1. Login to your Cloudflare account
  2. Navigate to your domain.
  3. Click on Firewall in the navigation, then Tools
  4. In the IP Access Rules section enter the first eBayLink IP address into the field as shown below.
  5. Make sure you choose the Allow option from the dropdown (this is important).
  6. Enter eBayLink in the notes area.
  7. Click the Add button.
  8. Repeat for our other eBayLink IP addresses.
  9. You can find the IP addresses in this article