Port 4109

izm · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceizm
Registered2007-02

Frequently asked questions

What is port 4109 used for?

Port 4109 is registered with the IANA for izm (TCP/UDP). Description: Instantiated Zero-control Messaging.

Is port 4109 a well-known port?

No. Port 4109 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4109 is open?

Locally on Linux with ss -tulpn | grep ':4109\b', on Windows with netstat -ano | findstr :4109. To test a remote host use Test-NetConnection <host> -Port 4109 in PowerShell or nc -zv <host> 4109 on Linux/macOS.

How do I open port 4109 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4109/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4109/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4109" -Direction Inbound -Protocol TCP -LocalPort 4109 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPizmInstantiated Zero-control Messaging
UDPizmInstantiated Zero-control Messaging

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