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// Monitoring & logging

Port 3427: WebSphere SNMP

Port 3427 is assigned by IANA to websphere-snmp (WebSphere SNMP).

3427

How websphere-snmp works

Monitoring & logging
monitoringdevicewebsphere-snmp monitoringdevicewebsphere-snmp

The monitoring server collects metrics, alerts or logs from devices over port 3427.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Monitoring & logging
01 Security

Is port 3427 dangerous?

We have no specific security note for port 3427. 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 3427

ServicePortTransportDescriptionReferenceUpdated
websphere-snmp 3427 TCP, UDP WebSphere SNMP - 2002-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 3427, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3427'      # process listening on 3427
sudo lsof -nP -i :3427

macOS

sudo lsof -nP -i :3427

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3427 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3427
netstat -ano | findstr :3427

From another machine

nmap -p 3427 -sV <host>
sudo nmap -sU -p 3427 <host>
nc -zv <host> 3427

Block it in the firewall

sudo ufw deny 3427/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3427" -Direction Inbound -LocalPort 3427 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3427 used for?

Port 3427 is assigned by IANA to websphere-snmp (WebSphere SNMP).

Is port 3427 TCP or UDP?

Port 3427 is registered for TCP and UDP.

Is it safe to open port 3427?

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 3427 is open?

On Linux run "ss -ltnup 'sport = :3427'", on macOS "lsof -nP -i :3427", and on Windows "netstat -ano | findstr :3427" to see the local process. From another machine, "nmap -p 3427 <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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