Port 4372

l2c-data · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicel2c-data
Registered2008-07-07

Frequently asked questions

What is port 4372 used for?

Port 4372 is registered with the IANA for l2c-data (TCP/UDP). Description: LAN2CAN Data.

Is port 4372 a well-known port?

No. Port 4372 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4372 is open?

Locally on Linux with ss -tulpn | grep ':4372\b', on Windows with netstat -ano | findstr :4372. To test a remote host use Test-NetConnection <host> -Port 4372 in PowerShell or nc -zv <host> 4372 on Linux/macOS.

How do I open port 4372 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4372/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4372/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4372" -Direction Inbound -Protocol TCP -LocalPort 4372 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPl2c-dataLAN2CAN Data
UDPl2c-dataLAN2CAN Data

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