how does x-real-ip or CF-Connecting-IP work

I have a woerk set up with this code

// index.js
var ip_default = {
  async fetch(request) {
    return new Response(request.headers.get("x-real-ip"));
  }
};
export {
  ip_default as default
};
//# sourceMappingURL=index.js.map

// index.js
var ip_default = {
  async fetch(request) {
    return new Response(request.headers.get("x-real-ip"));
  }
};
export {
  ip_default as default
};
//# sourceMappingURL=index.js.map

i've tried my worker with both x-real-ip and CF-Connecting-IP but both are returning ipv6 addresses. i am building a dynamic dns solution so my worker was going to be pinged by my raspberrypi every 5 or so minutes and update the dns entry. i can obviously add an AAAA record with this, but I would like to grab the ipv4 address so i can use it for firewall rules. : ) is there a way to get the ipv4 address instead?

2 Replies

Cyb3r-Jak3•13mo ago

It all depends on the client. If the client connects via IPv6 then you’ll see the ipv6. You’d have to force the client to connect via ipv4

que curvero noches perraOP•13mo ago

Thank you, I used curl so:

curl -4 -H "CF-Access-Client-Id: your_client_id" -H "CF-Access-Client-Secret: your_client_secret" https://domain.com/worker

curl -4 -H "CF-Access-Client-Id: your_client_id" -H "CF-Access-Client-Secret: your_client_secret" https://domain.com/worker

to hit it behind zero trust. thanks!

Gaming

Programming

how does x-real-ip or CF-Connecting-IP work