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// Other services

Port 7588: Sun License Manager

Port 7588 is assigned by IANA to sun-lm (Sun License Manager).

7588

How sun-lm works

Other services
client:7588sun-lmresponse client:7588sun-lmresponse

The client sends a request to port 7588 and the sun-lm 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 7588 dangerous?

We have no specific security note for port 7588. 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 7588

ServicePortTransportDescriptionReferenceUpdated
sun-lm 7588 TCP, UDP Sun License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 7588, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7588'      # process listening on 7588
sudo lsof -nP -i :7588

macOS

sudo lsof -nP -i :7588

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7588 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7588
netstat -ano | findstr :7588

From another machine

nmap -p 7588 -sV <host>
sudo nmap -sU -p 7588 <host>
nc -zv <host> 7588

Block it in the firewall

sudo ufw deny 7588/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7588" -Direction Inbound -LocalPort 7588 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7588 used for?

Port 7588 is assigned by IANA to sun-lm (Sun License Manager).

Is port 7588 TCP or UDP?

Port 7588 is registered for TCP and UDP.

Is it safe to open port 7588?

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 7588 is open?

On Linux run "ss -ltnup 'sport = :7588'", on macOS "lsof -nP -i :7588", and on Windows "netstat -ano | findstr :7588" to see the local process. From another machine, "nmap -p 7588 <host>" shows whether it is reachable.

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