CyberHunter
Local dataset, no network
// Other services

Port 1289: JWalkServer

Port 1289 is assigned by IANA to jwalkserver (JWalkServer).

1289

How jwalkserver works

Other services
client:1289jwalkserverresponse client:1289jwalkserverresponse

The client sends a request to port 1289 and the jwalkserver 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 1289 dangerous?

We have no specific security note for port 1289. 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 1289

ServicePortTransportDescriptionReferenceUpdated
jwalkserver 1289 TCP, UDP JWalkServer - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1289, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1289'      # process listening on 1289
sudo lsof -nP -i :1289

macOS

sudo lsof -nP -i :1289

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1289 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1289
netstat -ano | findstr :1289

From another machine

nmap -p 1289 -sV <host>
sudo nmap -sU -p 1289 <host>
nc -zv <host> 1289

Block it in the firewall

sudo ufw deny 1289/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1289" -Direction Inbound -LocalPort 1289 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1289 used for?

Port 1289 is assigned by IANA to jwalkserver (JWalkServer).

Is port 1289 TCP or UDP?

Port 1289 is registered for TCP and UDP.

Is it safe to open port 1289?

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 1289 is open?

On Linux run "ss -ltnup 'sport = :1289'", on macOS "lsof -nP -i :1289", and on Windows "netstat -ano | findstr :1289" to see the local process. From another machine, "nmap -p 1289 <host>" shows whether it is reachable.

05 Related
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