The Static Route page is also different from the manual.
Under "Routing Table" and "Interface" I have the options I attached. How does it works? What's the meaning of "Routing Table MAIN or WAN"?
However, i configured within the Server, the static route you can see in the pasted image.
In the Client I inserted the following:
Routing Table Interface Destination Address Netmask Gateway
WAN LAN 192.168.1.0 255.255.255.0 192.168.0.20
"Server Laptop" pings everything, so also "Client Laptop".
"Client Laptop" does not ping "Server Laptop" and "Server LAN IP".