Nginx Limit per ip

Hi

Is this edit enough to limit connections per ip on the server in general and not per domain only?
edit usr/local/nginx/conf/nginx.conf

add under this:
large_client_header_buffers 4 256k;

this:
limit_conn limit_per_ip 80;
limit_conn_zone limit_per_ip $binary_remote_addr 16m;

restart nginx

I want to limit per ip 80 connections.

Thanks !!!

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I was read also that recommendation from user floren so maybe he knows to help

Thanks George