Abstract: A firewall controls connection to a network to allow the user to selectively access at least one service over the network, where the or each service requires connection resources defined by connection parameters. A user interface allows a user to select at least one service and to select to enable or disable the or each selected service. Connection parameters to be enabled or disabled are determined based on the user selection and predetermined connection parameters for the or each service. Access to the or each selected service is controlled based on the determined connection parameters.