Port 4377
cp-spxsvr · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | cp-spxsvr |
Frequently asked questions
What is port 4377 used for?
Port 4377 is registered with the IANA for cp-spxsvr (TCP/UDP). Description: Cambridge Pixel SPx Server.
Is port 4377 a well-known port?
No. Port 4377 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4377 is open?
Locally on Linux with ss -tulpn | grep ':4377\b', on Windows with netstat -ano | findstr :4377. To test a remote host use Test-NetConnection <host> -Port 4377 in PowerShell or nc -zv <host> 4377 on Linux/macOS.
How do I open port 4377 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4377/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4377/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4377" -Direction Inbound -Protocol TCP -LocalPort 4377 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | cp-spxsvr | Cambridge Pixel SPx Server |
| UDP | cp-spxsvr | Cambridge Pixel SPx Server |