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Knowledge Base
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Demo Zone
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Warranty
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Campus Services
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Virtual Lab
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Configuration Service
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Wifi Site Survey
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Configuration Services
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Smart Support
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KNOWLEDGE BASE
Next Generation Firewall
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Troubleshooting
- Deep Insight - Tips & Tricks for Firewall Products
- USG FLEX - SNMP Settings and Troubleshooting
- Logging high-level debug logs on USG/VPN/ATP-Firewalls (PuTTY-to-Textfile) via console
- Overview of Helpful CLI Commands for USG Series (Best Practice)
- High CPU utilization with ZyWALL Security Gateway
- Connection is slow / drops sometimes on USG - what could it be? ( Session Limit ) See all 15 articles
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Security Advisory
- TECHtalk - Starting with USG FLEX Basic 1: "Objects"
- Zyxel security advisory for local privilege escalation and authenticated directory traversal vulnerabilities of firewalls CVE-2022-30526, CVE-2022-2030
- Zyxel security advisory for authentication bypass vulnerability of firewalls
- Zyxel security advisory for command injection and cross-site request forgery vulnerabilities of select Armor home routers
- Zyxel security advisory for Apache Log4j RCE vulnerability CVE-2021-44228
- Directory traversal and command injection of VPN2S See all 13 articles
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HA - HA Pro
- Device HA - Firmware Upgrade hang / stuck with Loading - How to fix it?
- DeviceHA - Recovery of your HA Scenario without unbind it
- Device HA Pro redeploy
- USG/Zywall - How to replace a defect device in HA Pro
- Device HA Pro Setup
- Device HA Pro - Do I need all licenses twice for an HA (high-availability) solution?
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Unboxing and Initial Setup
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VPN
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Management
- Diagnostic and error analysis for Zyxel Firewalls - Guideline / Compendium
- Looking for an End-to-end Security Solution - Zyxel have it all, be it Standalone or Cloud Managed!
- SSO AGENT EOL Notice
- How to connect SP350E Printer to USG FLEX series
- USG FLEX / ATP - Throughput / Speed Boost for WAN and VPN
- USG FLEX / ATP / VPN Series: Wireless Health See all 41 articles
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NAT
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VoIP
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Firmware
- FAQ - Security Appliances and Services
- SSO Agent 2.0 - Supporting AD Windows Server 2019
- Application Patrol Signature issue of ATP & USG FLEX Series
- Changing the downloadable firmware slot on ATP / VPN / Zywall / USG series routers
- Download Firmware from MyZyxel for your Security device (FLEX, ATP, USG, VPN, ZYWALL)
- FQDN - Firmware Upgrade Steps for devices updating from 4.39-4.55 Firmware Version See all 22 articles
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UTM Services
- Zyxel USG FLEX Series - Introduction and flexible configuration using licenses
- App Patrol - DNS over HTTPS blocking
- Cloud Email Security - Office 365 integration setup
- Astra App - What is it and why should you use it?
- IP Reputation, URL Threat Filter & DNS Threat Filter - What is it and how is it used?
- ATP / USG FLEX - Skip UTM activation in Wizard See all 35 articles
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DNS
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Interfaces
- USG FLEX / ATP / VPN Series: Using Virtual Interfaces
- USG FLEX / ATP: Bridge Interface
- New usage of DHCP Table in USG FLEX/ATP/VPN Series
- How to setup a virtual interface for your WAN on a Zywall/USG
- Instructions for setting up a hardware ZyWALL USG series gateway using a static IP address for connecting to the Internet
- Using a public subnet for DMZ without SNAT in ZyWALL USG series hardware gateways See all 25 articles
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Licensing
- Licensing - Graceperiod
- USG Series / License Phase Out and Free IDP Signature Information
- MyZyxel shows "no compatible product" message when trying to link my Antivirus/UTM license to my USG FLEX/ATP - What can I do?
- Migration to a Flex Product + License Transfer
- I cannot link my SSL client license on my ZyWall USG on myZyxel!
- Where can I buy Zyxel devices or licenses? See all 7 articles
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Firewall
- My default deny firewall rule is blocking my LAN traffic? Firewalls or routers WAN and LAN zone not separated properly
- Basic Configuration of Zyxel Firewall - Objects, Zones, NAT, VPN and more! (USG / FLEX / ATP)
- Security Policies on USG FLEX/ATP/VPN - Helpful tricks and tips
- Firmware 5.10 - ATP and USG FLEX on Cloud New Management Wizard
- ADP - Flooding UDP on Port 4500
- Adding a firewall rule / security policy on your ATP/USG FLEX/USG/ZyWall-Gateway See all 21 articles
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Routing
- Ask ALLY - why did they throw me out? We explain possible Internet issues
- How to use the "Routing Traces" function on USG/ZyWALL devices?
