IPFYI
:500 (UDP)

IKE/ISAKMP

Medium Risk

UDP — Security & VPN

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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.