Port 744

flexlm · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Serviceflexlm

Frequently asked questions

What is port 744 used for?

Port 744 is registered with the IANA for flexlm (TCP/UDP). Description: Flexible License Manager.

Is port 744 a well-known port?

Yes. Port 744 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.

How do I check whether port 744 is open?

Locally on Linux with ss -tulpn | grep ':744\b', on Windows with netstat -ano | findstr :744. To test a remote host use Test-NetConnection <host> -Port 744 in PowerShell or nc -zv <host> 744 on Linux/macOS.

How do I open port 744 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 744/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=744/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 744" -Direction Inbound -Protocol TCP -LocalPort 744 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPflexlmFlexible License Manager
UDPflexlmFlexible License Manager

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