ipvsadm + nginx for rdp
nginx conf

worker_processes 2;
error_log /var/log/nginx/error.log;

events {
    worker_connections 16384;
}

stream {
error_log /var/log/nginx/stream_error_rdp.log;
upstream backend{
    server 10.0.0.2:443;
# weight=4 max_fails=1; #fail_timeout=20;
}

server{
    listen 443;
    proxy_pass backend;
}
}

ipvsadm understandable