Before you update DNS settings and route all the traffic to Anti-DDoS Pro, we recommend that you verify the forwarding settings locally to guarantee availability.
To perform the verification, manually bind the virtual IP address provided by Anti-DDoS Pro with the domain name in your local hosts file (for example,C:\Windows\System32\drivers\etc\hosts, in Windows). The domain name is then resolved to Alibaba Cloud’s IP address solely on your local device.
Anti-DDoS Pro refreshes your local DNS cache (for example, ipconfig/flushdns in Windows CMD) and loads this domain name in your browser. If your protection service does not have a domain name, you can directly replace the server’s IP address with the virtual IP address acquired in the local testing environment.
If the service is accessed successfully, your configuration is properly set.
Otherwise, check your configuration or open a ticket to contact Alibaba Cloud Technical Support.