dmz                                                                                                                                                                                                                                          
     210.x.x.x/24                                                                                                                                                                                                                                                                                                                                     
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                       210.x.x.1                                                                                                                                   210.x.x.2                          
                                                                                                                                                                       210.x.x.20                                                                                                                                                                     
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                             web01                                                                                                                                        web02       
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                       172.x.x.1                                                                                                                                   172.x.x.2          
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                internal                                                                                                                                                                                                                                                                                              
                           172.x.x.x/24                                                                                                                                                                                                                                                                                                               
                                                                                                                                                                   172.x.x.100                                                                                                                                 172.x.x.101                            
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                      db01                                                                                                                                        db02