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// Other services

Port 7999: iRDMI2

Port 7999 is assigned by IANA to irdmi2 (iRDMI2).

7999

How irdmi2 works

Other services
client:7999irdmi2response client:7999irdmi2response

The client sends a request to port 7999 and the irdmi2 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 7999 dangerous?

We have no specific security note for port 7999. 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 7999

ServicePortTransportDescriptionReferenceUpdated
irdmi2 7999 TCP, UDP iRDMI2 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 7999, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7999'      # process listening on 7999
sudo lsof -nP -i :7999

macOS

sudo lsof -nP -i :7999

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7999 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7999
netstat -ano | findstr :7999

From another machine

nmap -p 7999 -sV <host>
sudo nmap -sU -p 7999 <host>
nc -zv <host> 7999

Block it in the firewall

sudo ufw deny 7999/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7999" -Direction Inbound -LocalPort 7999 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7999 used for?

Port 7999 is assigned by IANA to irdmi2 (iRDMI2).

Is port 7999 TCP or UDP?

Port 7999 is registered for TCP and UDP.

Is it safe to open port 7999?

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 7999 is open?

On Linux run "ss -ltnup 'sport = :7999'", on macOS "lsof -nP -i :7999", and on Windows "netstat -ano | findstr :7999" to see the local process. From another machine, "nmap -p 7999 <host>" shows whether it is reachable.

05 Related
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