Port 151
hems · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | hems |
Frequently asked questions
What is port 151 used for?
Port 151 is registered with the IANA for hems (TCP/UDP). Description: HEMS.
Is port 151 a well-known port?
Yes. Port 151 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 151 is open?
Locally on Linux with ss -tulpn | grep ':151\b', on Windows with netstat -ano | findstr :151. To test a remote host use Test-NetConnection <host> -Port 151 in PowerShell or nc -zv <host> 151 on Linux/macOS.
How do I open port 151 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 151/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=151/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 151" -Direction Inbound -Protocol TCP -LocalPort 151 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | hems | HEMS |
| UDP | hems | HEMS |