CyberHunter
Local dataset, no network
// Other services

Port 4054: CosmoCall Universe Communications Port 2

Port 4054 is assigned by IANA to ccu-comm-2 (CosmoCall Universe Communications Port 2).

4054

How ccu-comm-2 works

Other services
client:4054ccu-comm-2response client:4054ccu-comm-2response

The client sends a request to port 4054 and the ccu-comm-2 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 4054 dangerous?

We have no specific security note for port 4054. 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 4054

ServicePortTransportDescriptionReferenceUpdated
ccu-comm-2 4054 TCP, UDP CosmoCall Universe Communications Port 2 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4054, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4054'      # process listening on 4054
sudo lsof -nP -i :4054

macOS

sudo lsof -nP -i :4054

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4054 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4054
netstat -ano | findstr :4054

From another machine

nmap -p 4054 -sV <host>
sudo nmap -sU -p 4054 <host>
nc -zv <host> 4054

Block it in the firewall

sudo ufw deny 4054/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4054" -Direction Inbound -LocalPort 4054 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4054 used for?

Port 4054 is assigned by IANA to ccu-comm-2 (CosmoCall Universe Communications Port 2).

Is port 4054 TCP or UDP?

Port 4054 is registered for TCP and UDP.

Is it safe to open port 4054?

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 4054 is open?

On Linux run "ss -ltnup 'sport = :4054'", on macOS "lsof -nP -i :4054", and on Windows "netstat -ano | findstr :4054" to see the local process. From another machine, "nmap -p 4054 <host>" shows whether it is reachable.

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