Google Analytics Proxy using Nginx to bypass Adblock and other blockers

Author

This basically proxy all requests to google analytics, including the analytics.js download.
After download analytics.js the content of file is changed by nginx, replacing regular 'www.google-analytics.com' urls to your proxy domain.
So all your requests from your frontend will go to your proxy.
For it works, you just need to replace the redular '//www.google-analytics.com/analytics.js' in the frontend by '//your.domain.com/analytics.js'. Nothing else! Really!

Author

if you are using cloudflare use real ip module to get the ip and set it in proxy query string
http://nginx.org/en/docs/http/ngx_http_realip_module.html

add this lines inside "server" block:

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 104.16.0.0/12;
set_real_ip_from 108.162.192.0/18;
set_real_ip_from 131.0.72.0/22;
set_real_ip_from 141.101.64.0/18;
set_real_ip_from 162.158.0.0/15;
set_real_ip_from 172.64.0.0/13;
set_real_ip_from 173.245.48.0/20;
set_real_ip_from 188.114.96.0/20;
set_real_ip_from 190.93.240.0/20;
set_real_ip_from 197.234.240.0/22;
set_real_ip_from 198.41.128.0/17;
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;
set_real_ip_from 2c0f:f248::/32;
set_real_ip_from 2a06:98c0::/29;

# use any of the following two
real_ip_header CF-Connecting-IP;

and then change the proxy_pass to:
proxy_pass http://www.google-analytics.com/$uri$is_args$args&uip=$remote_addr;

Hi @paivaric,

I checked my configuration several times; I'm pretty sure I didn't make any mistake in following your instructions.

However, I'm getting a lot of these errors:

 upstream timed out (110: Connection timed out) while connecting to upstream,

Does it happen to you too?

Note that I'm not using the userId, nor Cloudflare.

Regards,
Benoit

Nevermind, I found the answer.

For some reason, IPv6 is not working correctly on my box.
Nginx timed out when it used the IPv6 address of www.google-analytics.com.

The solution was to add the following line to the server block:

resolver 8.8.8.8 ipv6=off;

And wait a long time (I would say 10m) until the cache expires.

I found a mistake in the NGINX configuration shown at the top.
It should not be:

proxy_pass http://www.google-analytics.com/;

but it should be:

proxy_pass http://www.google-analytics.com;

It's crucial to remove the trailing slash; otherwise, NGINX drops all the query parameters.

Some adblockers are strict and even block urls like '/r/collect/'
Sot he trick is to replace sub_filter 'r/collect' 'rrr/upstreamer';
then add a block of code

location /rrr/upstreamer/{
        proxy_set_header Accept-Encoding "";
        sub_filter 'www.google-analytics.com'  'subcode.example.com';
        sub_filter_types *;
        sub_filter_once off;
        proxy_pass https://www.google-analytics.com/r/collect;
        break;
    }