- Patch VPN gateways quickly: they are a top initial access target.
- Use certificates or MFA rather than shared secrets.
- Investigate unexpected tunnels and proxies: they are also attacker tools.
Port 44123: Z-Wave Secure Tunnel
Port 44123 is assigned by IANA to z-wave-tunnel (Z-Wave Secure Tunnel).
44123
How z-wave-tunnel works
VPN, tunnels & proxiesTraffic is wrapped in a tunnel between the two ends, so the network in between only sees the tunnel.
- Transport
- TCP
- 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
- VPN, tunnels & proxies
Is port 44123 dangerous?
We have no specific security note for port 44123. Its risk depends on the program actually listening on it. General advice for vpn, tunnels & proxies services:
IANA registry entries for port 44123
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| z-wave-tunnel | 44123 | TCP | Z-Wave Secure Tunnel | - | 2015-06-26 |
| - | 44123 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 44123, and is it reachable?
Linux
sudo ss -ltnup 'sport = :44123' # process listening on 44123
sudo lsof -nP -i :44123macOS
sudo lsof -nP -i :44123
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 44123 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 44123 netstat -ano | findstr :44123
From another machine
nmap -p 44123 -sV <host> nc -zv <host> 44123
Block it in the firewall
sudo ufw deny 44123/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 44123" -Direction Inbound -LocalPort 44123 -Protocol TCP -Action Block # Windows
What is port 44123 used for?
Port 44123 is assigned by IANA to z-wave-tunnel (Z-Wave Secure Tunnel).
Is port 44123 TCP or UDP?
Port 44123 is registered for TCP.
Is it safe to open port 44123?
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. Patch VPN gateways quickly: they are a top initial access target.
How do I check if port 44123 is open?
On Linux run "ss -ltnup 'sport = :44123'", on macOS "lsof -nP -i :44123", and on Windows "netstat -ano | findstr :44123" to see the local process. From another machine, "nmap -p 44123 <host>" shows whether it is reachable.