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Why I can't login to my GS1900 web GUI?
Q. Why I can't login to my GS1900 web GUI? I type in the account & password and click the enter button, but nothing happens. A. This is more likely your account's password includes unsupported characters. Here is the character that GS1900 supports. Enter a password using the keyboard characters ("a – z", "A – Z", "0 – 9",…
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Why my switch has strange certificate?
Q: Why my switch has strange certificate? |-Subject : CN=GS1350 d8ece5ba42d3 A: This is the switch default certificate. You can upload your own certificate to your switch. Please navigate to MAINTENANCE > Certificates in the switch's interface. Here, you have the option to import your self-signed certificate. Choose your…
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Can I upload certificate to Zyxel switch?
The Zyxel switch, smart management series like GS1915 and higher-level switches, supports HTTPS certificates, with one HTTPS certificate pre-installed. To manage certificates, navigate to MAINTENANCE > Certificates in the switch's interface. Here, you have the option to import your self-signed certificate. Choose your…
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[Troubleshooting] PDs Not Powering Up or Unstable Connection with PoE Switch
If your powered device (e.g., an IP camera) fails to power on or frequently disconnects when connected to a Zyxel PoE switch, please follow this troubleshooting checklist: 1. Port Cross-Testing Swap the port to other PoE ports for cross testing. 2. Check Cable Material Ensure you are using CAT5e or CAT6 copper cables. 3.…
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Network Switch [Connectivity] - Troubleshoot NTP issues (Nebula / Standalone)
Zyxel switch uses NTP protocol to automatically synchronize system date and time with global servers. This makes sure users could find the logs with correct time in the event log. But once the synchronization fails or incorrect, it could cause network issues. This topic will guide you how to troubleshoot the NTP…
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Switch Firmware v5.00: Enhanced Firmware Integrity Check
To improve system security and prevent tampering, Zyxel Networks has implemented a new Enhanced Firmware Integrity Check mechanism in its latest switch firmware v5.00. This enhancement helps validate firmware authenticity using standardized cryptographic verification before installation or upgrade. Why Firmware Integrity…
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Switch Firmware v5.00: Login Privilege Enhancements
In the latest firmware release v5.00, Zyxel Networks has introduced a security-focused enhancement to how login privileges are handled for switch user accounts. The change is designed to limit unauthorized access to configuration settings. What’s New? Previously, users with Privilege Level 2 (commonly used for guest or…
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Switch Firmware v5.00: Service Access Control Logs
With the firmware update in version 5.00, Zyxel has enhanced its logging capabilities for switches by introducing the Service Access Control Log. This new feature allows administrators to track changes to remote access services, helping ensure accountability and improved network visibility. What Is Service Access Control…
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Switch Firmware v5.00: User IP Lockout
Zyxel Networks has added a key security enhancement to its switch firmware with the release of v5.00: User IP Lockout. This feature is designed to protect switch management access from unauthorized login attempts by temporarily blocking IP addresses that repeatedly fail authentication. What Is User IP Lockout? User IP…
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Switch Firmware v5.00: Password Complexity
With the latest firmware update, Zyxel Networks now offers Password Complexity Enforcement on supported switch models. This feature, long available in security appliances, is now part of the switch lineup—designed to improve account security and meet stricter compliance requirements in enterprise and regulated…
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CX4800 Series: New Lost Password Recovery Procedure
In Nebula 18.30, Zyxel introduced the CX4800 Series. These high-performance switches are built without a physical reset button, raising the question: How can users reset the device to factory defaults if the admin password is lost? With the latest update, Zyxel has provided a new solution to address this. The Challenge: No…
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What's New in Switch Firmware v5.00: Six Minor but Powerful Enhancements
The v5.00 firmware release for Zyxel managed switches brings a set of six practical enhancements designed to improve security, usability, and troubleshooting efficiency. Though labeled as “minor,” these updates deliver meaningful improvements for administrators and service providers alike. 1. Password Input Masking in CLI…
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Switch in April 2024 Patch: Expanded MIB Support for Smart Managed Switches
In the April 2024 firmware release, Zyxel Networks introduced a major upgrade for its Smart Managed Switches by significantly expanding SNMP (Simple Network Management Protocol) support. This enhancement increases visibility and control for IT administrators using SNMP-based network monitoring tools. What’s New?…
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Switch in April 2024 Patch: Stabilize Cloud Auto Configuration Recovery
In Nebula 19.00, Zyxel Networks introduces an important enhancement to its Auto Configuration Recovery feature for switches — focusing on stability and minimizing disruptions to PoE-connected devices. Let’s break down what this feature is, the problem it previously posed, and how it has now been improved. What Is Auto…
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Switch in April 2024 Patch: Support for Multiple NTP Servers
In the latest patch update, Zyxel Networks has expanded NTP server support on managed switches, improving time synchronization reliability and overall system stability. This enhancement allows switches to connect to multiple NTP servers, offering backup options if the primary server becomes unreachable. What’s New?…
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Switch in April 2024 Patch: Default SSH Algorithm Now Uses ECDSA
As part of our continued commitment to improving network security and compatibility, Zyxel Networks has updated the default SSH algorithm used by its switches. Starting with the latest firmware updates, the default SSH algorithm has been changed to ECDSA (Elliptic Curve Digital Signature Algorithm). Why the Change? The…
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Switch in April 2024 Patch: Force Change Password via CLI
To further strengthen device security, Zyxel Networks has extended the "Force Change Password" policy to include the CLI (Command Line Interface) login for supported switch models starting with the April 2024 patch release. Previous Behavior: Web GUI-Only Enforcement Previously, the Force Change Password feature only…
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Will firmware upgrades reset or overwrite switch passwords?
Issue details: After upgrading my switch's firmware, I can no longer log into the WebUI. My previous password is not being accepted, and even the default password (1234) doesn't work. Does the firmware upgrade process overwrite or reset switch passwords? Answer: As per our specifications, upgrading the firmware will not…
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What is the maximum Jumbo Frame MTU size for Zyxel switches?
The maximum Jumbo Frame MTU size varies by specific Zyxel switch model. This feature is enabled by default, requiring no user configuration. For example, the XGS1930-28 model supports up to 9K jumbo frames. Please consult your specific switch model's documentation for exact MTU size specifications. Download Library | Zyxel…
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What are compatible transceivers for my switches?
To determine which transceivers are compatible with your switches, please review the datasheet in the Zyxel download library. Example: The XMG-105 switch datasheet provides detailed information about compatible transceiver models XMG-105_1.pdf