1. Login to your Cloudflare account
2. Navigate to your domain.
3. IP addresses can be whitelisted on the Security > WAF page:

   
   

4. In the IP Access Rules section enter the first Omnivore IP address into the field as shown below.
5. Make sure you choose the Allow option from the dropdown (this is important).
6. Enter Omnivore in the notes area.
7. Click the Add button.
8. Repeat for our other IP addresses relevant to which Omnivore server your account has been created on.
9. You can find the IP addresses in this article