Core provides the core functionality of the solution, while Sentry provides either integration with ActiveSync email services or app tunneling services. The Sentry is available in two configurations: Standalone and Integrated (email services only). The following diagram shows Standalone Sentry. (Refer to the Standalone Sentry Guide for details about Standalone Sentry.)

For Firewall rules see:

• Internal corporate network rules

• External and Internet rules

• Additional firewall rules