A method and system for controlling a firewall for a user computer system. One or more processors of the user computer system receive a control request to control a program of the user computer system by the firewall. The control request includes a condition pertaining to at least one process of a remote computer system. The at least one process is configured to be executed on the remote computer system. The firewall protects the user computer system from external threats. The processors store a remote system condition associated with the program of the user computer system. The remote system condition includes the condition pertaining to the at least one process. The processors ascertain whether the remote system condition is satisfied. The processors direct the firewall to block or allow the transmission of data if it is ascertained that the remote system condition is not satisfied or satisfied, respectively.