CyberHunter
Local dataset, no network
// Other services

Port 2323: 3d-nfsd

Port 2323 is assigned by IANA to 3d-nfsd (3d-nfsd).

2323

How 3d-nfsd works

Other services
client:23233d-nfsdresponse client:23233d-nfsdresponse

The client sends a request to port 2323 and the 3d-nfsd 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 2323 dangerous?

We have no specific security note for port 2323. 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 2323

ServicePortTransportDescriptionReferenceUpdated
3d-nfsd 2323 TCP, UDP 3d-nfsd - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2323, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2323'      # process listening on 2323
sudo lsof -nP -i :2323

macOS

sudo lsof -nP -i :2323

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2323 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2323
netstat -ano | findstr :2323

From another machine

nmap -p 2323 -sV <host>
sudo nmap -sU -p 2323 <host>
nc -zv <host> 2323

Block it in the firewall

sudo ufw deny 2323/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2323" -Direction Inbound -LocalPort 2323 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2323 used for?

Port 2323 is assigned by IANA to 3d-nfsd (3d-nfsd).

Is port 2323 TCP or UDP?

Port 2323 is registered for TCP and UDP.

Is it safe to open port 2323?

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 2323 is open?

On Linux run "ss -ltnup 'sport = :2323'", on macOS "lsof -nP -i :2323", and on Windows "netstat -ano | findstr :2323" to see the local process. From another machine, "nmap -p 2323 <host>" shows whether it is reachable.

05 Related
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