If your environment is closed or you prefer to update default exclusions manually, you can download the default exclusions database from www.MySonicWall.com and then import them.
To update default exclusions manually
Scroll to the Update Default Exclusions Manually section.
Click IMPORT EXCLUSIONS.
Click Import.
The Common Name Exclusions/Inclusions table and the status of the default database used by the firewall in the DPI-SSL Default Exclusions Status section are updated.