access RB be hide natter RB?

Hi there,

I was just wondering if there was any way to access a RB be hide another RB using winbox from the outside of RB1; without setting the firewall forwarding ports.

For example:
ISP connection > RB1 (ip: 10.10.10.10) > local network RB 2 (ip 192.168.0.1) .

telnet from first to second.