I have set up a few websites on the same server, and I’m using Cloudflare for them.
When I send a HTTP request directly to the server for each site (bypassing Cloudflare), I get a HTTP Response Header that looks like this:
HTTP/1.1 200 OK
Date: Sun, 30 Aug 2020 17:04:41 GMT
Server: Apache
Content-Type: text/html; charset=UTF-8
However, for one of the sites, when sending the request via Cloudflare I’m getting this response header:
HTTP/1.1 200 OK
Date: Sun, 30 Aug 2020 17:11:55 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Set-Cookie: __cfduid=d676bed8f2a415f6f41de462c87491dd61598807515; expires=Tue, 29-Sep-20 17:11:55 GMT; path=/; domain=.domain.com; HttpOnly; SameSite=Lax
CF-Cache-Status: DYNAMIC
cf-request-id: 04e1f3baa30000063dbd996200000001
Server: cloudflare
CF-RAY: 5cb0223ddfab063d-LHR
All of the other sites keep the same headers as before. It’s just this one that’s getting the extra HTTP headers added by Cloudflare.
What would cause Cloudflare to add these headers to the response?