nginx with proxy protocol , ssl handshake failed

Hello everyone ,

I have a nginx webserver behind DO Loadbalance I have around 12 domains in my webserver some domains direct to Loadbalnce’s IP directly and other redirect to it via cloudflare recently I faced a problem to get client’s Real IP for domain that redirect to the server directly without cloudflare .

I search on this issue and I found that I have to enable Proxy Protocol on the LoadBalance then I have to configure the nginx to accept Proxy Protocol

I follow this tutorial

https://docs.nginx.com/nginx/admin-guide/load-balancer/using-proxy-protocol/#configuring-nginx-to-accept-the-proxy-protocol

and I got it done .

but if I add this directive to domain’s nginx configure files

listen 80 proxy_protocol;

all other domains on cloudflare got error ssl handshake failed and not working

how to get proxy_protocol directive work without effect on other domains ?

thank you so much .