I am trying Cloudflare for my web application la3yunak.com, but I keep getting 503 service unavailable. when I disable Cloudflare proxy everything works fine. However, I notice and odd certificate that is used to secure my connection when enabling Cloudflare proxy, this certificate is neither the edge certificate used on Cloudflare proxy, nor the one at my origin server. This certificate shows even if I disabled SSL/TLS encryption mode to Off.
Also, I couldn’t find any logs on my origin server from Cloudflare servers, but it is important to note that my origin server hosts multiple applications and uses Nginx as reverse proxy.
You actually need to contact Shopify Support about this. The act of “removing” the domain from their system doesn’t actually translate, at least in some cases (to be very polite to them), to actually removing their config which means that Cloudflare still thinks they are the owners of the domain.
Cloudflare is working on a fix to prevent this from happening, but in the mean time…