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// Other services

Port 1542: gridgen-elmd

Port 1542 is assigned by IANA to gridgen-elmd (gridgen-elmd).

1542

How gridgen-elmd works

Other services
client:1542gridgen-elmdresponse client:1542gridgen-elmdresponse

The client sends a request to port 1542 and the gridgen-elmd 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 1542 dangerous?

We have no specific security note for port 1542. 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 1542

ServicePortTransportDescriptionReferenceUpdated
gridgen-elmd 1542 TCP, UDP gridgen-elmd - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1542, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1542'      # process listening on 1542
sudo lsof -nP -i :1542

macOS

sudo lsof -nP -i :1542

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1542 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1542
netstat -ano | findstr :1542

From another machine

nmap -p 1542 -sV <host>
sudo nmap -sU -p 1542 <host>
nc -zv <host> 1542

Block it in the firewall

sudo ufw deny 1542/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1542" -Direction Inbound -LocalPort 1542 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1542 used for?

Port 1542 is assigned by IANA to gridgen-elmd (gridgen-elmd).

Is port 1542 TCP or UDP?

Port 1542 is registered for TCP and UDP.

Is it safe to open port 1542?

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 1542 is open?

On Linux run "ss -ltnup 'sport = :1542'", on macOS "lsof -nP -i :1542", and on Windows "netstat -ano | findstr :1542" to see the local process. From another machine, "nmap -p 1542 <host>" shows whether it is reachable.

05 Related
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