Port 4390

wiegand · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicewiegand
Registered2008-08-25

Frequently asked questions

What is port 4390 used for?

Port 4390 is registered with the IANA for wiegand (TCP/UDP). Description: Physical Access Control.

Is port 4390 a well-known port?

No. Port 4390 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4390 is open?

Locally on Linux with ss -tulpn | grep ':4390\b', on Windows with netstat -ano | findstr :4390. To test a remote host use Test-NetConnection <host> -Port 4390 in PowerShell or nc -zv <host> 4390 on Linux/macOS.

How do I open port 4390 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4390/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4390/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4390" -Direction Inbound -Protocol TCP -LocalPort 4390 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPwiegandPhysical Access Control
UDPwiegandPhysical Access Control

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