- Restrict management and monitoring protocols to the monitoring network.
- Replace community strings and default credentials.
- Send logs over TLS.
Port 3427: WebSphere SNMP
Port 3427 is assigned by IANA to websphere-snmp (WebSphere SNMP).
3427
How websphere-snmp works
Monitoring & loggingThe 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
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:
IANA registry entries for port 3427
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| websphere-snmp | 3427 | TCP, UDP | WebSphere SNMP | - | 2002-02 |
// source: IANA service name and port number registry
Which program uses port 3427, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3427' # process listening on 3427
sudo lsof -nP -i :3427macOS
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
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.
Other monitoring & logging ports
: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