User`s guide

AT&T Global Network Client for Windows Administrator’s Guide
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Operating Modes
The AT&T Global Network Client Firewall supports three operating modes. Certain modes require
configuration in the AT&T administration server. Refer to Appendix A of this guide for more information
about configuration options stored in the AT&T administration server. AT&T Global Network Client
Firewall values set in the AT&T administration server always take precedence over values set locally using
the AT&T Global Network Client.
Default
The Default configuration disables the firewall at all times, on all network interfaces.
Trusted Domains
The Trusted Domain configuration is used to control the firewall state for trusted domains. The Trusted Domain
configuration enables the firewall at all times on all network interfaces unless it is actively connected and assigned
a Connection Specific DNS suffix in a Trusted Domain list defined at installation time. Even in Trusted Domain
mode, regardless of the Connection Specific DNS Suffix assigned, if an AT&T Integrated VPN session is established
the firewall is enabled on all interfaces. See page 62 for more information on configuration of a Trusted Domain
list.
User Controlled
The state of the firewall is controlled using the AT&T Global Network Client Firewall Settings Window
described in the section below. This mode will be affected by the values set for ‘Enable AT&T Global
Network Client Firewall’ and ‘User Controlled Firewall’ fields in the AT&T administration server.
Disabled
The Disabled configuration disables the firewall at all times, on all adapters. The user does not have the
ability to turn the firewall on at any time.
When the user selects the AT&T Global Network Client from the Start menu, and clicks Firewall Settings
Window the user will receive a message stating “Your network administrator has chosen not to use the
firewall.”
This mode requires a “NO” value set for ‘Enable AT&T Global Network Client Firewall’ and ‘User
Controlled Firewall’ fields in the AT&T Administration Server.
Firewall Settings Window
The AT&T Global Network Client Firewall Settings Window allows a user to select the Firewall state
(On/Off) when a VPN connection is not active. When the user establishes an active AT&T Global Network
Client VPN connection the firewall is automatically enabled on all network interfaces unless the AT&T
Global Network Client Firewall is operating in Disabled mode.