CyberHunter
Local dataset, no network
// Other services

Port 1727: winddx

Port 1727 is assigned by IANA to winddx (winddx).

1727

How winddx works

Other services
client:1727winddxresponse client:1727winddxresponse

The client sends a request to port 1727 and the winddx 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 1727 dangerous?

We have no specific security note for port 1727. 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 1727

ServicePortTransportDescriptionReferenceUpdated
winddx 1727 TCP, UDP winddx - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1727, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1727'      # process listening on 1727
sudo lsof -nP -i :1727

macOS

sudo lsof -nP -i :1727

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1727 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1727
netstat -ano | findstr :1727

From another machine

nmap -p 1727 -sV <host>
sudo nmap -sU -p 1727 <host>
nc -zv <host> 1727

Block it in the firewall

sudo ufw deny 1727/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1727" -Direction Inbound -LocalPort 1727 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1727 used for?

Port 1727 is assigned by IANA to winddx (winddx).

Is port 1727 TCP or UDP?

Port 1727 is registered for TCP and UDP.

Is it safe to open port 1727?

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 1727 is open?

On Linux run "ss -ltnup 'sport = :1727'", on macOS "lsof -nP -i :1727", and on Windows "netstat -ano | findstr :1727" to see the local process. From another machine, "nmap -p 1727 <host>" shows whether it is reachable.

05 Related
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