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// Other services

Port 4871: Wired

Port 4871 is assigned by IANA to wired (Wired).

4871

How wired works

Other services
client:4871wiredresponse client:4871wiredresponse

The client sends a request to port 4871 and the wired 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 4871 dangerous?

We have no specific security note for port 4871. 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 4871

ServicePortTransportDescriptionReferenceUpdated
wired 4871 TCP, UDP Wired - 2006-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 4871, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4871'      # process listening on 4871
sudo lsof -nP -i :4871

macOS

sudo lsof -nP -i :4871

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4871 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4871
netstat -ano | findstr :4871

From another machine

nmap -p 4871 -sV <host>
sudo nmap -sU -p 4871 <host>
nc -zv <host> 4871

Block it in the firewall

sudo ufw deny 4871/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4871" -Direction Inbound -LocalPort 4871 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4871 used for?

Port 4871 is assigned by IANA to wired (Wired).

Is port 4871 TCP or UDP?

Port 4871 is registered for TCP and UDP.

Is it safe to open port 4871?

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 4871 is open?

On Linux run "ss -ltnup 'sport = :4871'", on macOS "lsof -nP -i :4871", and on Windows "netstat -ano | findstr :4871" to see the local process. From another machine, "nmap -p 4871 <host>" shows whether it is reachable.

05 Related
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