USG FLEX Firewall

USG FLEX 700H

USG FLEX H series provides secure, fast protection with ground-breaking high performance for Virtual Private Networks (VPN) and Unified Threat Management (UTM), a multi-layered approach to protecting the Firewall, the network infrastructure and connected users by leveraging Zyxel’s high-performance hardware and state-of-the-art AI Security Cloud architecture.

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Ultra High Performance

Ultra-high Performance powered by our next-generation multi-core hardware and Fastpath technology to create ultra-high efficiency. The USG FLEX H series can boost performance by up to 3x, optimizing utilization of its processors and allowing Zyxel to deliver superior performance to satisfy the needs required by demanding and high-speed networks.

Port Flexibility, Multi-G and PoE+

With 2.5 Gbps and 10 Gbps Port Speed options, The USG FLEX H also features software-defined ports, allowing you true flexibility in the configuration and tailoring of each USG FLEX H as required (WAN or LAN).

The USG FLEX H offers up to 2 x 30W PoE+ integrated ports*1 to help reduce complexity by simplifying installations and reduce install costs by allowing you to power devices like 5G Routers, latest WiFi, or appliances like VoIP Phones directly from the USG FLEX H itself.

Cloud & on-prem in sync

Nebula revolutionizes network management with Smart Sync, enabling seamless cloud-based configuration of on-premise firewalls. Effortlessly enforce unified security policies, monitor threats in real time, and optimize performance from anywhere. This cutting-edge solution delivers unmatched convenience, scalability, and robust protection across hybrid cloud environments.

AI-powered cloud cybersecurity

Network security constantly evolves to meet the demands of an ever-changing working environment. Block malicious threats and restrict inappropriate user behaviours. The USG FLEX H series leverages AI-powered cloud intelligence to operate multi-layered protection such as sandboxing, anti-malware, DNS/IP/URL filtering, IPS, and application patrol over your premises.

Our new Fast and Powerful uOS

The USG FLEX H series introduces our latest powerful uOS (Operating System). It is designed to increase security, minimize system response time, apply configuration changes instantly and optimize configuration and security policy management with its new intuitive UX (User Experience) design.


  • All specifications are subject to change without notice.
  • The USG FLEX H series models are compatible with different PoE+ integrated ports. Please refer to the spec table for more details.