Ultimate H series.

The USG FLEX H series is equipped with enhanced network protection that leverages cloud intelligence to help identify and protect against new/unknown threats within minutes of an outbreak.

The Ultimate series supports the full set of Zyxel Networks’ Unified Threat Management security services (web filtering, application patrol, anti-malware etc.) which are further enhanced with the use of advanced functionality like sandboxing, IP and DNS reputation filtering for those customers who require an extremely fast and reactive approach to network security.


Sandboxing allows a rapid response to new threats that have not yet been identified and then contain them leveraging from a variety of latest tech including AI and cloud technologies.


Preventing up to 70% of threats as a first-line defense, our industry-leading filtering technologies include DNS content filter and reputation filtering, eliminating blind spots even with encrypted traffic.

Web Security.

Includes content filter features, covering IP checking with cloud-synced categories that are continually kept up-to-date with an ever evolving cloud.

Malware & Ransomware Protection.

Our anti-malware delivers quick and responsive protection against the latest threats in malware.


CDR (Collaborative Detection & Response) allows network devices to work together to block or quarantine the compromised client devices at the network edge.

Powerful Centralized Management.

Ability to manage in on-premise mode (standalone) or leverage from our powerful centralized cloud management platform, Nebula.