Add a prefix

To add a prefix to Advanced DDoS Protection:

1. In the Cloudflare dashboard, go to the L3/4 DDoS protection page.

   Go to DDoS Managed Rules

2. Go to Advanced Protection.

3. Under General settings > Prefixes, select Edit.

4. Expand the Add existing prefix section and select Add next to the prefix you wish to add.
   Alternatively, enter a prefix and (optionally) a description in Prefix and Description, respectively, and select Add.

Note

The Add existing prefix list will not display leased prefixes, but you can add them manually in the Cloudflare dashboard or using the API. You cannot add delegated prefixes to Advanced TCP Protection.