Port 18181
opsec-cvp · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | opsec-cvp |
Frequently asked questions
What is port 18181 used for?
Port 18181 is registered with the IANA for opsec-cvp (TCP/UDP). Description: OPSEC CVP.
Is port 18181 a well-known port?
No. Port 18181 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 18181 is open?
Locally on Linux with ss -tulpn | grep ':18181\b', on Windows with netstat -ano | findstr :18181. To test a remote host use Test-NetConnection <host> -Port 18181 in PowerShell or nc -zv <host> 18181 on Linux/macOS.
How do I open port 18181 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 18181/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=18181/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 18181" -Direction Inbound -Protocol TCP -LocalPort 18181 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | opsec-cvp | OPSEC CVP |
| UDP | opsec-cvp | OPSEC CVP |