A system for granting or denying access to nodes on a network, includes a first node including a list of nodes that can be granted or denied access to the first node, and at least one other node. The first node and the at least one other node are connected across the network. When the at least one other node attempts to gain access to the first node, the first node reviews the list of nodes to determine whether access should be granted or denied to the at least one other node.