If you start the Network Server without specifying a security manager, the Network Server will install a default Java security manager that enforces a basic policy.
Note that the Network Server attempts to install a security manager only if you boot the server as the entry point of your VM. The Network Server will not attempt to install a security manager if you start the server from your application using the programmatic API described in "Starting the Network Server from a Java application" in the Derby Server and Administration Guide.
The following is a copy of the basic policy:
// This template policy file gives examples of how to configure the // permissions needed to run a Derby network server with the Java // Security manager. // grant codeBase "${derby.install.url}derby.jar" { // These permissions are needed for everyday, embedded Derby usage. // permission java.lang.RuntimePermission "createClassLoader"; permission java.util.PropertyPermission "derby.*", "read"; permission java.util.PropertyPermission "user.dir", "read"; permission org.apache.derby.security.SystemPermission "engine", "usederbyinternals"; // The next two properties are used to determine if the VM is 32 or 64 // bit. // permission java.util.PropertyPermission "sun.arch.data.model", "read"; permission java.util.PropertyPermission "os.arch", "read"; permission java.io.FilePermission "${derby.system.home}","read"; permission java.io.FilePermission "${derby.system.home}${/}-", "read,write,delete"; // This permission lets a DBA reload the policy file while the server // is still running. The policy file is reloaded by invoking the // SYSCS_UTIL.SYSCS_RELOAD_SECURITY_POLICY() system procedure. // permission java.security.SecurityPermission "getPolicy"; // This permission lets you backup and restore databases // to and from arbitrary locations in your file system. // // This permission also lets you import/export data to and from // arbitrary locations in your file system. // // You may want to restrict this access to specific directories. // permission java.io.FilePermission "<<ALL FILES>>", "read,write,delete"; // Permissions needed for JMX based management and monitoring. // // Allows this code to create an MBeanServer: // permission javax.management.MBeanServerPermission "createMBeanServer"; // // Allows access to Derby's built-in MBeans, within the domain // org.apache.derby. // Derby must be allowed to register and unregister these MBeans. // It is possible to allow access only to specific MBeans, attributes // or operations. To fine tune this permission, see the javadoc of // javax.management.MBeanPermission or the JMX Instrumentation and // Agent Specification. // permission javax.management.MBeanPermission "org.apache.derby.*#[org.apache.derby:*]", "registerMBean,unregisterMBean"; // // Trusts Derby code to be a source of MBeans and to register these in // the MBean server. // permission javax.management.MBeanTrustPermission "register"; // getProtectionDomain is an optional permission needed for printing // classpath information to derby.log // permission java.lang.RuntimePermission "getProtectionDomain"; // The following permission must be granted for // Connection.abort(Executor) to work. Note that this permission // must also be granted to outer (application) code domains. // permission java.sql.SQLPermission "callAbort"; // Needed by file permissions restriction system: // permission java.lang.RuntimePermission "accessUserInformation"; permission java.lang.RuntimePermission "getFileStoreAttributes"; }; grant codeBase "${derby.install.url}derbynet.jar" { // This permission lets the Network Server manage connections from // clients. // Accept connections from any host. Derby is listening to the host // interface specified via the -h option to "NetworkServerControl // start" on the command line, via the address parameter to the // org.apache.derby.drda.NetworkServerControl constructor in the API // or via the property derby.drda.host; the default is localhost. // You may want to restrict allowed hosts, e.g. to hosts in a specific // subdomain, e.g. "*.example.com". // permission java.net.SocketPermission "*", "accept"; // Allow the server to listen to the socket on the default port (1527). // If you have specified another port number with the -p option to // "NetworkServerControl start" on the command line, or with the // portNumber parameter to the NetworkServerControl constructor in the // API, or with the property derby.drda.portNumber, you should change // the port number in the permission statement accordingly. // permission java.net.SocketPermission "localhost:1527", "listen"; // Needed for server tracing. // permission java.io.FilePermission "${derby.drda.traceDirectory}${/}-", "read,write,delete"; // Needed by file permissions restriction system: // permission java.lang.RuntimePermission "accessUserInformation"; permission java.lang.RuntimePermission "getFileStoreAttributes"; permission java.util.PropertyPermission "derby.__serverStartedFromCmdLine", "read, write"; // Needed to boot MBeans permission org.apache.derby.security.SystemPermission "engine", "usederbyinternals"; // JMX: Uncomment this permission to allow the ping operation of the // NetworkServerMBean to connect to the Network Server. // //permission java.net.SocketPermission "*", "connect,resolve"; // Needed by sysinfo. The file permission is needed to // check the existence of jars on the classpath. You can // limit this permission to just the locations which hold // your jar files. // // In this template file, this block of permissions is granted // to derbynet.jar under the assumption that derbynet.jar is // the first jar file in your classpath which contains the // sysinfo classes. If that is not the case, then you will want // to grant this block of permissions to the first jar file // in your classpath which contains the sysinfo classes. // Those classes are bundled into the following Derby // jar files: // // derbynet.jar // derby.jar // derbyclient.jar // derbytools.jar // permission java.util.PropertyPermission "user.*", "read"; permission java.util.PropertyPermission "java.home", "read"; permission java.util.PropertyPermission "java.class.path", "read"; permission java.util.PropertyPermission "java.runtime.version", "read"; permission java.util.PropertyPermission "java.fullversion", "read"; permission java.lang.RuntimePermission "getProtectionDomain"; permission java.io.FilePermission "<<ALL FILES>>", "read"; };