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// Other services

Port 2525: MS V-Worlds

Port 2525 is assigned by IANA to ms-v-worlds (MS V-Worlds).

2525

How ms-v-worlds works

Other services
client:2525ms-v-worldsresponse client:2525ms-v-worldsresponse

The client sends a request to port 2525 and the ms-v-worlds 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 2525 dangerous?

We have no specific security note for port 2525. 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 2525

ServicePortTransportDescriptionReferenceUpdated
ms-v-worlds 2525 TCP, UDP MS V-Worlds - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2525, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2525'      # process listening on 2525
sudo lsof -nP -i :2525

macOS

sudo lsof -nP -i :2525

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2525 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2525
netstat -ano | findstr :2525

From another machine

nmap -p 2525 -sV <host>
sudo nmap -sU -p 2525 <host>
nc -zv <host> 2525

Block it in the firewall

sudo ufw deny 2525/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2525" -Direction Inbound -LocalPort 2525 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2525 used for?

Port 2525 is assigned by IANA to ms-v-worlds (MS V-Worlds).

Is port 2525 TCP or UDP?

Port 2525 is registered for TCP and UDP.

Is it safe to open port 2525?

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 2525 is open?

On Linux run "ss -ltnup 'sport = :2525'", on macOS "lsof -nP -i :2525", and on Windows "netstat -ano | findstr :2525" to see the local process. From another machine, "nmap -p 2525 <host>" shows whether it is reachable.

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