Anti-DDoS Pro and Anti-DDoS Premium provide Layer 4 and Layer 7 health checks for protected non-website services. The health check feature is suitable for services that have more than one origin server IP address. This feature is used to check the availability of the backend servers. After you add a port forwarding rule to Anti-DDoS Pro or Anti-DDoS Premium, you can enable the health check feature for the forwarding rule.
Prerequisites
- A port forwarding rule for a non-website service is configured on the Port Config
page.
For more information, see Create forwarding rules.
- The IP addresses of origin servers are configured in the port forwarding rule.
Notice If you configure only one IP address of the origin server in a port forwarding rule, we recommend that you do not enable the health check feature.
Background information
The health check feature is suitable for services that have more than one origin server IP address. When Anti-DDoS Pro or Anti-DDoS Premium forwards traffic to backend servers, this feature verifies the availability of the backend servers. Therefore, traffic is forwarded to healthy backend servers to ensure that the services properly run. For more information, see Health check overview.