nginx and cloudlfare ip confusion?

Question

I am using the below config in http block of my nginx.conf to get real ip while using Cloudflare acceleration service:

    ## Cloudflare settings to get Real IP's
    set_real_ip_from   204.93.240.0/24;
    set_real_ip_from   204.93.177.0/24;
    set_real_ip_from   199.27.128.0/21;
    set_real_ip_from   173.245.48.0/20;
    set_real_ip_from   103.21.244.0/22;
    set_real_ip_from   103.22.200.0/22;
    set_real_ip_from   103.31.4.0/22;
    set_real_ip_from   141.101.64.0/18;
    set_real_ip_from   108.162.192.0/18;
    set_real_ip_from   190.93.240.0/20;
    set_real_ip_from   188.114.96.0/20;   
    set_real_ip_from   197.234.240.0/22;
    set_real_ip_from   198.41.128.0/17;
    set_real_ip_from   162.158.0.0/15;
    set_real_ip_from   2400:cb00::/32;
    set_real_ip_from   2606:4700::/32;
    set_real_ip_from   2803:f800::/32;
    set_real_ip_from   2405:b500::/32;
    set_real_ip_from   2405:8100::/32;
    real_ip_header     CF-Connecting-IP;

I am also using nginx rate limiting feature defined below the above config as:

limit_conn_zone $binary_remote_addr zone=two:30m;

Which is being enforced by limit_conn two 16; directive in php location block inside the 'default' file at /etc/nginx/sites-enabled.

My question is, is this correct and will it NOT throttle and block Cloudflare IP's?

score 0 · Answer 1 · answered Jun 15 '15 at 19:54

Based on my own experience (I also use Nginx with CloudFlare) and a quote from the documentation I can tell that it is indeed correct and CloudFlare IPs won't be throttled or blocked.

The ngx_http_realip_module module is used to change the client address

nginx and cloudlfare ip confusion?

1 Answers1