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// Other services

Port 2928: REDSTONE-CPSS

Port 2928 is assigned by IANA to redstone-cpss (REDSTONE-CPSS).

2928

How redstone-cpss works

Other services
client:2928redstone-cpssresponse client:2928redstone-cpssresponse

The client sends a request to port 2928 and the redstone-cpss 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 2928 dangerous?

We have no specific security note for port 2928. 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 2928

ServicePortTransportDescriptionReferenceUpdated
redstone-cpss 2928 TCP, UDP REDSTONE-CPSS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2928, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2928'      # process listening on 2928
sudo lsof -nP -i :2928

macOS

sudo lsof -nP -i :2928

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2928 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2928
netstat -ano | findstr :2928

From another machine

nmap -p 2928 -sV <host>
sudo nmap -sU -p 2928 <host>
nc -zv <host> 2928

Block it in the firewall

sudo ufw deny 2928/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2928" -Direction Inbound -LocalPort 2928 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2928 used for?

Port 2928 is assigned by IANA to redstone-cpss (REDSTONE-CPSS).

Is port 2928 TCP or UDP?

Port 2928 is registered for TCP and UDP.

Is it safe to open port 2928?

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 2928 is open?

On Linux run "ss -ltnup 'sport = :2928'", on macOS "lsof -nP -i :2928", and on Windows "netstat -ano | findstr :2928" to see the local process. From another machine, "nmap -p 2928 <host>" shows whether it is reachable.

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