CyberHunter
Local dataset, no network
// Other services

Port 1500: VLSI License Manager

Port 1500 is assigned by IANA to vlsi-lm (VLSI License Manager).

1500

How vlsi-lm works

Other services
client:1500vlsi-lmresponse client:1500vlsi-lmresponse

The client sends a request to port 1500 and the vlsi-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 1500 dangerous?

We have no specific security note for port 1500. 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 1500

ServicePortTransportDescriptionReferenceUpdated
vlsi-lm 1500 TCP, UDP VLSI License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1500, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1500'      # process listening on 1500
sudo lsof -nP -i :1500

macOS

sudo lsof -nP -i :1500

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1500 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1500
netstat -ano | findstr :1500

From another machine

nmap -p 1500 -sV <host>
sudo nmap -sU -p 1500 <host>
nc -zv <host> 1500

Block it in the firewall

sudo ufw deny 1500/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1500" -Direction Inbound -LocalPort 1500 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1500 used for?

Port 1500 is assigned by IANA to vlsi-lm (VLSI License Manager).

Is port 1500 TCP or UDP?

Port 1500 is registered for TCP and UDP.

Is it safe to open port 1500?

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 1500 is open?

On Linux run "ss -ltnup 'sport = :1500'", on macOS "lsof -nP -i :1500", and on Windows "netstat -ano | findstr :1500" to see the local process. From another machine, "nmap -p 1500 <host>" shows whether it is reachable.

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