- Policy Routes ( USG/VPN/ATP) - Different scenario usages & configurations
- Static Routes - What they are and when to use them (USG FLEX/ATP/VPN)
- WAN Failover on a USG with Policy Routes
- WAN Failover with Mail Alert (USG Series FW 4.10)
Nebula
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Nebula Control Center
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Gateway
- Migrating from NSG to new USG FLEX - Feature and Conversion Explanation
- DNS Content Filter on Nebula Firewalls (ATP + USG Flex)
- USG FLEX - Standalone vs. Cloud management for quick, easy and fast setup!
- How to register a USG FLEX/ATP/USG20(w)-VPN gateway in Nebula Control Center (NCC)
- Nebula: Creating and editing LAN / VLAN interfaces on your USG FLEX / NSG
- How can I convert my USG20(W)-VPN bundled license to use on cloud? See all 28 articles
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Switch
- How to setup static routes for L3 Switches in Nebula?
- ONVIF Discovery on Nebula Switches
- How to configure Nebula Switch to connect to the Internet?
- Activate cloud-mode on GS1350 Series Switches (Surveillance Switch / Nebula)
- Problems getting DAC cables to running on my Nebula Switch (e.g. XGS1930)
- How to protect your network devices using Nebula Switches?
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APs
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Licensing
- Nebula - How to upgrade an ORG from Base to Plus or Pro Pack?
- How to transfer your used Nebula device License to other devices?
- How to use License Wizard in Nebula to assign and unassing licenses
- How is my existing Nebula license converted into the new License 2.0?
- Nebula - License 2.0
- Nebula License 2.0 - What it's all about
Switch
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VLAN
- How to configure inter-routing between different VLANs
- Configuring RADIUS Server for dynamic VLAN assignment with Zyxel Switches
- What is VLAN Trunking
- Private VLAN
- VLAN - A deeper look at how they work
- VLAN - Tagged VLANs vs. PVID (Setup Example Untagged/Tagged VLAN on a GS22XX-Switch) See all 12 articles
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PoE
- PoE switch on / off by schedule (time-controlled) for GS1900 HP Series
- GS1300 / GS1350 Series - Zyxel CCTV Surveillance Switch Family
- RGS200-12P / RGS100-5P: How to connect RGS to a power module
- RGS200-12P / RGS100-5P: Switch is not powering up the PoE Ports - what can it be?
- GS1300 "Surveillance" Unmanaged Switch Series - Enabling PoE Extended Range PoE
- GS1350 Series - Enabling PoE Extended Range See all 7 articles
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Management
- FAQ - Switch
- Including information about local users and AAA services (Radius, TACACS+) in the switch text-based configuration
- Differences between Switch models in series GS1100 and GS1900 versions
- XGS4600 Series - Advanced Routing License (for IPv6 RIPng and OSPFv3)
- XS1930-10 has a pulsating fan noise
- Enable functions on Metro Ethernet Switch series via CLI (MESxxx, MGSxxx) See all 31 articles
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Stacking
- Firmware Upgrade for a Stacking System
- Basic setup Redundancy / HA / Stacking
- Switch Redundancy / HA / Stacking system Overview
- How to setup link aggregation between a stand-alone switch and switch in stacking mode
- How to configure stacking for switch (high server availability)
- What is hardware stacking on a switch?
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Security / Filtering
- DHCP Snooping
- MAC Authentification with Active Directory
- Zyxel security advisory for OS command injection vulnerabilities of GS1900, XGS1210, and XGS1250 series switches
- MAC Pinning feature in ZyXEL Ethernet Switches
- How to configure bandwidth control on a switch
- How to configure the switch to prevent IP scanning (Anti-ARP Scan) See all 10 articles
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Spanning Tree
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Multicast / IGMP
- Networked AV Mode - ATEN Partnership
- How to block Multicast in Network
- How to configure IGMP routing for multicast clients in a different LAN
- How to configure IGMP Snooping for multicast clients in the same LAN
- Why is the switch not sending IGMP General Query when setting IGMP Snooping for a fixed VLAN?
