CyberHunter
Local dataset, no network
// Other services

Port 1909: Global World Link

Port 1909 is assigned by IANA to global-wlink (Global World Link).

1909

How global-wlink works

Other services
client:1909global-wlinkresponse client:1909global-wlinkresponse

The client sends a request to port 1909 and the global-wlink 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 1909 dangerous?

We have no specific security note for port 1909. 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 1909

ServicePortTransportDescriptionReferenceUpdated
global-wlink 1909 TCP, UDP Global World Link - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1909, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1909'      # process listening on 1909
sudo lsof -nP -i :1909

macOS

sudo lsof -nP -i :1909

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1909 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1909
netstat -ano | findstr :1909

From another machine

nmap -p 1909 -sV <host>
sudo nmap -sU -p 1909 <host>
nc -zv <host> 1909

Block it in the firewall

sudo ufw deny 1909/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1909" -Direction Inbound -LocalPort 1909 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1909 used for?

Port 1909 is assigned by IANA to global-wlink (Global World Link).

Is port 1909 TCP or UDP?

Port 1909 is registered for TCP and UDP.

Is it safe to open port 1909?

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 1909 is open?

On Linux run "ss -ltnup 'sport = :1909'", on macOS "lsof -nP -i :1909", and on Windows "netstat -ano | findstr :1909" to see the local process. From another machine, "nmap -p 1909 <host>" shows whether it is reachable.

05 Related
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