ServerSocket is used to issue an RPC that uses the scheduler direct facility or the name service or an RPC with a communication destination specified in conjunction with TP1/Client/J. To apply the security manager to the Java VM on which a client program using TP1/Client/J is running, specify appropriate permissions to the security policy file so that the class library of TP1/Client/J can use the ServerSocket functions (connect, listen, and accept). In the case of Java servlets and EJB, some application server products with these containers may be using the security manager by default for security purposes. Check the specifications of the application server you are using and specify appropriate permissions.