USG FLEX Firewall

The latest USG FLEX 100W provides one single management platform on the cloud while expanding and strengthening the protection from firewalls to access points with automatic responses. The newly designed USG FLEX Series is capable of minimizing computing power usage and maximizing firewall performance, delivering up to 5x UTM performance with cloud flexibility and collaborative protection to help connect and secure small or mid-sized business users.

Nebula Together

USG FLEX firewalls, the new addition to the Nebula cloud management family, strongly empowers the full-blown Zyxel Security Matrix in Nebula, further optimizing Nebula with holistic security and protection for SMB business networks. Zyxel provides a centralized provisioning security policy to the remote workforce from Nebula and traffic shaping eliminating the network bottleneck to fuel the best business productivity.

Zero Trust
Networks Security

Remote working is here to stay, USG FLEX series applies the principles of zero trust access. It ensures the same security controls are applied to HQ, branch offices, home, or wherever your remote workers reside. Create access policy with device contextual such as OS version or device category to enforce network segmentation. This reduces the attack surface and prevents threats from spreading.

USG FLEX minimizes risk by adding granular policies and access authentication for the ever-growing needs of a secure workplace. Improve protection across identities, devices, applications, and network. Reduce risk and build trust across your entire digital assets.


High Assurance
Multi-layered Protection

USG FLEX is designed with multi-layer protection against multiple types of threats from in and out. Multiple security services empower you to restrict users' inappropriate application usage or web access. Zyxel offers leading-industry DNS content filter, eliminating blind spots in all encrypted traffic with TLS 1.3 without the need to deploy SSL inspection. All together safeguarding your network without any unattended gaps.

Simplified and Unified Licensing Experience

We know the experience from license purchase and renewals are equally important to our partners. We've optimized the licensing management platform and brought a consistent migration path between on-premise and our cloud platform. We make sure our partners can quickly adapt to a secure environment without the hassle but retaining the flexibility for those who need to practice the same security across networks scenarios.


Just Connect with Nebula

  • Just connect with a single vendor
Resellers, Managed Service Providers (MSPs) and network Administrators will find Simplicity, Scalability, Flexibility, reduced IT risk and reduced costs through Zyxel’s Cloud Networking Management platform, Nebula a single-vendor approach.
  • Just Connect without the complexity
Nebula offers powerful, effortless and scalable network connectivity that works together to remove the complexity and security risks often associated with having a mixed vendor approach to networking.
  • Launch an entire network in minutes
Connect, protect and manage Security, Switch, Wireless and LTE/5G connectivity via our centralized Cloud platform, Nebula.
  • Just Connect, with an unmatched portfolio
Serving customers with over 80 Nebula enabled devices via an ever-growing portfolio, Zyxel is unmatched in its approach to onboarding new and existing products via NebulaFlex. From Deploying a home office to delivering connectivity to distributed network configurations, Zyxel’s Portfolio of Nebula enabled products can accommodate all types of budgets, functionality and scalability for now and for the future.


Comprehensive Reputation Filtering Service

USG FLEX Firewall delivers enhanced Reputation filtering functionality and security through its powerful combination of both reputation and category-based filtering. When it comes to the Zyxel Reputation Filter, we are talking about three services: IP Reputation, DNS threat Filter, and URL threat filter.

  • IP Reputation

Provides a database of known malicious public IP addresses that enables the gateway to take action on receiving traffic from/to an IP address on the list.

  • URL Threat Filter

Helps mitigate malware and phishing attacks by blocking malicious webpages by filtering the malicious traffic based on URL category.

  • DNS Threat Filter

If a domain has been known to be e.g. phishing before, the firewall will automatically block that domain. DNS Threat Filter is effective against any IP protocol.


Same Security Across Networks

We offer a wide array of products that allow different remote access options including firewalls for headquarters and branch offices, remote access points with Secure WiFi and VPN client for off-site employees, extending endpoint protection.


Safeguarding Remote Connectivity to Your Corporate Network

Businesses striking a balance on productivity and security protection becomes a priority with growing number of devices. Whether it is a wired, wireless, or a IoT device, the Secure WiFi service is used to build a secure L2 tunnel for Work-From-Home user to extend the working experience easily and securely, as if you were in the office with the safety of both two-factor authentication and secure tunnel, which boosts up productivity and eases IT support. The Secure WiFi service also unlocks the number of managed APs to maximum for the USG FLEX firewall.

Deep Insight Into All Your Devices

Device Insight gives you more visibility of your networks including wired, wireless, BYOD, and IoT devices. You can create access policy with device contextual such as OS version or device category to enforce network segmentation. This reduces the attack surface and prevents threats from spreading. It also helps SMB(s) reduce time spent on investigation. Continuing with our goal of providing our customers with increased visibility, Zyxel SecuReporter gives your organization comprehensive endpoint inventory dashboard.

Level Up Security with 2FA Network Access

Password is not enough to secure your network access. You need a second form of authentication to ensure unauthorized users can’t access your company’s databases, email accounts and more. Google Authentication allows your organizations to authenticate the identities of users accessing your networks through remote desktops and personal mobile devices.

Web Filtering Service

USG FLEX Firewall delivers enhanced web filtering functionality and security through its powerful combination of both reputation and category-based filtering. The dynamic content categorization analyzes the content of a previously unknown website and domain, then determines if it belongs to an undesirable category including gambling, pornography, games, and many others. A newly added DNS content filter offers a better approach to inspect web access, particularly when the website is deploying ESNI (Encrypted Server Name Indication) where the traditional URL filtering is not applicable to the destination domain.


Stay Ahead of Threats with CDR

Collaborative Detection & Response (CDR) is used to identify threats and risks posed in the more complex organization workforce, workload, and workplace. USG FLEX firewalls to Nebula provides network admins with a rule-based security policy. The firewalls detect a threat on any of the connected clients and will sync with the Nebula control center, then automatically respond to cyber threats and contain the device(s) at the edge (Wireless Access Point) of your network. It is a perfect fit for IT to address the requirements of a decentralized network infrastructure and provide automatic protection.


Analytics Report
and Enhanced Insights

USG FLEX series dashboard gives user-friendly traffic summary and threat statistic visuals. Utilize SecuReporter for further threat analysis with correlation feature design, making it easy to proactively trackback network status to prevent the next threat event. Centralized visibility of network activities for you to easily manage multiple clients.


ZyWALL USG FLEX series not only protects your network, but it also support hospitality features including hotspot and concurrent device upgrade. You can buy time-based bundle, so only pay what you need. We also provide Wireless Health Monitor giving you visibility into the connection state of client and access point issues, allowing network administrators to easily troubleshoot issues.

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