If you want to use Anti-DDoS Pro or Anti-DDoS Premium to protect your website against DDoS attacks, you can add your website to Anti-DDoS Pro or Anti-DDoS Premium. Anti-DDoS Pro and Anti-DDoS Premium protect your website only after you add the website to Anti-DDoS Pro or Anti-DDoS Premium and complete forwarding settings. This topic describes how to add your website. This topic also describes how to import the configurations of more than one website to Anti-DDoS Pro or Anti-DDoS Premium at a time.

Background information

If you want to add your website to Anti-DDoS Pro, make sure that Internet Content Provider (ICP) filing is complete for the domain name of your website. The information that you use to complete the ICP filing of your domain name must be consistent with the actual information about your domain name. This ensures the validity of the ICP filing. After you add your website to Anti-DDoS Pro, we recommend that you keep the ICP filing information up-to-date. Anti-DDoS Pro checks the status of ICP filing for protected domain names on a regular basis. If the ICP filing of a domain name becomes invalid, Anti-DDoS Pro no longer forwards the traffic of the domain name and displays the message "Invalid ICP domain recordation. Please update the ICP recordation status" on the Website Config page. If the message is displayed and you want to resume traffic forwarding, you must update the ICP filing information for the domain name at the earliest opportunity and submit a ticket.

Prerequisites

Add one or more websites

  1. Log on to the Anti-DDoS Pro console.
  2. Log on to the Anti-DDoS Pro console.
  3. Log on to the Anti-DDoS Pro console.
  4. In the top navigation bar, select the region where your instance resides.
    • Mainland China: If you select this region, the Anti-DDoS Pro console appears.
    • Outside Mainland China: If you select this region, the Anti-DDoS Premium console appears.
    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.
  5. In the left-side navigation pane, choose Provisioning > Website Config.
  6. On the Website Config page, add one or more websites.
    You can add one or more websites to Anti-DDoS Pro or Anti-DDoS Premium:
    • To add a website, click Add Domain. Then, follow the instructions on the page to complete the Add Domain wizard.
      1. Configure the parameters in the Enter Site Information step and click Add.
        Parameter Description
        Function Plan The function plan of the Anti-DDoS Pro or Anti-DDoS Premium instance that you want to use. Valid values: Standard and Enhanced.

        You can move the pointer over the Function plan description icon next to Function Plan to view the differences between the Standard and Enhanced function plans.

        Instance The Anti-DDoS Pro or Anti-DDoS Premium instance that you want to use. You can associate a maximum of eight instances with a domain name. The instances associated with the domain name must use the same function plan.

        Available instances are displayed after you configure Function Plan. If no instances are displayed, no instances use the function plan that you select. In this case, you can purchase an instance or upgrade the Standard function plan to the Enhanced function plan. For more information, see Upgrade an instance.

