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server {
    listen 80;
    server_name example.com;

    location /api {
        deny 192.168.0.0/24;
        allow all;
    }

    location / {
        root /var/www/html;
        index index.html;
    }
}

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server {
    listen 80;
    server_name example.com;

    location /api {
        if ($args ~ (?:[^=s&]+)(?:&[^=s&]+)*$) {
            return 403;
        }

        proxy_pass http://backend;
    }

    location / {
        root /var/www/html;
        index index.html;
    }
}

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SecRuleEngine On

SecRequestBodyLimit 13107200
SecRequestBodyInMemoryLimit 13107200
SecRequestBodyNoFilesLimit 13107200
SecRequestBodyAccess On

SecRule REQUEST_METHOD "POST" "id:1,phase:1,t:none,pass,nolog,ctl:requestBodyProcessor=XML"

SecRule REQUEST_HEADERS:Content-Type "application/(?:json|xml)" 
  "id:2,phase:1,t:none,pass,nolog,ctl:requestBodyProcessor=JSON"

SecRule REQUEST_HEADERS:Content-Type "application/x-www-form-urlencoded" 
  "id:3,phase:1,t:none,pass,nolog,ctl:requestBodyProcessor=UTF8"

SecResponseBodyAccess Off

SecDefaultAction "phase:2,log,auditlog,pass"

<LocationMatch "^/api/">
  SecRuleRemoveById 920140
</LocationMatch>

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