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Port 44123 (z-wave-tunnel)

IANA assigns port 44123 to z-wave-tunnel: Z-Wave Secure Tunnel.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
z-wave-tunnel TCP Z-Wave Secure Tunnel Sigma Designs Inc -

Registry dates for this port: registered 2012-10-12, last modified 2015-06-26.

Check what is listening on port 44123

Linux: is anything listening on TCP 44123?
sudo ss -tlnp 'sport = :44123'
Linux / macOS: which process owns the port
sudo lsof -nP -i :44123
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':44123 '
Windows (Command Prompt)
netstat -ano | findstr :44123
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 44123 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 44123
From Windows
Test-NetConnection HOST -Port 44123

Block port 44123 in the firewall

ufw
sudo ufw deny 44123/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 44123 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 44123 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 44123' -Direction Inbound -Protocol TCP -LocalPort 44123 -Action Block

Related ports

43440ew-mgmt, ew-disc-cmd43441ciscocsdb44321pmcd44322pmproxy

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