        Domain The domain name of the website that you want to protect. The domain name must meet the following requirements:
        • The domain name can contain letters, digits, and hyphens (-). The domain name must start with a letter or a digit.
        • The domain name can be a wildcard domain name, such as *.aliyundoc.com. If you enter a wildcard domain name, Anti-DDoS Pro or Anti-DDoS Premium automatically matches all subdomains of the wildcard domain name.
        • If you configure a wildcard domain name and an exact-match domain name, the forwarding rules and mitigation policies of the exact-match domain name take precedence. For example, if you configure *.aliyundoc.com and www.aliyundoc.com, the forwarding rules and mitigation policies of www.aliyundoc.com take precedence.
        Protocol The type of the protocol that the website uses. Valid values:
        • HTTP
        • HTTPS: If the website uses HTTPS, select HTTPS and upload an SSL certificate file after you save the website configurations. For more information, see Upload an SSL certificate. You can also customize a Transport Layer Security (TLS) policy for the website. For more information, see Configure a custom TLS security policy.
          If you select HTTPS, you can click Advanced Settings to configure the following options.
          • Enable HTTPS Routing: If the website supports both HTTP and HTTPS, this feature is available. If you enable this feature, all HTTP requests to access the website are redirected to HTTPS requests on the standard port 443.
            Notice
            • This feature is available only when both HTTP and HTTPS are selected and Websocket is cleared.
            • If you access the website over HTTP on a non-standard port and enable this feature, all HTTP requests are redirected to HTTPS requests on the standard port 443.
          • Enable HTTP: If the website does not support HTTPS, you must turn on Enable HTTP. If this feature is enabled, all HTTPS requests are redirected to HTTP requests and forwarded to origin servers, and all WebSockets requests are redirected to WebSocket requests and forwarded to origin servers. By default, the requests are redirected over the standard port 80.
            Notice If you access the website over HTTPS on a non-standard port and enable this feature, all HTTPS requests are redirected to HTTP requests on the standard port 80.
          • Enable HTTP2: After you turn on Enable HTTP/2, HTTP/2 is used.
        • Websocket: If you select Websocket, HTTP is automatically selected. You cannot select only Websocket for the Protocol parameter.
        • Websockets: If you select Websockets, HTTPS is automatically selected. You cannot select only Websockets for the Protocol parameter.
        Enable OCSP Specifies whether to enable the OCSP Online Certificate Status Protocol (OCSP) feature.
        Notice This feature is available only for a website that supports HTTPS. If HTTPS is selected for Protocol, we recommend that you enable this feature.
        • The OCSP feature is disabled by default. In this case, OCSP queries are sent from a browser that the client uses to a CA. Before the client obtains an OCSP response, subsequent events are blocked. If transient connections or network disconnections occur, a blank page is displayed for a long period of time, and the performance of the website that supports HTTPS is compromised.
        • If the OCSP feature is enabled, Anti-DDoS Pro or Anti-DDoS Premium executes OCSP queries and caches the query results for 300 seconds. When a client initiates a TLS handshake with the server, Anti-DDoS Pro or Anti-DDoS Premium returns the OCSP details and the certificate chain to the client. This prevents blocking issues caused by OCSP queries from the client. OCSP does not cause security risks because OCSP responses cannot be forged.
        Server IP The address type of the origin server. You must enter the address of the origin server. Valid values:
        • Origin Server IP: the IP address of the origin server. You can enter a maximum of 20 IP addresses. If you enter more than one IP address, separate them with commas (,).
          • If the origin server is hosted on an Elastic Compute Service (ECS) instance, enter the public IP address of the ECS instance. If the ECS instance is associated with a Server Load Balancer (SLB) instance, enter the public IP address of the SLB instance.
          • If the origin server is deployed in data centers or on other clouds, you can run the ping Domain name command to query the public IP address to which the domain name is resolved and enter the public IP address.
        • Origin Server Domain: the domain name of the origin server. Select this option when you deploy a proxy service, such as Web Application Firewall (WAF), between the origin server and Anti-DDoS Pro or Anti-DDoS Premium. You must also enter the address of the proxy, such as a CNAME. You can enter a maximum of 10 domain names. If you enter more than one domain name, separate them with line breaks.

          If you want to use Anti-DDoS Pro or Anti-DDoS Premium together with WAF, select Origin Server Domain and enter the CNAME that WAF assigns. This provides enhanced protection for the website. For more information, see Protect a website service by using both Anti-DDoS Pro or Anti-DDoS Premium and WAF

          Notice If you enter the default public endpoint of an Object Storage Service (OSS) bucket for Origin Server Domain, a custom domain name must be mapped to the bucket. For more information, see Regions and endpoints and Map custom domain names.

        If you enter more than one IP address or domain name, Anti-DDoS Pro or Anti-DDoS Premium uses IP hash to forward website traffic to the origin servers. After you save the website configurations, you can change the load balancing algorithm. For more information, see Modify the back-to-origin settings for a website.

        Server Port The server port that you specify based on the value of Protocol.
        If you select HTTP, the default port 80 is used. If you select HTTPS, the default port 443 is used.
        Notice
        • The port for Websocket is the same as the port for HTTP.
        • The port for Websockets and HTTP/2 is the same as the port for HTTPS.
        You can click Custom to the right of the Server Port parameter to specify one or more custom ports. You can specify multiple custom HTTP or HTTPS ports. If you specify multiple custom ports, separate the ports with commas (,). Take note of the following limits when you specify custom ports:
        • The custom ports that you want to specify must be supported by Anti-DDoS Pro or Anti-DDoS Premium. You can click View optional range to view the HTTP and HTTPS ports that are supported.
          The ports that are supported vary based on the function plan of your Anti-DDoS Pro or Anti-DDoS Premium instance.
          • Anti-DDoS Pro or Anti-DDoS Premium instance of the Standard function plan:
            • HTTP ports: ports 80 and 8080
            • HTTPS ports: ports 443 and 8443
          • Anti-DDoS Pro or Anti-DDoS Premium instance of the Enhanced function plan:
            • HTTP ports: ports that range from 80 to 65535
            • HTTPS ports: ports that range from 80 to 65535
        • You can specify up to 10 custom ports for all websites that are added to your Anti-DDoS Pro or Anti-DDoS Premium instance. The custom ports include HTTP ports and HTTPS ports.

