647
DHCP Failover
Medium RiskTCP — System & Infrastructure
Port Overview
Port Number
647
Service Name
DHCP Failover
Transport Protocol
TCP
Category
System & Infrastructure
Security Risk
Medium
Port Range
Well-Known (0-1023)
What is Port 647?
DHCP Failover Protocol, used between redundant DHCP servers to synchronize lease databases and coordinate address assignment. Essential for high-availability DHCP deployments.
TCP
System & Infrastructure
Commonly Used
Security Considerations
Port 647 (DHCP Failover) 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.