是否可以将通过某个端口进入的ssh请求转发到另一台机器？

I have a small local network. Only one of the machines is available to the outside world (this is not easily changeable). I'd like to be able to set it up such that ssh requests that don't come in on the standard port go to another machine. Is this possible? If so, how?I have a small local network. Only one of the m