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// Other services

Port 3674: WinINSTALL IPC Port

Port 3674 is assigned by IANA to wininstall-ipc (WinINSTALL IPC Port).

3674

How wininstall-ipc works

Other services
client:3674wininstall-ipcresponse client:3674wininstall-ipcresponse

The client sends a request to port 3674 and the wininstall-ipc 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 3674 dangerous?

We have no specific security note for port 3674. 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 3674

ServicePortTransportDescriptionReferenceUpdated
wininstall-ipc 3674 TCP, UDP WinINSTALL IPC Port - 2008-08-13

// source: IANA service name and port number registry

03 Check it

Which program uses port 3674, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3674'      # process listening on 3674
sudo lsof -nP -i :3674

macOS

sudo lsof -nP -i :3674

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3674 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3674
netstat -ano | findstr :3674

From another machine

nmap -p 3674 -sV <host>
sudo nmap -sU -p 3674 <host>
nc -zv <host> 3674

Block it in the firewall

sudo ufw deny 3674/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3674" -Direction Inbound -LocalPort 3674 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3674 used for?

Port 3674 is assigned by IANA to wininstall-ipc (WinINSTALL IPC Port).

Is port 3674 TCP or UDP?

Port 3674 is registered for TCP and UDP.

Is it safe to open port 3674?

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 3674 is open?

On Linux run "ss -ltnup 'sport = :3674'", on macOS "lsof -nP -i :3674", and on Windows "netstat -ano | findstr :3674" to see the local process. From another machine, "nmap -p 3674 <host>" shows whether it is reachable.

05 Related
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