Port 3966

bflckmgr · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicebflckmgr
Registered2005-08

Frequently asked questions

What is port 3966 used for?

Port 3966 is registered with the IANA for bflckmgr (TCP/UDP). Description: BuildForge Lock Manager.

Is port 3966 a well-known port?

No. Port 3966 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3966 is open?

Locally on Linux with ss -tulpn | grep ':3966\b', on Windows with netstat -ano | findstr :3966. To test a remote host use Test-NetConnection <host> -Port 3966 in PowerShell or nc -zv <host> 3966 on Linux/macOS.

How do I open port 3966 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3966/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3966/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3966" -Direction Inbound -Protocol TCP -LocalPort 3966 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPbflckmgrBuildForge Lock Manager
UDPbflckmgrBuildForge Lock Manager

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