CyberHunter
Local dataset, no network
// Other services

Port 1584: tn-tl-fd2

Port 1584 is assigned by IANA to tn-tl-fd2 (tn-tl-fd2).

1584

How tn-tl-fd2 works

Other services
client:1584tn-tl-fd2response client:1584tn-tl-fd2response

The client sends a request to port 1584 and the tn-tl-fd2 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 1584 dangerous?

We have no specific security note for port 1584. 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 1584

ServicePortTransportDescriptionReferenceUpdated
tn-tl-fd2 1584 TCP, UDP tn-tl-fd2 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1584, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1584'      # process listening on 1584
sudo lsof -nP -i :1584

macOS

sudo lsof -nP -i :1584

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1584 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1584
netstat -ano | findstr :1584

From another machine

nmap -p 1584 -sV <host>
sudo nmap -sU -p 1584 <host>
nc -zv <host> 1584

Block it in the firewall

sudo ufw deny 1584/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1584" -Direction Inbound -LocalPort 1584 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1584 used for?

Port 1584 is assigned by IANA to tn-tl-fd2 (tn-tl-fd2).

Is port 1584 TCP or UDP?

Port 1584 is registered for TCP and UDP.

Is it safe to open port 1584?

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 1584 is open?

On Linux run "ss -ltnup 'sport = :1584'", on macOS "lsof -nP -i :1584", and on Windows "netstat -ano | findstr :1584" to see the local process. From another machine, "nmap -p 1584 <host>" shows whether it is reachable.

05 Related
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