Kibana4 nginx prefixed path

default

  location ~* /kb4/.* {
        rewrite ^/kb4/(.*) /$1 break;
            proxy_pass http://127.0.0.1:5601;
            proxy_set_header Host $host;
            proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_send_timeout 600s;
        proxy_read_timeout 600s;
  }

Had to switch to regular expressions for config to correctly handle underscore in location by nginx.