Vulnerabilities in Automatic Allocation of Multicast Addresses: This is an attempt to locate the Multicast Address Dynamic Client Allocation Protocol (MADCAP) server insecurely before operating in Zeroconf mode allowing an attacker to disable or disrupt the normal function of the Zeroconf protocol. Furthermore, transmission of false messages can also occur. A malicious peer can send false Address Space Announce (ASA) message indicating that no addresses are available. This can lead to serious problems including: (a) denial of service after the Multicast Address Allocation Server (MAAS) cannot allocate addresses to authorized users; (b) hijacking of addresses since the MAAS, after receiving the false information (ASA message indicating that no addresses are available) will allocate addresses that are already in use by other entities in the domain.