CCC                                                                                                                   
                                  192.168.2.x/24                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                           192.168.2.12x                                            
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                 NAT
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                               192.168.1.22x                                                        
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                 AAA                                                                                                                                
     192.168.1.x/24                                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                          192.168.1.20x                                                             
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                           RRR      
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                        192.168.3.1x                                
                                                                                                                                                                                                                                                                                                    
                                                                                                                                                                            BBB                                                                                                                     
                                                   192.168.3.x/24