CyberHunter
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// Other services

Port 2699: Csoft Plus Client

Port 2699 is assigned by IANA to csoft-plusclnt (Csoft Plus Client).

2699

How csoft-plusclnt works

Other services
client:2699csoft-plusclntresponse client:2699csoft-plusclntresponse

The client sends a request to port 2699 and the csoft-plusclnt 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 2699 dangerous?

We have no specific security note for port 2699. 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 2699

ServicePortTransportDescriptionReferenceUpdated
csoft-plusclnt 2699 TCP, UDP Csoft Plus Client - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2699, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2699'      # process listening on 2699
sudo lsof -nP -i :2699

macOS

sudo lsof -nP -i :2699

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2699 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2699
netstat -ano | findstr :2699

From another machine

nmap -p 2699 -sV <host>
sudo nmap -sU -p 2699 <host>
nc -zv <host> 2699

Block it in the firewall

sudo ufw deny 2699/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2699" -Direction Inbound -LocalPort 2699 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2699 used for?

Port 2699 is assigned by IANA to csoft-plusclnt (Csoft Plus Client).

Is port 2699 TCP or UDP?

Port 2699 is registered for TCP and UDP.

Is it safe to open port 2699?

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 2699 is open?

On Linux run "ss -ltnup 'sport = :2699'", on macOS "lsof -nP -i :2699", and on Windows "netstat -ano | findstr :2699" to see the local process. From another machine, "nmap -p 2699 <host>" shows whether it is reachable.

05 Related
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