Is port 4789 (VXLAN) dangerous?

Port 4789 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 4789 be open on my firewall?

Port 4789 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 4789 use?

Port 4789 (VXLAN) uses the UDP transport protocol and falls under the System & Infrastructure category.

:4789 (UDP)

VXLAN

Medium Risk

UDP — System & Infrastructure

Port Overview

Port Number 4789

Service Name VXLAN

Transport Protocol UDP

Category System & Infrastructure

Security Risk Medium

Port Range Registered (1024-49151)

What is Port 4789?

Port 4789 is the standard IANA-assigned port for VXLAN (Virtual Extensible LAN), a network virtualization protocol used extensively in cloud computing and software-defined networking. VXLAN encapsulates Layer 2 Ethernet frames within UDP packets to extend virtual networks across Layer 3 boundaries. It is heavily used by Docker, Kubernetes, and OpenStack for container and VM networking.

UDP System & Infrastructure Commonly Used

Security Considerations

Port 4789 (VXLAN) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.

Recommendation: Keep the service updated. Monitor logs for unusual activity.

Related Ports — System & Infrastructure

0 Reserved 1 TCPMUX 2 Management Utility 3 CompressNET 4 Unassigned 5 RJE 6 Unassigned 7 Echo

Related Terms

Bandwidth Latency Packet Loss Ping Throughput ASN