How to block a visitor ipv6 using nginx config file?

@monroe.bahringer 

To block a visitor's IPv6 address using Nginx's configuration file, you can use the ngx_http_geo_module module along with the MaxMind GeoIP database.

Follow these steps:

1. Install MaxMind GeoIP module for Nginx:

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sudo apt-get install libgeoip-dev

1. Download the GeoIP database:

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wget https://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz
gunzip GeoIP.dat.gz

1. Add the following lines to your Nginx configuration file (nginx.conf or inside a specific server block):

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http {
    ...
 
    # Define the GeoIP database
    geoip_country /path/to/your/GeoIP.dat;

    # Create a custom IPv6 blocking map
    map $geoip_country_code $allowed_country {
        default yes;
        XX no; # Replace XX with the two-letter country code you want to block.
    }
 
    server {
        ...
 
        # Block the visitor by IPv6
        if ($allowed_country = no) {
            return 403;
        }
 
        ...
    }
}

1. Replace /path/to/your/GeoIP.dat with the actual path to the downloaded GeoIP database file.
2. Replace XX in the $allowed_country map with the two-letter country code you want to block. For example, replace XX with US to block visitors from the United States.
3. Save the configuration file and restart Nginx for the changes to take effect.

Now, any visitor with an IPv6 address from the blocked country will receive a 403 Forbidden error when trying to access your website.

@monroe.bahringer 

It is important to note that blocking visitors by country using the GeoIP database may not always be accurate and could potentially block legitimate users who are using VPNs or other methods to mask their location. Additionally, the ngx_http_geo_module and GeoIP database may have been deprecated in newer versions of Nginx in favor of the GeoIP2 module.

Here is an updated approach using the GeoIP2 module and database:

1. Install the GeoIP2 module for Nginx:

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sudo apt-get install libmaxminddb-dev
wget https://github.com/leev/ngx_http_geoip2_module/archive/master.zip
unzip master.zip
cd ngx_http_geoip2_module-master
./configure
make
sudo make install

1. Download the GeoLite2 Country database from MaxMind:

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wget https://geolite.maxmind.com/download/geoip/database/GeoLite2-Country.tar.gz
tar -xvzf GeoLite2-Country.tar.gz

1. Add the following lines to your Nginx configuration file:

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http {
    ...
    
    # Define the GeoIP2 database
    geoip2 /path/to/GeoLite2-Country.mmdb {
        $geoip2_data_country_code default=XX source=$geoip2_data_country_code_iso3666 ;
    }

    # Create a custom IPv6 blocking map
    map $geoip2_data_country_code $allowed_country {
        default yes;
        US no; # Replace US with the two-letter country code you want to block.
    }

    server {
        ...
        
        # Block the visitor by IPv6
        if ($allowed_country = no) {
            return 403;
        }

        ...
    }
}

1. Replace /path/to/GeoLite2-Country.mmdb with the actual path to the downloaded GeoLite2 Country database file.
2. Replace US in the $allowed_country map with the two-letter country code you want to block.
3. Save the configuration file and restart Nginx for the changes to take effect.

With this updated approach, Nginx will use the GeoIP2 module and database to block visitors by country based on their IPv6 address accurately.