Although Trend Micro recommends that you schedule IWSVA to perform automatic updates
               of the scan engine, you can do it manually, as shown below.
            
               - 
                  
                  Download the latest scan engine from the Trend Micro Web site. Enter the following search criteria: 
                     - 
                        
                        Category: Internet Gateway 
- 
                        
                        Product: InterScan Web Security Virtual Appliance 
- 
                        
                        Version: Current product version 
- 
                        
                        Download Types: No selection 
 
- 
                  
                  Extract the contents of the vsapi-x86-linux-#.###-####.tar.Z file to a temporary directory. 
- 
                  
                  Stop the IWSVA HTTP and FTP daemons from the Management Console.  Go to the Summary page and simply turn off and on the HTTP(S) Traffic and FTP Traffic links. 
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                  Back up the following scan engine files:  /etc/iscan/lib/libvsapi.so 
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                  Extract the new scan engine files from their temp directory to the following:  /usr/iwss/lib/libvsapi.so 
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                  Ensure the permission is the same as the original engine:  rwxr_xr_x iscan iscan libvsapi.so 
- 
                  
                  Stop and restart HTTP using the following commands:  /etc/iscan/S99ISproxy stop  /etc/iscan/S99ISproxy start 
- 
                  
                  Stop and restart FTP using the following commands:  /etc/iscan/S99ISftp stop  /etc/iscan/S99ISftp start