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// Other services

Port 3724: World of Warcraft

Port 3724 is assigned by IANA to blizwow (World of Warcraft).

3724

How blizwow works

Other services
client:3724blizwowresponse client:3724blizwowresponse

The client sends a request to port 3724 and the blizwow 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 3724 dangerous?

We have no specific security note for port 3724. 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 3724

ServicePortTransportDescriptionReferenceUpdated
blizwow 3724 TCP, UDP World of Warcraft - 2005-04

// source: IANA service name and port number registry

03 Check it

Which program uses port 3724, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3724'      # process listening on 3724
sudo lsof -nP -i :3724

macOS

sudo lsof -nP -i :3724

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3724 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3724
netstat -ano | findstr :3724

From another machine

nmap -p 3724 -sV <host>
sudo nmap -sU -p 3724 <host>
nc -zv <host> 3724

Block it in the firewall

sudo ufw deny 3724/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3724" -Direction Inbound -LocalPort 3724 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3724 used for?

Port 3724 is assigned by IANA to blizwow (World of Warcraft).

Is port 3724 TCP or UDP?

Port 3724 is registered for TCP and UDP.

Is it safe to open port 3724?

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 3724 is open?

On Linux run "ss -ltnup 'sport = :3724'", on macOS "lsof -nP -i :3724", and on Windows "netstat -ano | findstr :3724" to see the local process. From another machine, "nmap -p 3724 <host>" shows whether it is reachable.

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