Port 686
hcp-wismar · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | hcp-wismar |
Frequently asked questions
What is port 686 used for?
Port 686 is registered with the IANA for hcp-wismar (TCP/UDP). Description: Hardware Control Protocol Wismar.
Is port 686 a well-known port?
Yes. Port 686 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 686 is open?
Locally on Linux with ss -tulpn | grep ':686\b', on Windows with netstat -ano | findstr :686. To test a remote host use Test-NetConnection <host> -Port 686 in PowerShell or nc -zv <host> 686 on Linux/macOS.
How do I open port 686 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 686/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=686/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 686" -Direction Inbound -Protocol TCP -LocalPort 686 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | hcp-wismar | Hardware Control Protocol Wismar |
| UDP | hcp-wismar | Hardware Control Protocol Wismar |