1. A firewall test system, comprising: a first test device located on a first side of said firewall, the first test device including: i) a session signal generator for transmitting a communications session initiation signal using an Internet Protocol (IP) address corresponding to said signal source to establish a communications session to be conducted through said firewall; and ii) a probe signal generator for generating test signals at a range of ports in the first side of said firewall through which media signals may be transmitted when said ports are open, said test signals including said IP address; a second test device located on a second side of said firewall, the second test device including: a traffic analyzer for monitoring the second side of said firewall to detect any transmitted test signals that pass through said firewall; and an analysis module for identifying any open ports that are not associated with an established communications session, which passed at least one of said transmitted test signals, as erroneously open ports.