Port 4789

vxlan · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicevxlan
ReferenceRFC-ietf-nvo3-rfc7348bis-12
Registered2013-04-19
Modified2026-11-05

Frequently asked questions

What is port 4789 used for?

Port 4789 is registered with the IANA for vxlan (TCP/UDP). Description: Virtual eXtensible Local Area Network (VXLAN); Reserved.

Is port 4789 a well-known port?

No. Port 4789 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4789 is open?

Locally on Linux with ss -tulpn | grep ':4789\b', on Windows with netstat -ano | findstr :4789. To test a remote host use Test-NetConnection <host> -Port 4789 in PowerShell or nc -zv <host> 4789 on Linux/macOS.

How do I open port 4789 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4789/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4789/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4789" -Direction Inbound -Protocol TCP -LocalPort 4789 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
UDPvxlanVirtual eXtensible Local Area Network (VXLAN)
TCP–Reserved

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