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// Other services

Port 2922: CESD Contents Delivery Data Transfer

Port 2922 is assigned by IANA to cesdcdtrn (CESD Contents Delivery Data Transfer).

2922

How cesdcdtrn works

Other services
client:2922cesdcdtrnresponse client:2922cesdcdtrnresponse

The client sends a request to port 2922 and the cesdcdtrn 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 2922 dangerous?

We have no specific security note for port 2922. 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 2922

ServicePortTransportDescriptionReferenceUpdated
cesdcdtrn 2922 TCP, UDP CESD Contents Delivery Data Transfer - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2922, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2922'      # process listening on 2922
sudo lsof -nP -i :2922

macOS

sudo lsof -nP -i :2922

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2922 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2922
netstat -ano | findstr :2922

From another machine

nmap -p 2922 -sV <host>
sudo nmap -sU -p 2922 <host>
nc -zv <host> 2922

Block it in the firewall

sudo ufw deny 2922/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2922" -Direction Inbound -LocalPort 2922 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2922 used for?

Port 2922 is assigned by IANA to cesdcdtrn (CESD Contents Delivery Data Transfer).

Is port 2922 TCP or UDP?

Port 2922 is registered for TCP and UDP.

Is it safe to open port 2922?

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 2922 is open?

On Linux run "ss -ltnup 'sport = :2922'", on macOS "lsof -nP -i :2922", and on Windows "netstat -ano | findstr :2922" to see the local process. From another machine, "nmap -p 2922 <host>" shows whether it is reachable.

05 Related
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