A cellular mobile device comprising: a transmitter and receiver to send and receive cellular communications in the form of radio frequency signals; a microprocessor; an operating system configured to execute on the microprocessor to provide an operating environment of application software; a multi-service virtual private network, "VPN", client registered with the operating system as a single application, wherein the multi-service network client comprises: a security manager integrated within the VPN client to apply at least one security service to network packets; a VPN handler having an interface to exchange the network packets with the security manager for application of the security service, wherein the VPN handler is operable in an enterprise mode and in a non-enterprise mode and configurable to operate in one of the enterprise mode and the non-enterprise mode, wherein in the enterprise mode the VPN handler is configured to establish a VPN connection with a remote VPN security device and to provide encryption services to securely tunnel the network packets between the cellular mobile device and the remote VPN security device, and wherein in the non-enterprise mode the VPN handler is configured to direct the network packets to the security manager without application of the encryption services and to communicate the network packets to a packet-based network without tunneling the packets; and a VPN control application configured to provide a unified user interface that allows a user to configure both the VPN handler, and anti-virus settings and personal firewall settings of the security manager of the multi-service VPN client. a transmitter and receiver to send and receive cellular communications in the form of radio frequency signals; a microprocessor; an operating system configured to execute on the microprocessor to provide an operating environment of application software; a multi-service virtual private network, "VPN", client registered with the operating system as a single application, wherein the multi-service network client comprises: a security manager integrated within the VPN client to apply at least one security service to network packets; a VPN handler having an interface to exchange the network packets with the security manager for application of the security service, wherein the VPN handler is operable in an enterprise mode and in a non-enterprise mode and configurable to operate in one of the enterprise mode and the non-enterprise mode, wherein in the enterprise mode the VPN handler is configured to establish a VPN connection with a remote VPN security device and to provide encryption services to securely tunnel the network packets between the cellular mobile device and the remote VPN security device, and wherein in the non-enterprise mode the VPN handler is configured to direct the network packets to the security manager without application of the encryption services and to communicate the network packets to a packet-based network without tunneling the packets; and a VPN control application configured to provide a unified user interface that allows a user to configure both the VPN handler, and anti-virus settings and personal firewall settings of the security manager of the multi-service VPN client. a security manager integrated within the VPN client to apply at least one security service to network packets; a VPN handler having an interface to exchange the network packets with the security manager for application of the security service, wherein the VPN handler is operable in an enterprise mode and in a non-enterprise mode and configurable to operate in one of the enterprise mode and the non-enterprise mode, wherein in the enterprise mode the VPN handler is configured to establish a VPN connection with a remote VPN security device and to provide encryption services to securely tunnel the network packets between the cellular mobile device and the remote VPN security device, and wherein in the non-enterprise mode the VPN handler is configured to direct the network packets to the security manager without application of the encryption services and to communicate the network packets to a packet-based network without tunneling the packets; and a VPN control application configured to provide a unified user interface that allows a user to configure both the VPN handler, and anti-virus settings and personal firewall settings of the security manager of the multi-service VPN client.