A method, apparatus and product that provide a access control system for mobile devices. The mobile device performing: selecting a proxy to handle a request to a remote server, the request is issued by a program being executed by the mobile device, wherein the proxy is configured to perform a security action in response to the request; and sending the request to the proxy; whereby selectively performing the predetermined security action on a portion of the requests issued by the mobile device. Additionally or alternatively, a computer performing: receiving from a mobile device, an instruction to provide a Proxy Auto Config (PAC) file; and generating a PAC file that comprises a function which is configured to receive a URL and return a proxy to handle a request to the URL, wherein the proxy is configured to perform a security action in response to receiving a request.