This chapter is mainly mediated GWT system provides a variety of policies, including the use and security policies. Application policy includes:
load balancing policy, client-server binding policy, strategic input, alarm policy, dynamic domain name policy. Security policy includes: access
security policy, system security policy, password policy. Application policy allows efficient server performance has been played, reasonable
leverage resources, stability and robustness of the system has been improved. Safety policy has been to improve the system security. System
security policy will stifle security risks at source, and effectively strengthen the security of the server system. The password policy for the system
administrator's password is set to provide a reasonable policy to fundamentally improve the use of were arbitrarily set simple passwords and
other adverse operating practices, improve the difficulty that attacker guess password. These three kinds of security policies in combination
can effectively prevent illegal entry and access. Now we explain in detail these policies.