Port 3743

ipcs-command · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceipcs-command
Registered2003-04

Frequently asked questions

What is port 3743 used for?

Port 3743 is registered with the IANA for ipcs-command (TCP/UDP). Description: IP Control Systems Ltd..

Is port 3743 a well-known port?

No. Port 3743 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3743 is open?

Locally on Linux with ss -tulpn | grep ':3743\b', on Windows with netstat -ano | findstr :3743. To test a remote host use Test-NetConnection <host> -Port 3743 in PowerShell or nc -zv <host> 3743 on Linux/macOS.

How do I open port 3743 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3743/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3743/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3743" -Direction Inbound -Protocol TCP -LocalPort 3743 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPipcs-commandIP Control Systems Ltd.
UDPipcs-commandIP Control Systems Ltd.

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