CyberHunter
Local dataset, no network
// Other services

Port 2344: fcmsys

Port 2344 is assigned by IANA to fcmsys (fcmsys).

2344

How fcmsys works

Other services
client:2344fcmsysresponse client:2344fcmsysresponse

The client sends a request to port 2344 and the fcmsys 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 2344 dangerous?

We have no specific security note for port 2344. 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 2344

ServicePortTransportDescriptionReferenceUpdated
fcmsys 2344 TCP, UDP fcmsys - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2344, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2344'      # process listening on 2344
sudo lsof -nP -i :2344

macOS

sudo lsof -nP -i :2344

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2344 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2344
netstat -ano | findstr :2344

From another machine

nmap -p 2344 -sV <host>
sudo nmap -sU -p 2344 <host>
nc -zv <host> 2344

Block it in the firewall

sudo ufw deny 2344/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2344" -Direction Inbound -LocalPort 2344 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2344 used for?

Port 2344 is assigned by IANA to fcmsys (fcmsys).

Is port 2344 TCP or UDP?

Port 2344 is registered for TCP and UDP.

Is it safe to open port 2344?

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 2344 is open?

On Linux run "ss -ltnup 'sport = :2344'", on macOS "lsof -nP -i :2344", and on Windows "netstat -ano | findstr :2344" to see the local process. From another machine, "nmap -p 2344 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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