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// Other services

Port 2129: cs-live.com

Port 2129 is assigned by IANA to cs-live (cs-live.com).

2129

How cs-live works

Other services
client:2129cs-liveresponse client:2129cs-liveresponse

The client sends a request to port 2129 and the cs-live 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 2129 dangerous?

We have no specific security note for port 2129. 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 2129

ServicePortTransportDescriptionReferenceUpdated
cs-live 2129 TCP, UDP cs-live.com - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2129, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2129'      # process listening on 2129
sudo lsof -nP -i :2129

macOS

sudo lsof -nP -i :2129

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2129 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2129
netstat -ano | findstr :2129

From another machine

nmap -p 2129 -sV <host>
sudo nmap -sU -p 2129 <host>
nc -zv <host> 2129

Block it in the firewall

sudo ufw deny 2129/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2129" -Direction Inbound -LocalPort 2129 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2129 used for?

Port 2129 is assigned by IANA to cs-live (cs-live.com).

Is port 2129 TCP or UDP?

Port 2129 is registered for TCP and UDP.

Is it safe to open port 2129?

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 2129 is open?

On Linux run "ss -ltnup 'sport = :2129'", on macOS "lsof -nP -i :2129", and on Windows "netstat -ano | findstr :2129" to see the local process. From another machine, "nmap -p 2129 <host>" shows whether it is reachable.

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