Use the Networks page of the file system discovery task wizard to define where to run the discovery task.
        
Steps
- By default, discovery runs on no computers or networks. Click Edit to select the computers and networks to scan.
                
                    Note: If you choose network objects larger than 65536 potential addresses (larger than a class C subnet), you are warned and prompted to confirm. 
 
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                To use a port other than the default Windows port, click Advanced, then enter one or more port numbers (use commas to separate multiple values).
                
                    Use this option, for example, to run a discovery task on a Linux/UNIX NFS server or a Novell file server. 
 
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                Click Next, then continue with File System Discovery Task Wizard - Scanned Folders.