By default, when security services enabled SonicWall inspects only inbound traffic coming from outside. If admin wants to inspect the outbound traffic from the local network to the internet he needs to configure it manually. This article explained how to configure Security Services like GAV or Anti spyware for outbound inspection.
Resolution for SonicOS 6.5
This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.
This article illustrates the configuration of the SonicWall security services to inspect the outbound traffic through Gateway Anti-Virus (GAV) and Anti Spyware.
Login to the SonicWall Management page.
Navigate to theManage | Security Services | Gateway Anti-Viruspage.
Select "Enable Gateway Anti-Virus" check box if it's not already enable.