TLS v1.3 support

Getting advice
1

How can we configure keycloak to support TLS v1.3?

2

I would say you need Java with TLS 1.3 support first and then it should be running without any special Keycloak configuration.

3

Thanks for your comment on it.
I am running java with following version:

I have no name!@8f1e7925cb67:/$ java --version
openjdk 11.0.14 2022-01-18 LTS
OpenJDK Runtime Environment (build 11.0.14+9-LTS)
OpenJDK 64-Bit Server VM (build 11.0.14+9-LTS, mixed mode)

Could you suggest how can we check the support or whicj java verson is required for that.
Really appriciate you response.

Thank you

4 
$ cat ShowTlsVersions.java
import javax.net.ssl.SSLContext;

public class ShowTlsVersions {
    public static void main(String[] args) {
      try {
        System.out.println(String.join(" ", SSLContext.getDefault().getSupportedSSLParameters().getProtocols()));
      } catch (Exception e) {
        System.out.println(e.getMessage());
      }
    }
}

$ java ShowTlsVersions.java
TLSv1.3 TLSv1.2 TLSv1.1 TLSv1 SSLv3 SSLv2Hello

$ java -version
openjdk version "11.0.14.1" 2022-02-08
OpenJDK Runtime Environment (build 11.0.14.1+1-Ubuntu-0ubuntu1.20.04)
OpenJDK 64-Bit Server VM (build 11.0.14.1+1-Ubuntu-0ubuntu1.20.04, mixed mode, sharing)

Of course if Keycloak is behind loadbalancer, reverse proxy then they should handle TLS.