SonicWALL™ NSA 250M and 250M Wireless-N high-performance, modular Next-Generation Firewalls offer branch offices and distributed enterprises in-depth frontline security, application and user control, network productivity and optional 802.11 dual-band wireless. The NSA 250M acts as the first line of network defense against viruses, Trojans, key-loggers and other application layer attacks, without compromising network performance.