Anti-DDoS:Modify the back-to-origin settings for a port

Limits

• If your origin servers are deployed on Alibaba Cloud, you can add only the origin servers of the current Alibaba Cloud account when you configure the origin redundancy feature.

• After you enable the origin redundancy feature, you can no longer modify the corresponding port forwarding rule.

Prerequisites

A non-website service is added to Anti-DDoS Pro or Anti-DDoS Premium. For more information, see Manage forwarding rules.

Enable origin redundancy

1. Log on to the Anti-DDoS Pro console.

2. In the top navigation bar, select the region of your asset.

   • Anti-DDoS Proxy (Chinese Mainland): If your instance is an Anti-DDoS Pro instance, select Chinese Mainland.

   • Anti-DDoS Proxy (Outside Chinese Mainland): If your instance is an Anti-DDoS Premium instance, select Outside Chinese Mainland.

   You can switch the region to configure and manage Anti-DDoS Pro or Anti-DDoS Premium instances. Make sure that you select the required region when you use Anti-DDoS Pro or Anti-DDoS Premium.

3. In the left-side navigation pane, choose Provisioning > Port Config.

4. On the page that appears, select the instance that you want to manage. Find the port forwarding rule for which you want to enable the origin redundancy feature and click Back-to-origin Settings in the Actions column.

5. In the Back-to-origin Settings dialog box, configure the parameters and click OK.

   1. Turn on Origin Redundancy. In the Note message, click OK.

      Note

      When you enable the origin redundancy feature, the current origin IP address of the port forwarding rule is automatically used as the IP address of the primary origin server, and service traffic is forwarded to the primary origin server.

   2. Configure the IP addresses of the primary and secondary origin servers and select the origin server that you want to enable.

      You can configure up to 20 IP addresses for each origin server. Separate multiple IP addresses with commas (,).

If the primary back-to-origin link fails, you can select Use Secondary Origin Server in the Back-to-origin Settings dialog box to switch service traffic to the secondary back-to-origin link.

Disable the origin redundancy feature

If you no longer need the origin redundancy feature, you can turn off Origin Redundancy in the Back-to-origin Settings dialog box. After you disable the origin redundancy feature, you can modify the port forwarding rule to change the origin IP address of the port forwarding rule. For more information, see Configure port forwarding rules.