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// Other services

Port 33123: Aurora (Balaena Ltd)

Port 33123 is assigned by IANA to aurora-balaena (Aurora (Balaena Ltd)).

33123

How aurora-balaena works

Other services
client:33123aurora-balaenaresponse client:33123aurora-balaenaresponse

The client sends a request to port 33123 and the aurora-balaena service answers.

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
Other services
01 Security

Is port 33123 dangerous?

We have no specific security note for port 33123. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 33123

ServicePortTransportDescriptionReferenceUpdated
aurora-balaena 33123 TCP, UDP Aurora (Balaena Ltd) - 2008-02-14

// source: IANA service name and port number registry

03 Check it

Which program uses port 33123, and is it reachable?

Linux

sudo ss -ltnup 'sport = :33123'      # process listening on 33123
sudo lsof -nP -i :33123

macOS

sudo lsof -nP -i :33123

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 33123 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 33123
netstat -ano | findstr :33123

From another machine

nmap -p 33123 -sV <host>
sudo nmap -sU -p 33123 <host>
nc -zv <host> 33123

Block it in the firewall

sudo ufw deny 33123/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 33123" -Direction Inbound -LocalPort 33123 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 33123 used for?

Port 33123 is assigned by IANA to aurora-balaena (Aurora (Balaena Ltd)).

Is port 33123 TCP or UDP?

Port 33123 is registered for TCP and UDP.

Is it safe to open port 33123?

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. Close the port if nothing on the host needs it.

How do I check if port 33123 is open?

On Linux run "ss -ltnup 'sport = :33123'", on macOS "lsof -nP -i :33123", and on Windows "netstat -ano | findstr :33123" to see the local process. From another machine, "nmap -p 33123 <host>" shows whether it is reachable.

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