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// Other services

Port 2223: Rockwell CSP2

Port 2223 is assigned by IANA to rockwell-csp2 (Rockwell CSP2).

2223

How rockwell-csp2 works

Other services
client:2223rockwell-csp2response client:2223rockwell-csp2response

The client sends a request to port 2223 and the rockwell-csp2 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 2223 dangerous?

We have no specific security note for port 2223. 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 2223

ServicePortTransportDescriptionReferenceUpdated
rockwell-csp2 2223 TCP, UDP Rockwell CSP2 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2223, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2223'      # process listening on 2223
sudo lsof -nP -i :2223

macOS

sudo lsof -nP -i :2223

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2223 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2223
netstat -ano | findstr :2223

From another machine

nmap -p 2223 -sV <host>
sudo nmap -sU -p 2223 <host>
nc -zv <host> 2223

Block it in the firewall

sudo ufw deny 2223/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2223" -Direction Inbound -LocalPort 2223 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2223 used for?

Port 2223 is assigned by IANA to rockwell-csp2 (Rockwell CSP2).

Is port 2223 TCP or UDP?

Port 2223 is registered for TCP and UDP.

Is it safe to open port 2223?

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 2223 is open?

On Linux run "ss -ltnup 'sport = :2223'", on macOS "lsof -nP -i :2223", and on Windows "netstat -ano | findstr :2223" to see the local process. From another machine, "nmap -p 2223 <host>" shows whether it is reachable.

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