Finjan Software's NG-5100 can be deployed as a single box, but the system supports a distributed environment where one appliance serves as a policy server, while others can scan through load balancing. It can sit as either a standard web proxy, in which case you have to reconfigure all client computers, or as a transparent web proxy.
Many companies are looking to secure their networks from wardriving attacks and the current advice is to put a VPN behind a wireless access point. With this in mind, the following product should be ideal. The aim of the product is to secure access to network infrastructure from wireless clients using the wireless transport layer security (WTLS) protocol, which is a wireless version of SSL.
The LogiSense EngageIP Traffic Manager appliance combines the security benefits of firewall and web content filtering with other features that include web caching, routing and bandwidth management, with real-time bandwidth consumption reporting and quality-of- service (QoS) shaping.
The Aladdin eSafe Appliance is a hardened, Linux-based device, which can be configured as an email inspection tool (SMTP relay) and, additionally, as a full content-filtering gateway for HTTP/FTP. To obtain the full content-filtering gateway functionality you need to use Check Point Firewall-1 configured with a HTTP/FTP security server as a content vectoring protocol (CVP) client.