Port 4378

cp-spxdpy · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicecp-spxdpy
Registered2007-07-05

Frequently asked questions

What is port 4378 used for?

Port 4378 is registered with the IANA for cp-spxdpy (TCP/UDP). Description: Cambridge Pixel SPx Display.

Is port 4378 a well-known port?

No. Port 4378 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4378 is open?

Locally on Linux with ss -tulpn | grep ':4378\b', on Windows with netstat -ano | findstr :4378. To test a remote host use Test-NetConnection <host> -Port 4378 in PowerShell or nc -zv <host> 4378 on Linux/macOS.

How do I open port 4378 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4378/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4378/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4378" -Direction Inbound -Protocol TCP -LocalPort 4378 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPcp-spxdpyCambridge Pixel SPx Display
UDPcp-spxdpyCambridge Pixel SPx Display

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