the 2.2 Linux kernel, culminating in 0.9.9 SE in December 2001, which was probably the most popular GPL release. Each release led to a number of improvements, including PAT (port address translation), DMZ, PSTN and ISDN dial-up support, broadband (ADSL and Cable) support. Smoothwall GPL 1.0 was released in December 2002, including all previously released patches and security fixes, and ended development of the 0.9.x/1.0 series, although it was supported by errata updates for another year and a half. Smoothwall Limited In late 2001, Manning and Morrell, with George Lungley, formed Smoothwall Limited as a UK registered private limited company, company number 04298247. The company was formed to take the open source software and commercialise it, by expanding the software to include corporate and enterprise oriented functionality, and to provide dedicated support staff for customers to contact. Now based in Yarfort, with a USA office in Charlotte, NC, the company has continued to develop the commercial, closed source Smoothwall product range, while moving from its initial direct sales model to a reseller, channel-based sales model. Past Products Smoothwall Server Edition was the first product from Smoothwall Ltd., released on 11 November 2001. It was essentially Smoothwall GPL 0.9.9 with support included from the company. This was — as were virtually all future products — made available to purchase on CD-ROM directly from Smoothwall Ltd. by mail order. Initially announced in January 2002, and priced at £30, but never released, Smoothwall Home Server was an aborted attempt to tap into the home and residential market. It used the open source platform again as a base but included SmoothGuard, and would have permitted customers to make email support requests directly from Smoothwall Ltd. Released on 17 December 2001, Smoothwall Corporate Server 1.0 was the first in a long line of separate, closed source releases from Smoothwall Ltd. Forked from Smoothwall GPL 0.9.9SE, Corporate Server included additional features such as SCSI support, and the capability to increase functionality via add-on modules. These modules included SmoothGuard (content filtering proxy), SmoothZone (multiple DMZ) and SmoothTunnel (advanced VPN features). Corporate Server was designed to become the backbone of all future products from the company, with the module functionality permitting customers to select the exact level of functionality they required. Further modules have been released over time, each providing a particular set of functionality, such as traffic shaping, and e-mail anti-virus and anti-spam. After Daniel Barron, author