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VPS / VDS hosting >  Protecting nginx from Flood attacks

Configuring nginx can significantly reduce the load and protect the site from unwanted bots. 

We set a limit of 250 connections in 1 second from one ip address

http section

limit_conn_zone $binary_remote_addr zone=addr:10m;
limit_conn_zone $server_name zone=servers:10m;
limit_req_zone $binary_remote_addr zone=one:10m rate=250r/s;

server section

        location / {
            limit_req zone=one;

Channel bandwidth exhaustion protection.

This rule after downloading the first 10 megabytes will reduce the download speed to 512 kb/s for this client (ip).

http section

limit_rate_after 10240k;
limit_rate 512K;

You can also limit channel bandwidth in the ddos deflate settings.

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