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Port 23004 (inovaport5)

IANA assigns port 23004 to inovaport5: Inova LightLink Server Type 5.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
inovaport5 TCP Inova LightLink Server Type 5 Chris Koeritz 3 -
inovaport5 UDP Inova LightLink Server Type 5 Chris Koeritz 3 -

Registry dates for this port: registered 2006-10.

Check what is listening on port 23004

Linux: is anything listening on TCP 23004?
sudo ss -tlnp 'sport = :23004'
Linux: UDP 23004
sudo ss -ulnp 'sport = :23004'
Linux / macOS: which process owns the port
sudo lsof -nP -i :23004
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':23004 '
Windows (Command Prompt)
netstat -ano | findstr :23004
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 23004 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 23004
From Windows
Test-NetConnection HOST -Port 23004
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 23004

Block port 23004 in the firewall

ufw
sudo ufw deny 23004/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 23004 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 23004 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 23004' -Direction Inbound -Protocol TCP -LocalPort 23004 -Action Block
ufw
sudo ufw deny 23004/udp
iptables
sudo iptables -A INPUT -p udp --dport 23004 -j DROP
nftables
sudo nft add rule inet filter input udp dport 23004 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 23004' -Direction Inbound -Protocol UDP -LocalPort 23004 -Action Block

Related ports

23002inovaport323003inovaport423005inovaport623053gntp

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