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// Monitoring & logging

Port 609: npmp-trap

Port 609 is assigned by IANA to npmp-trap (npmp-trap).

609

How npmp-trap works

Monitoring & logging
monitoringdevicenpmp-trap monitoringdevicenpmp-trap

The monitoring server collects metrics, alerts or logs from devices over port 609.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Well-known (0-1023)
Category
Monitoring & logging
01 Security

Is port 609 dangerous?

We have no specific security note for port 609. Its risk depends on the program actually listening on it. General advice for monitoring & logging services:

  • Restrict management and monitoring protocols to the monitoring network.
  • Replace community strings and default credentials.
  • Send logs over TLS.
02 Registry

IANA registry entries for port 609

ServicePortTransportDescriptionReferenceUpdated
npmp-trap 609 TCP, UDP npmp-trap - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 609, and is it reachable?

Linux

sudo ss -ltnup 'sport = :609'      # process listening on 609
sudo lsof -nP -i :609

macOS

sudo lsof -nP -i :609

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 609 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 609
netstat -ano | findstr :609

From another machine

nmap -p 609 -sV <host>
sudo nmap -sU -p 609 <host>
nc -zv <host> 609

Block it in the firewall

sudo ufw deny 609/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 609" -Direction Inbound -LocalPort 609 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 609 used for?

Port 609 is assigned by IANA to npmp-trap (npmp-trap).

Is port 609 TCP or UDP?

Port 609 is registered for TCP and UDP.

Is it safe to open port 609?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Restrict management and monitoring protocols to the monitoring network.

How do I check if port 609 is open?

On Linux run "ss -ltnup 'sport = :609'", on macOS "lsof -nP -i :609", and on Windows "netstat -ano | findstr :609" to see the local process. From another machine, "nmap -p 609 <host>" shows whether it is reachable.

05 Related
:161 SNMP udp · tcp · high risk :162 SNMP trap udp · tcp · moderate risk :9090 Prometheus / admin consoles tcp · udp · high risk :514 Syslog udp · tcp · moderate risk :6514 Syslog over TLS tcp · udp · dccp · low risk :5601 Kibana tcp · udp · high risk :391 SynOptics SNMP Relay Port tcp · udp :412 Trap Convention Port tcp · udp

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