Port 3904

omnilink-port · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceomnilink-port
Registered2003-10

Frequently asked questions

What is port 3904 used for?

Port 3904 is registered with the IANA for omnilink-port (TCP/UDP). Description: Arnet Omnilink Port.

Is port 3904 a well-known port?

No. Port 3904 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3904 is open?

Locally on Linux with ss -tulpn | grep ':3904\b', on Windows with netstat -ano | findstr :3904. To test a remote host use Test-NetConnection <host> -Port 3904 in PowerShell or nc -zv <host> 3904 on Linux/macOS.

How do I open port 3904 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3904/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3904/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3904" -Direction Inbound -Protocol TCP -LocalPort 3904 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPomnilink-portArnet Omnilink Port
UDPomnilink-portArnet Omnilink Port

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