If users deploy a client-side firewall, they must set the firewall to allow the iFolder client to communicate locally (on the same computer) with Mono XSP Server. iFolder communicates to Mono XSP Web services, which communicates, in turn, with the iFolder enterprise server via HTTP BASIC or SSL, as governed by the system settings for the iFolder enterprise server. The user can allow iFolder to choose a local dynamic port for local iFolder traffic, or configure a local static port for iFolder to use for that purpose.