Port 5423

virtualuser · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicevirtualuser

Frequently asked questions

What is port 5423 used for?

Port 5423 is registered with the IANA for virtualuser (TCP/UDP). Description: VIRTUALUSER.

Is port 5423 a well-known port?

No. Port 5423 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 5423 is open?

Locally on Linux with ss -tulpn | grep ':5423\b', on Windows with netstat -ano | findstr :5423. To test a remote host use Test-NetConnection <host> -Port 5423 in PowerShell or nc -zv <host> 5423 on Linux/macOS.

How do I open port 5423 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 5423/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=5423/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 5423" -Direction Inbound -Protocol TCP -LocalPort 5423 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPvirtualuserVIRTUALUSER
UDPvirtualuserVIRTUALUSER

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