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// Monitoring & logging

Port 11161: sun cacao snmp access point

Port 11161 is assigned by IANA to suncacao-snmp (sun cacao snmp access point).

11161

How suncacao-snmp works

Monitoring & logging
monitoringdevicesuncacao-snmp monitoringdevicesuncacao-snmp

The monitoring server collects metrics, alerts or logs from devices over port 11161.

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 11161 dangerous?

We have no specific security note for port 11161. 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 11161

ServicePortTransportDescriptionReferenceUpdated
suncacao-snmp 11161 TCP, UDP sun cacao snmp access point - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 11161, and is it reachable?

Linux

sudo ss -ltnup 'sport = :11161'      # process listening on 11161
sudo lsof -nP -i :11161

macOS

sudo lsof -nP -i :11161

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 11161 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 11161
netstat -ano | findstr :11161

From another machine

nmap -p 11161 -sV <host>
sudo nmap -sU -p 11161 <host>
nc -zv <host> 11161

Block it in the firewall

sudo ufw deny 11161/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 11161" -Direction Inbound -LocalPort 11161 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 11161 used for?

Port 11161 is assigned by IANA to suncacao-snmp (sun cacao snmp access point).

Is port 11161 TCP or UDP?

Port 11161 is registered for TCP and UDP.

Is it safe to open port 11161?

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 11161 is open?

On Linux run "ss -ltnup 'sport = :11161'", on macOS "lsof -nP -i :11161", and on Windows "netstat -ano | findstr :11161" to see the local process. From another machine, "nmap -p 11161 <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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