I get 502 error

Hi guys
i have a server in iran … our customer in out of iran connect to our server succesfully …
but one of customer use Cloudflare when he connect to our server dont get reply from us and get 502 error he say connecting to server in localhost work successfully but has error when use cloud fler …
any people know what is problem ? and how to fix it ?


So it is not your site which is behind Cloudflare, but your customer is using Cloudflare’s nameservers?

Can your customer provide you with a screenshot of the error and could he try to check to what your domain name actually resolves for him?

Thats not a DNS issue and not related to

Cloudflare cant reach your server. You need to check why. Your server is possibly down or prevents Cloudflare from reaching it.