CF Geo Plugin supports PROXY connection for the lookup. This option is only used if your site is on a server whose IP address is in the private web or blacklisted for the some reason.
If your server’s IP address is in a global blacklist, you are not able to receive geo information from our API.
This is usually good if you use some Onion domain or you are a general user of the private web and all your websites are in the private networks.
Because of this, APi will not work properly and you need to use a public PROXY server so that our API can verify and send information.