Port 4094
sysrqd · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | sysrqd |
| Registered | 2006-07 |
Frequently asked questions
What is port 4094 used for?
Port 4094 is registered with the IANA for sysrqd (TCP/UDP). Description: sysrq daemon.
Is port 4094 a well-known port?
No. Port 4094 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4094 is open?
Locally on Linux with ss -tulpn | grep ':4094\b', on Windows with netstat -ano | findstr :4094. To test a remote host use Test-NetConnection <host> -Port 4094 in PowerShell or nc -zv <host> 4094 on Linux/macOS.
How do I open port 4094 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4094/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4094/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4094" -Direction Inbound -Protocol TCP -LocalPort 4094 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | sysrqd | sysrq daemon |
| UDP | sysrqd | sysrq daemon |