Help setting up a second nat on RouterBoard

Question

PHP

Hello dear.
There is a RouterBoard RB951G ...
There is an honest IP, hanging in the vlan and private for accessing private networks located outside.
On an honest nat, the flight was hung up - the Internet works through it. But for private addresses I can not create nat.
It looks like this and, as you can see from the pings, it does not work.

Packets do not even get into nat - what did I not take into account?

Answer 1

As a result, he did. It seems to work.