Internet UTM Firewall Appliances developed by Global Technology Associates, Inc, GTA include IPS, VPN, Virus Blocking, Spam Filtering and URL Filtering.
Unified Threat Management - Support | GTA, Inc.
GB-OS Documentation
Documentation for GB-OS Version 5.2.x
Secure Firewall OS
Need Help Finding Documentation?
GTA released GB-OS 5.2 in February 2009. This new operating system version offers adds VPN Failover, Link Aggregation, Enhanced Graphical User interface and many exciting new features. If you have updated your GTA firewall to GB-OS 5.2 (or higher) please select the GB-OS 5.2 icon above for current documenation. It will provide you with GB-OS 5.2 documentation and updated documentation for GTA's products and features based on utilization with GB-OS 5.2.

If you have not yet updated to GB-OS 5.2 and are running an older version of GB-OS on your firewall, GB-OS 5.1.X, GB-OS 5.0.X and GB-OS 4.0.X documentation is also available.
Looking for documentation for previous GB-OS versions? Click here.

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'GB-OS', 'Surf Sentinel', 'Mail Sentinel' and 'GB-Ware' are registered trademarks of Global Technology Associates, Incorporated. 'GB Commander' is a trademark of Global Technology Associates, Incorporated. 'Global Technology Associates' and 'GTA' are service marks of Global Technology Associates, Incorporated.