Port 4302

d-data-control · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviced-data-control
Registered2006-09

Frequently asked questions

What is port 4302 used for?

Port 4302 is registered with the IANA for d-data-control (TCP/UDP). Description: Diagnostic Data Control.

Is port 4302 a well-known port?

No. Port 4302 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4302 is open?

Locally on Linux with ss -tulpn | grep ':4302\b', on Windows with netstat -ano | findstr :4302. To test a remote host use Test-NetConnection <host> -Port 4302 in PowerShell or nc -zv <host> 4302 on Linux/macOS.

How do I open port 4302 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4302/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4302/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4302" -Direction Inbound -Protocol TCP -LocalPort 4302 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPd-data-controlDiagnostic Data Control
UDPd-data-controlDiagnostic Data Control

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