Get up to 4x the Deep Packet Inspection (DPI) performance in SonicOS 3.9, the latest release for the SonicWALL TZ 180 and TZ 190 Series.  SonicOS 3.9 dramatically improves DPI performance and delivers increased security by utilizing advancements in inspection technology and key optimizations offered in the next generation of SonicWALL's patented "Reassembly Free Deep Packet Inspection" (RFDPI) engine. Now you can scan files of any size without having to choose to either drop large files, or even worse, allow them to enter your network unscanned.  SonicOS Standard and Enhanced 3.9 are available for download now on MySonicWALL to customers with an active support contract.

SonicWALL Product Line Brochure