ZYXEL USGFLEX100H Cyber Security Firewall | 4 Gbps, Up to 50 Users, Nebula Cloud

Compact, high‑performance firewall for growing teams

The Zyxel USGFLEX100H is a fanless, hardware‑only security appliance designed for small to mid‑size offices. It delivers strong on‑premises protection with a 4 Gbps firewall capacity while supporting up to 50 users. Its silent operation and compact footprint help keep desks and workspaces free from noise and heat, making it suitable for reception areas, small conference rooms, and quiet corners alike. Users can enjoy reliable local security without compromising an open, collaborative environment.

Offline‑capable setup and updates provide resilience where internet access may be intermittent. Configure through the Nebula portal wizard and apply firmware updates over FTP on the local network, all while the web UI remains accessible after each update. This means ongoing protection with less downtime for administration and fewer surprises during maintenance windows.

Flexible networking that grows with you

Eight 1G RJ‑45 ports can be reassigned as WAN or LAN to match your topology. It supports WAN load balancing and active‑backup failover to keep services reachable during uplink outages. With up to 16 VLAN interfaces and Link Aggregation, teams can segment traffic and maximize throughput without reconfiguring your entire network.

Layered security you can enable as you need it

Security features start with multi‑layered hardware defense, including reputation filtering for IP, DNS, and URL requests and SecuReporter visibility as part of the Entry Defense Pack. If you opt for the Gold Security Pack, you unlock advanced protections such as anti‑malware, sandboxing, web filtering, IPS, and a full UTM suite. This modular approach lets you tailor defenses to your risk profile and compliance requirements without overpaying for features you won’t use.

Nebula Cloud management and flexible VPN options

Centralized configuration and policy synchronization are delivered through Nebula Cloud, with SD‑VPN orchestration to simplify remote access for distributed teams. Supported protocols include IKEv2 IPSec, SSL VPN, and even Tailscale VPN. The platform accommodates up to 50 IPSec tunnels and 25 SSL VPN users, plus up to 24 managed access points via Secure WiFi, enabling scalable, cloud‑driven management without sacrificing on‑premises control.

Real‑world benefits at a glance

In an office with fluctuating device counts and remote workers, the USGFLEX100H helps keep critical work running smoothly while letting IT dial in security and access controls as business needs evolve. The combination of a quiet, compact device with potent throughput and scalable security makes it a practical choice for teams that value protection, flexibility, and ease of administration.

• 4 Gbps firewall throughput, 1,500 Mbps IPS, 900 Mbps VPN
• Up to 50 users, 300,000 concurrent sessions, 50 IPSec tunnels
• 8 x 1G ports, WAN/LAN flexibility, 16 VLANs, Link Aggregation
• Offline firmware updates via FTP with uninterrupted web access
• Nebula Cloud management with SD‑VPN, IKEv2 IPSec, SSL VPN, and Tailscale

• Reputation filtering and SecuReporter visibility in Entry Defense Pack
• Optional Gold Security Pack for anti‑malware, sandboxing, web filtering, IPS, and full UTM
• TAA compliant for procurement flexibility