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// Web

Port 11165: sun cacao web service access point

Port 11165 is assigned by IANA to suncacao-websvc (sun cacao web service access point).

11165

How suncacao-websvc works

Web
browser:11165suncacao-websvc browser:11165suncacao-websvc

A browser sends an HTTP request to port 11165 and the suncacao-websvc server sends the page back.

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
Web
01 Security

Is port 11165 dangerous?

We have no specific security note for port 11165. Its risk depends on the program actually listening on it. General advice for web services:

  • Serve it over HTTPS only and check the HTTP security headers.
  • Keep admin consoles and development servers off the Internet.
  • Patch the application server and remove default credentials and sample apps.
02 Registry

IANA registry entries for port 11165

ServicePortTransportDescriptionReferenceUpdated
suncacao-websvc 11165 TCP, UDP sun cacao web service access point - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 11165, and is it reachable?

Linux

sudo ss -ltnup 'sport = :11165'      # process listening on 11165
sudo lsof -nP -i :11165

macOS

sudo lsof -nP -i :11165

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 11165 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 11165
netstat -ano | findstr :11165

From another machine

nmap -p 11165 -sV <host>
sudo nmap -sU -p 11165 <host>
nc -zv <host> 11165

Block it in the firewall

sudo ufw deny 11165/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 11165" -Direction Inbound -LocalPort 11165 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 11165 used for?

Port 11165 is assigned by IANA to suncacao-websvc (sun cacao web service access point).

Is port 11165 TCP or UDP?

Port 11165 is registered for TCP and UDP.

Is it safe to open port 11165?

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. Serve it over HTTPS only and check the HTTP security headers.

How do I check if port 11165 is open?

On Linux run "ss -ltnup 'sport = :11165'", on macOS "lsof -nP -i :11165", and on Windows "netstat -ano | findstr :11165" to see the local process. From another machine, "nmap -p 11165 <host>" shows whether it is reachable.

05 Related
:443 HTTPS tcp · udp · sctp · low risk :80 HTTP tcp · udp · sctp · moderate risk :8080 HTTP alternate tcp · udp · high risk :8443 HTTPS alternate tcp · udp · moderate risk :3000 Dev servers / Grafana tcp · udp · moderate risk :5000 Flask / Docker registry / UPnP tcp · udp · moderate risk :8000 HTTP alternate (dev) tcp · udp · moderate risk :8888 Jupyter / HTTP alternate tcp · udp · high risk

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