CF-Connecting-IP:

CF-Connecting-IP:

[1] 要求CF-Connecting-IP: ヘッダーが既に含まれている場合、 CloudFlare逆串403 応答を返すようです。

[404] How does CloudFlare handle HTTP Request headers? – CloudFlare Support ( ( 版)) <https://support.cloudflare.com/hc/en-us/articles/200170986-How-does-CloudFlare-handle-HTTP-Request-headers->