote Plugin Executor)

Protokol Transport TCP

Kategori System & Infrastructure

Risiko Keamanan Medium

Rentang Port Terdaftar (1024-49151)

Apa itu Port 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 Umum Digunakan

Pertimbangan Keamanan

Port 5666 (NRPE (Nagios Remote Plugin Executor)) diklasifikasikan sebagai risiko sedang. Meskipun layanan ini umumnya diekspos, pertimbangkan untuk menggunakan alternatif terenkripsi jika tersedia.

Rekomendasi: Jaga layanan tetap diperbarui. Pantau log untuk aktivitas yang tidak biasa.

Port Terkait — System & Infrastructure

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

Istilah Terkait

Bandwidth Latency Packet Loss Ping Throughput ASN