A mobile ad-hoc network, hereinafter referred to as MANET comprising: a plurality of nodes (11, 12) configured to transmit data therebetween using a media access layer, hereinafter referred to as MAC, each of said nodes having a respective MAC address associated therewith; and a dedicated policing node configured to detect intrusions into the MANET by monitoring transmissions among said plurality of nodes to detect at least one of: (a) frame check sequence, hereinafter referred to as FCS, errors from a MAC address and generate an intrusion alert based upon the detected number of FCS errors for the MAC address exceeding a threshold; (b) failed attempts to authenticate MAC addresses and generate an intrusion alert based upon the detected number exceeding a threshold of failed attempts to authenticate a MAC address; (c) service set IDs associated with the MANET and generate an intrusion alert based upon one of the detected service set IDs being different than the service set ID of the wireless network; (d) an illegal network allocation vector, hereinafter referred to as NAV, value the NAV value indicating a time duration reserved for transmitting the data generated from request to send and clear to send packets transmitted among said plurality of nodes prior to transmitting data forming and generate an intrusion alert based upon the detected illegal NAV value; (e) contention-free mode operation by said plurality of nodes outside of contention periods, hereinafter referred to as CFPs and generate an intrusion alert based upon the detected contention mode operation during a CFP; and (f) contention mode operation during a CFP and generate an intrusion alert based upon the detected contention-free mode operation outside a CFP. a plurality of nodes (11, 12) configured to transmit data therebetween using a media access layer, hereinafter referred to as MAC, each of said nodes having a respective MAC address associated therewith; and a dedicated policing node configured to detect intrusions into the MANET by monitoring transmissions among said plurality of nodes to detect at least one of: (a) frame check sequence, hereinafter referred to as FCS, errors from a MAC address and generate an intrusion alert based upon the detected number of FCS errors for the MAC address exceeding a threshold; (b) failed attempts to authenticate MAC addresses and generate an intrusion alert based upon the detected number exceeding a threshold of failed attempts to authenticate a MAC address; (c) service set IDs associated with the MANET and generate an intrusion alert based upon one of the detected service set IDs being different than the service set ID of the wireless network; (d) an illegal network allocation vector, hereinafter referred to as NAV, value the NAV value indicating a time duration reserved for transmitting the data generated from request to send and clear to send packets transmitted among said plurality of nodes prior to transmitting data forming and generate an intrusion alert based upon the detected illegal NAV value; (e) contention-free mode operation by said plurality of nodes outside of contention periods, hereinafter referred to as CFPs and generate an intrusion alert based upon the detected contention mode operation during a CFP; and (f) contention mode operation during a CFP and generate an intrusion alert based upon the detected contention-free mode operation outside a CFP. (a) frame check sequence, hereinafter referred to as FCS, errors from a MAC address and generate an intrusion alert based upon the detected number of FCS errors for the MAC address exceeding a threshold; (b) failed attempts to authenticate MAC addresses and generate an intrusion alert based upon the detected number exceeding a threshold of failed attempts to authenticate a MAC address; (c) service set IDs associated with the MANET and generate an intrusion alert based upon one of the detected service set IDs being different than the service set ID of the wireless network; (d) an illegal network allocation vector, hereinafter referred to as NAV, value the NAV value indicating a time duration reserved for transmitting the data generated from request to send and clear to send packets transmitted among said plurality of nodes prior to transmitting data forming and generate an intrusion alert based upon the detected illegal NAV value; (e) contention-free mode operation by said plurality of nodes outside of contention periods, hereinafter referred to as CFPs and generate an intrusion alert based upon the detected contention mode operation during a CFP; and (f) contention mode operation during a CFP and generate an intrusion alert based upon the detected contention-free mode operation outside a CFP.