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Port 7420 (ipluminary)

IANA assigns port 7420 to ipluminary: Multichannel real-time lighting control.

Registered (user) port, 1024-49151 UDP

Port 7420 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
ipluminary UDP Multichannel real-time lighting control Tristan Seifert 3 -

Registry dates for this port: registered 2018-01-18.

Check what is listening on port 7420

Linux: UDP 7420
sudo ss -ulnp 'sport = :7420'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7420
Windows (Command Prompt)
netstat -ano | findstr :7420
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 7420

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7420

Block port 7420 in the firewall

ufw
sudo ufw deny 7420/udp
iptables
sudo iptables -A INPUT -p udp --dport 7420 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7420 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7420' -Direction Inbound -Protocol UDP -LocalPort 7420 -Action Block

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All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.