When an expanded application (AP) is installed, an information processing apparatus analyzes port control information relating to a unique port to be used by the expanded AP and edits policy setting items including existing policy setting items based on the port control information. Then, the information processing apparatus receives setting input via the edited policy setting items and generates setting information. The information processing apparatus applies a filtering rule to a firewall (FW) unit according to the setting information, whereby the security is maintained in the case where the expanded AP is installed.