CTG needs to be made aware of the Enterprise Server instance hosting the CICS server programs. 
                  	  
               
            
 
            	 
            You can either provide CTG with the information it requires by editing the CTG configuration file 
               		ctg.ini (or 
               		cicscli.ini for Universal Client) or, as we do here, use the CTG configuration tool. 
               	 
            
 
            	 
            
               -  
                  		  Start the CTG configuration tool by clicking 
                  			 Start > All Programs > IBM CICS Transaction Gateway, then right-click 
                  			 Configuration Tool and select 
                  			 Run as administrator. 
                  		   
                  		
               
-  
                  		  Click 
                  			 Options > New Server. 
                  		   
                  		
               
-  
                  		  Complete the following information: 
                  		   
                  		    
                  			 
                   
                     				
                     - Server name: a name for the server - in this case use CTGDEMO. 
                        				
                     
- Description: an optional description for the server, in this case enter: 
                        				  CTG demo server. 
                        				
                     
- Network protocol: ensure that TCP/IP is selected. 
                        				
                     
- Initial transaction: leave blank. 
                        				
                     
- Model terminal definition: leave blank. 
                        				
                     
- *Host name or IP address: enter 
                        				  127.0.0.1 for this simple walkthrough. 
                        				
                     
- Port: enter 
                        				  1435. This is the port number to listen on, which must be the same as the port number you specify for the Enterprise Server listener
                        later. The port number 
                        				  1435 is the IANA recognized port number for IBM CICS. 
                        				
                     
 Leave all other fields at their default values.
-  
                  		  Click 
                  			 File > Save As and ensure you save the file as 
                  			 ctg.ini in the relevant IBM CICS Transaction Gateway data directory. On the machine on which this demonstration was developed, this
                  was: 
                  			 C:\ProgramData\IBM\CICS Transaction Gateway\ctg.ini but it may differ in your environment. 
                  		   
                  		
               
-  
                  		  Click 
                  			 File > Exit to close the CTG configuration tool.