Port 4165

altcp · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicealtcp
Registered2007-03

Frequently asked questions

What is port 4165 used for?

Port 4165 is registered with the IANA for altcp (TCP/UDP). Description: ArcLink over Ethernet.

Is port 4165 a well-known port?

No. Port 4165 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4165 is open?

Locally on Linux with ss -tulpn | grep ':4165\b', on Windows with netstat -ano | findstr :4165. To test a remote host use Test-NetConnection <host> -Port 4165 in PowerShell or nc -zv <host> 4165 on Linux/macOS.

How do I open port 4165 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4165/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4165/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4165" -Direction Inbound -Protocol TCP -LocalPort 4165 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPaltcpArcLink over Ethernet
UDPaltcpArcLink over Ethernet

Nearby entries