Port 4066

pmas · TCP/UDP

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

Frequently asked questions

What is port 4066 used for?

Port 4066 is registered with the IANA for pmas (TCP/UDP). Description: Performance Measurement and Analysis.

Is port 4066 a well-known port?

No. Port 4066 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4066 is open?

Locally on Linux with ss -tulpn | grep ':4066\b', on Windows with netstat -ano | findstr :4066. To test a remote host use Test-NetConnection <host> -Port 4066 in PowerShell or nc -zv <host> 4066 on Linux/macOS.

How do I open port 4066 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4066/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4066/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4066" -Direction Inbound -Protocol TCP -LocalPort 4066 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPpmasPerformance Measurement and Analysis
UDPpmasPerformance Measurement and Analysis

Nearby entries