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// Other services

Port 5582: T-Mobile SMS Protocol Message 3

Port 5582 is assigned by IANA to fac-restore (T-Mobile SMS Protocol Message 3).

5582

How fac-restore works

Other services
client:5582fac-restoreresponse client:5582fac-restoreresponse

The client sends a request to port 5582 and the fac-restore 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 5582 dangerous?

We have no specific security note for port 5582. 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 5582

ServicePortTransportDescriptionReferenceUpdated
fac-restore 5582 TCP, UDP T-Mobile SMS Protocol Message 3 - 2008-02-19

// source: IANA service name and port number registry

03 Check it

Which program uses port 5582, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5582'      # process listening on 5582
sudo lsof -nP -i :5582

macOS

sudo lsof -nP -i :5582

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5582 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5582
netstat -ano | findstr :5582

From another machine

nmap -p 5582 -sV <host>
sudo nmap -sU -p 5582 <host>
nc -zv <host> 5582

Block it in the firewall

sudo ufw deny 5582/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5582" -Direction Inbound -LocalPort 5582 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5582 used for?

Port 5582 is assigned by IANA to fac-restore (T-Mobile SMS Protocol Message 3).

Is port 5582 TCP or UDP?

Port 5582 is registered for TCP and UDP.

Is it safe to open port 5582?

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 5582 is open?

On Linux run "ss -ltnup 'sport = :5582'", on macOS "lsof -nP -i :5582", and on Windows "netstat -ano | findstr :5582" to see the local process. From another machine, "nmap -p 5582 <host>" shows whether it is reachable.

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