4789
VXLAN
Medium RiskUDP — 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.