The latest USG FLEX series 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.
Benefits | 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 security made easy for SMBs
USG FLEX series is your network security ally that leverages AI security cloud to operate multi-layered protection such as anti-malware, DNS/IP/URL filtering, IPS, and application patrol. Our multiple OS supported SecuExtender easily extends the same security outside network premise to remote employees that are on the go. USG FLEX series makes zero trust security easy for small to mid-sized business users.
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.
Best threat intelligence alliance
To ensure your network on getting the best protection, USG FLEX integrates threat intelligence from leading companies and organizations in the cybersecurity field for scaled information about file and real-time threat data. By leveraging a wider malware coverage with multiple-sourced database, this increases the accuracy in threat detection. Web Filtering is also included to safeguard all internet access, especially with CTIRU (Counter-Terrorism Internet Referral Unit) to restrict access to terrorist materials online.
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.

• Malware Protection
• Threat Protection
• Web Content Filtering
• URL Filtering
• Intrusion Prevention
• Application Control
• Email Security
• Distributed Denial of Service (DDoS)
• Anti-spam

• DES
• 3DES
• AES (256-bit)
• MD5
• SHA-1
• SHA-2
• WPA3

• SMTP
• HTTP
• FTP
• IMAP
• L2TP
• SMB

• DNS Filtering
• Anti-malware

• USG FLEX 100W Network Security/Firewall Appliance
• Power Adapter
• RJ-45 - RS-232 Cable for Console Connection

• Business
• Network
• Office
• Home Office
• Security
• Tunnel
• Server
• PC
• IoT Devices

• FCC Part 15 (Class B)
• CE EMC (Class B)
• BSMI
• LVD (EN60950-1)