Applet client security requirements
When code is loaded, it is assigned permissions based on the security policy in effect. This policy specifies the permissions that are available for code from various locations. You can initialize this policy from an external policy file.
By default, the client uses the app_server_root/properties/client.policy file. You must update this file with the following permission:
SocketPermission grants permission to open a port and make a connection
to a host machine, which is your WebSphere® Application
Server. In the following example, yourserver.yourcompany.com is
the complete host name of your WebSphere Application
Server:
permission java.util.PropertyPermission "*", "read"; permission java.net.SocketPermission "yourserver.yourcompany.com ,"connect";