General Settings

Enable Rule    
Rule Name  

  Mapping Rule

Incoming Interface  
Original IP  
   User-Defined Original IP  (IP Address)  
Mapped IP  
   User-Defined Mapped IP  (IP Address)  
Port Mapping Type  

  Related Settings

Add corresponding Policy Route rule for NAT 1:1 mapping.
Add corresponding Policy Route rule for NAT Loopback.
Configure  Firewall