WLAN
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Unboxing and Initial Setup
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Controller
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Multy
- Multy M1 / Ethernet Backhaul
- Multy X / Multy Plus - Firmware Update via USB
- Multy U - Troubleshooting
- Multy Plus - PPPoE / Static IP setup
- Multy Devices Reset when Certification Authority Expired (May 2020)
- Urgent Upgrade notification for Multy WiFi System Series (Certificate Authority Renewal - May 2020) See all 28 articles
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Firmware
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WLAN-Router
- LTE3301-PLUS - Troubleshooting & Port Forwarding
- NBG-418v2 - Differences between AP mode / Repeater mode / Router mode
- NBG-419Nv2 - How to Change the Password
- Accessing your router via Web GUI
- How to configure USB printer with NBG6817 on Windows 10?
- How to configure VLAN group on VMG See all 21 articles
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Repeater
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APs
- WiFi Performance - Best Practice for a Professional Deployment
- Access Points - Best Pratice Scenarios
- Zyxel security advisory for OS command injection vulnerability of NWA1100-NH access point
- AX Access Points / Reset Button and Device Reset
- Nebula AP "Easy Troubleshoot"
- CNP (Connect & Protect) - AP Security Service - What is it? See all 45 articles
5G / LTE
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5G
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LTE
- Advanced Downloads for LTE devices
- 3G / 4G (LTE) cards / dongles and VPN
- Firmware to (re)flash LTE3302-M432
- Getting started with the WAH7608
- How can I find the optimized position for my LTE device using the LTE ALLY app?
- How do I configure carrier aggregation on the WAH7706 (LTE4506)? See all 39 articles
Management and Monitoring
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Circle
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MyZyxel
- FAQ - Other Products (LTE / 5G, DSL, MyZyxel & SecuReporter)
- Zyxel security advisory for vulnerabilities of CloudCNM SecuManager
- Product Selector: Which Zyxel device fits perfectly into your network?
- Zyxel License Finder: Find the correct license for your Firewall, Nebula device, Gateway or Switch!
- myZyxel Marketplace - Purchase Licenses
- Re-register ZyWall to another MyZyxel Account See all 20 articles
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SecuReporter
xDSL / Fiber
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GPON
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DSL / VDSL
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DSLAM
- How does the IES5206 work with ADSL2+ bonding?
- VES: How to setup and activate Link Aggregation
- Pin Assignment of Telco 50 Connector Used in Different ZyXEL XDSL Switches
- What is the difference between the Fast and Interleave modes in the ADSL profile of IES switches?
- Automatic deactivation of ADSL ports
- VES1724: How to Setup VLAN for DSL-Ports (VDSL-Mode) See all 8 articles
Digital Home
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NAS
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Camera
- Product and Service Suspension Notice of Aurora Cloud Access Camera
- Zyxel Aurora CAM3115 end of cloud service on 31.12.21
- Aurora - How to backup Aurora videos to a NAS
- Aurora - How to record a live video and take a snapshot
- Aurora - How to download a video
- Aurora - How to schedule a video recording See all 10 articles
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Powerline
Warranty & Services
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Enhanced Services
- Zyxel security advisory for buffer overflow vulnerability in Realtek eCos SDK
- How to find my ISP?
- Zyxel security advisory for CRLF injection vulnerability in some legacy firewalls
- Zyxel security advisory for password guessing vulnerability of GS1200 series switches
- Zyxel security advisory for multiple vulnerabilities of firewalls, AP controllers, and APs
- Zyxel security advisory for OS command injection vulnerability of firewalls See all 46 articles
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Warranty
- Clues to check a device is really defect before RMA case request
- End of Life (EOL/EoL) / End of Support (EOS/EoS)
- ECCN / HS Code of Zyxel products
- I found a wrong power cable in the box of my Zyxel product
- How do I claim warranty service for my Zyxel product? (RMA-Process)
- Products and warranties See all 15 articles
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Internal Warranty
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Campus Academy
Demo Zone
Find the latest Knowledgebase Updates here
Popular Help Topics
- Deep Insight - Tips & Tricks for Firewall Products
- VPN Guideline - Choosing the right VPN-type for your Home-Office (+Useful Links & Tutorials)
- Diagnostic and error analysis for Zyxel Firewalls - Guideline / Compendium
- Looking for an End-to-end Security Solution - Zyxel have it all, be it Standalone or Cloud Managed!
- FAQ - Security Appliances and Services
- Nebula Device Registration - Overview Article
- FAQ - Nebula
- FAQ - Switch
- FAQ - WLAN
- Advanced Downloads for 5G devices
- Advanced Downloads for LTE devices
- Zyxel Management Portals Overview (MyZyxel, Circle, Nebula & Marketplace)
- FAQ - Other Products (LTE / 5G, DSL, MyZyxel & SecuReporter)
- Advanced Downloads for CPE devices
- FAQ - Digital Home
