Port 22001

optocontrol · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceoptocontrol

Frequently asked questions

What is port 22001 used for?

Port 22001 is registered with the IANA for optocontrol (TCP/UDP). Description: OptoControl.

Is port 22001 a well-known port?

No. Port 22001 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 22001 is open?

Locally on Linux with ss -tulpn | grep ':22001\b', on Windows with netstat -ano | findstr :22001. To test a remote host use Test-NetConnection <host> -Port 22001 in PowerShell or nc -zv <host> 22001 on Linux/macOS.

How do I open port 22001 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 22001/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=22001/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 22001" -Direction Inbound -Protocol TCP -LocalPort 22001 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPoptocontrolOptoControl
UDPoptocontrolOptoControl

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