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// Other services

Port 3926: WINPort

Port 3926 is assigned by IANA to winport (WINPort).

3926

How winport works

Other services
client:3926winportresponse client:3926winportresponse

The client sends a request to port 3926 and the winport 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 3926 dangerous?

We have no specific security note for port 3926. 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 3926

ServicePortTransportDescriptionReferenceUpdated
winport 3926 TCP, UDP WINPort - 2003-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 3926, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3926'      # process listening on 3926
sudo lsof -nP -i :3926

macOS

sudo lsof -nP -i :3926

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3926 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3926
netstat -ano | findstr :3926

From another machine

nmap -p 3926 -sV <host>
sudo nmap -sU -p 3926 <host>
nc -zv <host> 3926

Block it in the firewall

sudo ufw deny 3926/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3926" -Direction Inbound -LocalPort 3926 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3926 used for?

Port 3926 is assigned by IANA to winport (WINPort).

Is port 3926 TCP or UDP?

Port 3926 is registered for TCP and UDP.

Is it safe to open port 3926?

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 3926 is open?

On Linux run "ss -ltnup 'sport = :3926'", on macOS "lsof -nP -i :3926", and on Windows "netstat -ano | findstr :3926" to see the local process. From another machine, "nmap -p 3926 <host>" shows whether it is reachable.

05 Related
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