This chapter explains how to use webMethods Broker client groups to assign default properties to Broker clients, and describes the various settings for these properties. The chapter also describes the security features associated with client groups, such as Access Control Lists (ACLs) and SSL encryption, and describes the key procedures for configuring and managing client groups, such as how to create a client group, configure its publish and subscribe permissions, edit its properties, and copy client groups from one Broker to another.