NGINX – allow IP range – invalid parameter

In order to allow range of IPs in NGINX, I add this row to my nginx configuration, in server declarative:

allow 165.165.165.0/255;

deny all;

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When I test this modification (by sudo nginx -c /etc/nginx/nginx.conf -t) I got this error:

nginx: [emerg] invalid parameter "165.165.165.0/255" in
/etc/nginx/default.d/server.conf:1

What wrong?

Thanks

>Solution :

The error in your NGINX configuration is due to an incorrect IP range format. Use CIDR notation instead:

Replace allow 165.165.165.0/255; with allow 165.165.165.0/24;.

You can test the configuration again with sudo nginx -t and reload NGINX if successful.