Port 4194
spdm · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | spdm |
| Registered | 2022-01-10 |
| Modified | 2025-05-30 |
Frequently asked questions
What is port 4194 used for?
Port 4194 is registered with the IANA for spdm (TCP/UDP). Description: Security Protocol and Data Model; Reserved.
Is port 4194 a well-known port?
No. Port 4194 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4194 is open?
Locally on Linux with ss -tulpn | grep ':4194\b', on Windows with netstat -ano | findstr :4194. To test a remote host use Test-NetConnection <host> -Port 4194 in PowerShell or nc -zv <host> 4194 on Linux/macOS.
How do I open port 4194 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4194/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4194/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4194" -Direction Inbound -Protocol TCP -LocalPort 4194 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | spdm | Security Protocol and Data Model |
| UDP | – | Reserved |