500
IKE/ISAKMP
Medium RiskUDP — Security & VPN
Port Overview
Port Number
500
Service Name
IKE/ISAKMP
Transport Protocol
UDP
Category
Security & VPN
Security Risk
Medium
Port Range
Well-Known (0-1023)
What is Port 500?
Port 500 is assigned to IKE (Internet Key Exchange) and ISAKMP, the key negotiation protocols used to establish IPsec VPN tunnels. Primary port for VPN gateway negotiation.
UDP
Security & VPN
Commonly Used
Security Considerations
Port 500 (IKE/ISAKMP) 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.