The main features of this Business appliance are as follows:

Proxy Engine

• Significantly cheaper than most other web content filtering solutions (one of the best commercial filters).
• Can block adverts by the use of an advert URL block list.
• Can filter text and HTML pages for obscene (sexual, racial, violent, etc) content.
• Uses an advanced phrase weighting system to reduce over or under blocking.
• Can filter sites using the PICS labeling system.
• Can filter according to MIME type and file extension.
• Can filter according to URLs including Regular Expression URLs.
• URL filtering is compatible with black lists.
• The URL filtering is able to filter https requests.
• Can work in a 'whitelist' mode where all sites except those listed are blocked.
• Can block all IP based URLs.
• Is able to block sites when users try using the IP address of the site instead.
• Produces a log in a very human readable format.
• Optionally produces a log in CSV format for east import into databases etc.
• Is able to log the username using either Ident or basic proxy authentication.
• It has the ability to switch off filtering for specified sites, parts of sites, browser IPs and usernames.
• Can block specified source IPs and usernames.
• Can block or limit web uploading (e.g. attachments in Hotmail).
• Has the ability to work in a stealth mode where it logs sites that would have been blocked, but does not block them. This allows you to monitor your users without them knowing.
• Uses a very intelligent algorithm to match phrases in web pages mixed in with HTML code and white space.
• Big5, Unicode and top-bit set characters can be used in search phrases.
• The configuration lists use the same incredibly fast code that allows them all to be hundreds of thousands of entries long.
• Can be made to re-read config files with a HUP signal.
• Supports compressed (Content-Encoding gzip and deflate) HTML.