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USB Storage – Full Warning in USG Flex H Series
Disk Full Warning Overview This feature provides event logs and automated actions when the remaining space on a connected USB Flash Drive falls below a user-defined threshold. Key Behavior: Threshold criteria: Based on remaining space (not total capacity). Additional option can be applied that automatically removes the…
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Unlocking Lockout Users in USG FLEX H Series (v1.31 Update)
What are Lockout Users? The firewall automatically blocks source IP addresses that attempt to brute-force device login by exceeding the fail threshold. [New in v1.31] Lockout IP Management Page Provides administrators with a dedicated page to view and manage locked-out IP addresses.Allows manual unlocking of locked-out…
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uOS – Configuration Migration Tool
Seamlessly Upgrade Your Firewall Configuration Zyxel has introduced a Configuration Migration Tool to help users migrate settings from older Zyxel firewalls (USG, ATP, VPN, FLEX) to USG FLEX H-Series firewall. This tool automates the process, reducing the need for manual reconfiguration when upgrading to USG FLEX H-Series…
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uOS 1.31 – Email Certificate Feature
New Feature: Email Certificates Directly from Your Firewall In uOS 1.31, Zyxel firewalls now allow administrators to email SSL certificates directly from the firewall's interface. Instead of manually downloading and sharing certificates, you can now send them as email attachments to recipients. How to Configure It Go to:…
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uOS 1.31 – Notification Alert Enhancements
In uOS 1.31, Zyxel firewalls now support event-based email notifications for system alerts. This enhances the existing log alerts by allowing admins to receive real-time email notifications when important events occur. How to Enable Event Notifications Step 1: Configure Email Server Before enabling notifications, set up a…
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uOS - Download Standby Partition Files (v1.31 Update)
The Download Standby Partition Files feature in uOS 1.31 allows users to view and download standby partition files, including: Configuration files Debug logs Viewing Standby Partition Files The web GUI only displays files from the running partition, the standby partition is hidden Users can view standby partition by…
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Device HA (High Availability) in uOS 1.31
Device HA ensures uninterrupted network connectivity by deploying two firewalls in an active-passive setup. If the active device fails or loses connectivity, the passive device takes over automatically to maintain network stability. 1. Requirements of Device HA Requires Same Model & Firmware: Both firewalls must be the…
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NAT Over IPSec VPN in uOS 1.31
The NAT Over IPSec VPN feature in uOS 1.31 allows network administrators to use Network Address Translation (NAT) inside an IPSec VPN tunnel. This is crucial for: This feature is now available for policy-based VPNs, while route-based VPNs have already supported NAT in previous versions. 1. Type of Types of NAT Over IPSec…
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Bridge Interface Enhancements in uOS 1.31: Improved Configuration & Restrictions
With uOS 1.31, Zyxel has enhanced bridge interface management to eliminate configuration conflicts and improve usability. 1. Why Were These Changes Made? Previously, users could add any physical or VLAN interface to a bridge without restriction. However, this caused confusion because: Some interface settings stopped…
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Secondary IP in uOS: Expanding Network Flexibility
The Secondary IP feature in uOS 1.31 allows administrators to assign multiple IP addresses to a single network interface. This capability is useful for expanding network addressing, managing multiple services, and ensuring better network segmentation—all without requiring additional hardware. 1. What is a Secondary IP? A…
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WAN Connection Auto Rollback in uOS 1.31
The WAN Connection Auto Rollback feature in uOS 1.31 ensures that a firewall does not lose its Internet connection due to misconfigured WAN settings. 1. What is WAN Connection Auto Rollback? Purpose: Prevents network downtime by automatically reverting to the previous working WAN configuration if a new setting disconnects…
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uOS – Packet Flow Explorer
1. What is Packet Flow Explorer? The Packet Flow Explorer is a powerful troubleshooting tool in uOS firewalls that helps administrators analyze how traffic is processed. It shows how the firewall makes decisions based on routing, NAT, and policy rules. This tool is essential when multiple firewall rules overlap or…
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SIP ALG in uOS: Understanding and Configuring VoIP Traffic Handling
SIP ALG (Session Initiation Protocol - Application Layer Gateway) is a firewall feature that helps manage SIP-based VoIP traffic across NAT (Network Address Translation) devices. The uOS firewall implementation of SIP ALG focuses on SIP and RTP pinholes, while SIP transformation is not supported due to its potential to…
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Nebula Status Dashboard in uOS: Understanding Firewall Connectivity States
The Nebula Status Dashboard in uOS provides real-time visibility into a firewall’s connectivity with NCC. This feature, while introduced earlier, has some unique behaviors and quirks that administrators should be aware of. 1. Where to Find the Nebula Status Indicator Dashboard → Nebula Status Hovering over the status…
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Nebula Status Network Tool in uOS: Troubleshoot Cloud Connectivity
The Nebula Status tool is an essential network diagnostic feature introduced in uOS 1.30. This tool helps administrators quickly diagnose connectivity issues between their firewall and NCC. Where to Find the Nebula Status Tool Navigate to: Maintenance → Diagnostics → Network Tool → Nebula Status When testing Nebula status,…
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Object Member List Enhancements in uOS 1.31
With the uOS 1.31 update, Zyxel has introduced two key enhancements to the Object Member List in firewalls, making it faster and more user-friendly to manage Address Groups, Service Groups, and User Groups. 1. Direct "Add Object" Button from Member List Now, you can create new objects directly while editing a group!When…
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Introducing the USG FLEX 50H/50HP: The Next-Generation Small Business Firewall
Zyxel is launching the USG FLEX 50H and USG FLEX 50HP, the latest additions to the H-Series firewall lineup. Set to release in Q1 2025, these models replace the USG FLEX 50 and bring enhanced security, performance, and cloud integration for small businesses. 1. Key Features & Hardware Overview The USG FLEX 50H/50HP offers…
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Managing Security Services for USG FLEX H Series on NCC
With Nebula 18.30, users can now configure various security services for USG FLEX H Series firewalls directly on NCC. Security Services Now Configurable on NCC Path: Site-wide > Configure > Firewall > Security Services Users can now manage the following security services: Content Filter Application Patrol IP Exception DNS…
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Managing USG FLEX H Series Objects on NCC
With Nebula 18.30, users can now create, edit, and manage objects for USG FLEX H Series firewalls directly on Nebula Control Center (NCC). What is an “Object”? In networking, an object refers to predefined network elements that can be referenced by multiple services for consistent and efficient configuration. New in Nebula…
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Managing USG FLEX H Series Ports and Interfaces on NCC
With the Nebula 18.30 update, users can now configure ports and interfaces for USG FLEX H Series firewalls directly on Nebula Control Center (NCC). New Enhancements in Nebula 18.30: Users can create, edit, and manage interfaces from NCC. Supported Interface Roles: External – Typically used for WAN connections. Internal –…
