Port 3881

idac · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceidac
Registered2003-10

Frequently asked questions

What is port 3881 used for?

Port 3881 is registered with the IANA for idac (TCP/UDP). Description: Data Acquisition and Control.

Is port 3881 a well-known port?

No. Port 3881 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3881 is open?

Locally on Linux with ss -tulpn | grep ':3881\b', on Windows with netstat -ano | findstr :3881. To test a remote host use Test-NetConnection <host> -Port 3881 in PowerShell or nc -zv <host> 3881 on Linux/macOS.

How do I open port 3881 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3881/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3881/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3881" -Direction Inbound -Protocol TCP -LocalPort 3881 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPidacData Acquisition and Control
UDPidacData Acquisition and Control

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