          For example, you want to add Website A and Website B to your Anti-DDoS Pro or Anti-DDoS Premium instance, Website A provides services over HTTP ports, and Website B provides services over HTTPS ports.

          If you specify HTTP ports 80 and 8080 for Website A, you can specify up to eight HTTPS ports for Website B.

        Cname Reuse Specifies whether to enable CNAME reuse. This parameter is available only for Anti-DDoS Premium.

        If more than one website is hosted on the same server, this feature is available. After CNAME reuse is enabled, you need only to map the domain names hosted on the same server to the CNAME that is assigned by Anti-DDoS Premium. For more information, see Use the CNAME reuse feature.

      2. Finish the Complete step.
        You can perform the subsequent operations as instructed based on your business requirements.
        What to do next Reference
        If security software, such as a firewall, is installed on the origin server, you must add the back-to-origin IP addresses of the Anti-DDoS Pro or Anti-DDoS Premium instance to the whitelist of the origin server. This ensures that the traffic from Anti-DDoS Pro or Anti-DDoS Premium is not blocked by the security software on your origin server. Allow back-to-origin IP addresses to access the origin server
        If your origin server is an ECS instance and the origin IP address is exposed, you must change the public IP address of the ECS instance. This prevents attackers from bypassing Anti-DDoS Pro or Anti-DDoS Premium to attack your origin server. Change the public IP address of an ECS origin server
        Anti-DDoS Pro or Anti-DDoS Premium assigns a CNAME to the website that you added. You must change the DNS record to map the domain name to the CNAME. This way, service traffic can be switched to Anti-DDoS Pro or Anti-DDoS Premium for protection. You can manually change the DNS record or use the NS Access Mode feature to enable the system to automatically change the DNS record. Manually change the DNS record

        Enable NS Mode Access to protect a website

    • Import the configurations of more than one website at a time
      1. Click Batch Domains Import below the website list.
      2. In the Add Multiple Rules panel, enter the information about the websites that you want to add and click Next.
        If you want to add the configurations of more than one website at a time, save the configurations in an XML file and import the file. For more information about file formats, see Website configurations in an XML file. Add Multiple Rules panel
      3. In the Import Rule panel, select the websites that you want to add and click OK. After the configurations are imported, close the The rules have been created panel.
  7. Optional:Verify that the website configurations that you added to Anti-DDoS Pro or Anti-DDoS Premium take effect on your computer. If you change the DNS record before the configurations for the website take effect, services may be interrupted. For more information, see Verify the forwarding configurations on your local computer.

What to do next

After you add a website, you must perform the following operations to enable Anti-DDoS Pro or Anti-DDoS Premium to protect the website.

Configuration item Description References
Protection for website services After you add the website, Anti-DDoS Global Mitigation Policies, Intelligent Protection, and Frequency Control are enabled by default. You can enable more features and modify protection rules for the website on the Protection for Website Services tab.
Alert rules in CloudMonitor CloudMonitor allows you to configure threshold-triggered alert rules for common service metrics and attack events of Anti-DDoS Pro or Anti-DDoS Premium. The common service metrics include the volume of traffic for an Anti-DDoS Pro or Anti-DDoS Premium instance and the number of connections for an Anti-DDoS Pro or Anti-DDoS Premium instance. The traffic and connection metrics can be measured at the IP address level. The attack events include blackhole filtering events and traffic scrubbing events. After you configure a threshold-triggered alert rule, CloudMonitor reports an alert when the rule is triggered. This way, you can handle exceptions and recover your business at the earliest opportunity. Create threshold-triggered alert rules in the CloudMonitor console
Log Analysis feature Anti-DDoS Pro or Anti-DDoS Premium collects and stores full logs of the website. This way, you can query and analyze the logs that are collected from the website. By default, the Log Analysis feature stores full logs for 180 days. This helps meet the requirements of classified protection. Quick start