Port 381
hp-collector · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | hp-collector |
Frequently asked questions
What is port 381 used for?
Port 381 is registered with the IANA for hp-collector (TCP/UDP). Description: hp performance data collector.
Is port 381 a well-known port?
Yes. Port 381 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 381 is open?
Locally on Linux with ss -tulpn | grep ':381\b', on Windows with netstat -ano | findstr :381. To test a remote host use Test-NetConnection <host> -Port 381 in PowerShell or nc -zv <host> 381 on Linux/macOS.
How do I open port 381 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 381/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=381/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 381" -Direction Inbound -Protocol TCP -LocalPort 381 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | hp-collector | hp performance data collector |
| UDP | hp-collector | hp performance data collector |