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IPv4 header to requests when a client is using IPv6

 

What is Pseudo IPv4?

As a stopgap to accelerate the adoption of IPv6, Cloudflare offers Pseudo IPv4 which supports IPv6 addresses in legacy applications expecting IPv4 addresses. The goal is to provide a nearly unique IPv4 address for each IPv6 address, using Class E IPv4 address space, which is designated as experimental and would not normally see traffic. To learn more see here.

Options

  • Add header: Add additional Cf-Pseudo-IPv4 header only
  • Overwrite headers: Overwrite the existing Cf-Connecting-IP and X-Forwarded-For headers with a pseudo IPv4 address

Cloudflare

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