You can purchase exclusive IP addresses for Web Application Firewall (WAF) to protect important domain names. Each exclusive IP address protects one domain name. A domain name that is protected by an exclusive IP address can be accessed even if other domain names in the same WAF instance are under DDoS attacks. The other domain names use a shared IP address.
Introduction to exclusive IP addresses
If a domain name is under DDoS attacks, the exclusive IP address that protects the domain name can also help prevent other domain names in the same WAF instance from access failures. By default, a WAF instance uses a shared IP address to protect all domain names. If traffic of this shared IP address is routed to a blackhole due to DDoS attacks on one of the domain names, the other domain names cannot be accessed. In the preceding situation, we recommend that you purchase exclusive IP addresses to protect important domain names from access failures.
Purchase an exclusive IP address
Assign and enable an exclusive IP address
Log on to the WAF console. In the left-side navigation page, choose . On the page that appears, set Protection Resource to Shared Cluster and Exclusive IP in the Quick Access column.