Java back-end check IP and block

Question

I have REST API. Front Vue and back Java + Spring. Where I can find any example how to check IP address of request for my login page to make it save? I need to block IP address on Back End if there was 10 wrong attepts of login, for example.

Thanks to all in future, for any kind of help!

Answer 1

Take a look at this code.

String remoteAddr = "";
        if (request != null) {
            remoteAddr = request.getHeader("X-FORWARDED-FOR");
            if (remoteAddr == null || "".equals(remoteAddr)) {
                remoteAddr = request.getRemoteAddr();
            }
        }

You can find the IP address from your request object into your Rest API.