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// Other services

Port 4882: SOCP Control Protocol

Port 4882 is assigned by IANA to socp-c (SOCP Control Protocol).

4882

How socp-c works

Other services
client:4882socp-cresponse client:4882socp-cresponse

The client sends a request to port 4882 and the socp-c service answers.

Transport
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 4882 dangerous?

We have no specific security note for port 4882. 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 4882

ServicePortTransportDescriptionReferenceUpdated
socp-c 4882 UDP SOCP Control Protocol - 2010-05-28
-4882-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4882, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4882'      # process listening on 4882
sudo lsof -nP -i :4882

macOS

sudo lsof -nP -i :4882

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4882 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4882
netstat -ano | findstr :4882

From another machine

nmap -p 4882 -sV <host>
sudo nmap -sU -p 4882 <host>
nc -zv <host> 4882

Block it in the firewall

sudo ufw deny 4882/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4882" -Direction Inbound -LocalPort 4882 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 4882 used for?

Port 4882 is assigned by IANA to socp-c (SOCP Control Protocol).

Is port 4882 TCP or UDP?

Port 4882 is registered for UDP.

Is it safe to open port 4882?

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 4882 is open?

On Linux run "ss -ltnup 'sport = :4882'", on macOS "lsof -nP -i :4882", and on Windows "netstat -ano | findstr :4882" to see the local process. From another machine, "nmap -p 4882 <host>" shows whether it is reachable.

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