Surf Sentinel® is GTA's Internet Access Management and Content Filtering subscription service for GB-OS based firewalls available in GB-OS System Software version 5.1.0 and higher.

Surf Sentinel, using a powerful content filtering technology, allows organizations to increase productivity and reduce liability of access to unproductive or inappropriate web sites. This outsourced model categorized lists on off-site servers so no additional hardware is needed. GTA's multiple server locations provide redundancy that effectively eliminates downtime from system failures or heavy data traffic. Time based polices add flexibilty, giving system administrators the ability to set various levels of content filtering for different time groups. With over 70 content categories and enhanced policy settings, Surf Sentinel Content Filtering is easily customizable for organizations of all types and sizes.

When browsing the Internet, users request to access approved (1a) or unproductive, inappropriate (1b) websites.

Surf Sentinel checks and sorts requests by allowing access to approved websites and blocking access to restricted websites.