Port 3799

radius-dynauth · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceradius-dynauth
ReferenceRFC 3576

Frequently asked questions

What is port 3799 used for?

Port 3799 is registered with the IANA for radius-dynauth (TCP/UDP). Description: RADIUS Dynamic Authorization.

Is port 3799 a well-known port?

No. Port 3799 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3799 is open?

Locally on Linux with ss -tulpn | grep ':3799\b', on Windows with netstat -ano | findstr :3799. To test a remote host use Test-NetConnection <host> -Port 3799 in PowerShell or nc -zv <host> 3799 on Linux/macOS.

How do I open port 3799 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3799/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3799/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3799" -Direction Inbound -Protocol TCP -LocalPort 3799 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPradius-dynauthRADIUS Dynamic Authorization
UDPradius-dynauthRADIUS Dynamic Authorization

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