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// Other services

Port 2326: IDCP

Port 2326 is assigned by IANA to idcp (IDCP).

2326

How idcp works

Other services
client:2326idcpresponse client:2326idcpresponse

The client sends a request to port 2326 and the idcp 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 2326 dangerous?

We have no specific security note for port 2326. 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 2326

ServicePortTransportDescriptionReferenceUpdated
idcp 2326 TCP, UDP IDCP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2326, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2326'      # process listening on 2326
sudo lsof -nP -i :2326

macOS

sudo lsof -nP -i :2326

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2326 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2326
netstat -ano | findstr :2326

From another machine

nmap -p 2326 -sV <host>
sudo nmap -sU -p 2326 <host>
nc -zv <host> 2326

Block it in the firewall

sudo ufw deny 2326/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2326" -Direction Inbound -LocalPort 2326 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2326 used for?

Port 2326 is assigned by IANA to idcp (IDCP).

Is port 2326 TCP or UDP?

Port 2326 is registered for TCP and UDP.

Is it safe to open port 2326?

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 2326 is open?

On Linux run "ss -ltnup 'sport = :2326'", on macOS "lsof -nP -i :2326", and on Windows "netstat -ano | findstr :2326" to see the local process. From another machine, "nmap -p 2326 <host>" shows whether it is reachable.

05 Related
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