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// Other services

Port 2971: NetClip clipboard daemon

Port 2971 is assigned by IANA to netclip (NetClip clipboard daemon).

2971

How netclip works

Other services
client:2971netclipresponse client:2971netclipresponse

The client sends a request to port 2971 and the netclip 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 2971 dangerous?

We have no specific security note for port 2971. 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 2971

ServicePortTransportDescriptionReferenceUpdated
netclip 2971 TCP, UDP NetClip clipboard daemon - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2971, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2971'      # process listening on 2971
sudo lsof -nP -i :2971

macOS

sudo lsof -nP -i :2971

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2971 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2971
netstat -ano | findstr :2971

From another machine

nmap -p 2971 -sV <host>
sudo nmap -sU -p 2971 <host>
nc -zv <host> 2971

Block it in the firewall

sudo ufw deny 2971/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2971" -Direction Inbound -LocalPort 2971 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2971 used for?

Port 2971 is assigned by IANA to netclip (NetClip clipboard daemon).

Is port 2971 TCP or UDP?

Port 2971 is registered for TCP and UDP.

Is it safe to open port 2971?

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 2971 is open?

On Linux run "ss -ltnup 'sport = :2971'", on macOS "lsof -nP -i :2971", and on Windows "netstat -ano | findstr :2971" to see the local process. From another machine, "nmap -p 2971 <host>" shows whether it is reachable.

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