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// Other services

Port 2022:

Port 2022 is assigned by IANA to down (), xinuexpansion2 ().

2022

How down works

Other services
client:2022downresponse client:2022downresponse

The client sends a request to port 2022 and the down service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 2022 dangerous?

We have no specific security note for port 2022. 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 2022

ServicePortTransportDescriptionReferenceUpdated
down 2022 TCP - -
xinuexpansion2 2022 UDP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2022, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2022'      # process listening on 2022
sudo lsof -nP -i :2022

macOS

sudo lsof -nP -i :2022

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2022 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2022
netstat -ano | findstr :2022

From another machine

nmap -p 2022 -sV <host>
sudo nmap -sU -p 2022 <host>
nc -zv <host> 2022

Block it in the firewall

sudo ufw deny 2022/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2022" -Direction Inbound -LocalPort 2022 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2022 used for?

Port 2022 is assigned by IANA to down (), xinuexpansion2 ().

Is port 2022 TCP or UDP?

Port 2022 is registered for TCP and UDP.

Is it safe to open port 2022?

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 2022 is open?

On Linux run "ss -ltnup 'sport = :2022'", on macOS "lsof -nP -i :2022", and on Windows "netstat -ano | findstr :2022" to see the local process. From another machine, "nmap -p 2022 <host>" shows whether it is reachable.

05 Related
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