 Paxfire provides an appliance called the Paxfire Lookup Engines (PLE) to internet service providers (ISPs) as a method of generating additional revenue through advertising based on mistyped URLs.By using the Paxfire service, an ISP can redirect mistyped web queries from its clients to navigation pages that may contain paid advertising sources.If a user clicks on a sponsored link, Paxfire and the ISP share the revenue.