The basic appliance supports up to ten users simultaneously accessing the Internet but unlike the Firebox X15w it is not upgradeable. If you think that more than ten people will want to get online you'll should go for the TZ 170. The TZ 150 does at least have a host of optional features that you can add with SonicWALL's Security Gateway Suite costing £190, with some features unique to SonicWall.

Note that this is an annual fee but for this extra outlay you get hosted web content filtering, gateway anti-virus services, anti-spyware, intrusion detection and prevention and the use of SonicWALL's Viewpoint reporting software



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