NebulaFlex Switch GS1920 Series - V5.00 Patch 0 Firmware Release

Zyxel_Melen

Zyxel Switch GS1920 Series Release Note 

April 2025

Firmware Version on all models

(Click Hyperlink to download the firmware directly)

Zyxel GS1920-8HPv2 - V5.00(ABKZ.0)C0

Zyxel GS1920-24v2 - V5.00(ABMH.0)C0

Zyxel GS1920-24HPv2 - V5.00(ABMI.0)C0

Zyxel GS1920-48v2 - V5.00(ABMJ.0)C0

Zyxel GS1920-48HPv2 - V5.00(ABMK.0)C0

New Feature and Enhancements

1. [Standalone] Remote management offers support for IPv6. 

2. [Standalone] Support public key authentication for SSH. 

3. [Standalone] The admin account can be changed, providing flexibility and security to the network management system. 

4. [Standalone] The login page will automatically redirect from HTTP to HTTPS to enhance network security. 

5. [Standalone, Nebula] Improve 802.1x and MAC authentication support to identify the Termination-action and port number attribute. 

6. [Standalone] Prevent page refresh when clicking the cancel button in pop-up messages on the dashboard. 

7. [Standalone] Enhanced search bar with improved keyword searching capabilities. 

8. [Standalone] Allow SSH and CLI commands to be combined and display the command result directly 

9. [Standalone] Improve Dashboard's port link speed color display to enhance user experience and intuitiveness. 

10. [Standalone] Clicking on the port icon in the dashboard now redirects to the Port Settings page, providing quicker access to configuration options and improving usability 

11. [Standalone] Enhance security by forcing users to change the password after first login. 

12. [Standalone] Disable Telnet feature by default setting. 

13. [Nebula] Unlock local web GUI for cloud mode. 

14. [Standalone] Web Support Re-Generate SSH Public Key 2048bit for RSA 

15. [Standalone] Expand NTP servers from 1 to 3. 

16. [Standalone] Support password complexity for user/SNMP account and enable mod, with default setting is disable. 

17. [Standalone] Enable password encryption by default to enhance security 

18. [Standalone] Support user IP lockout functionality after a certain number of failed login attempts. 

19. [Standalone] Add new system log for changes in service access control configuration. 

20. [Standalone] Support event log and SNMP trap functionality to generate alerts when system logs reached 90% of thresholds. 

21. [Standalone] Limit login accounts with privileges 0 to 2 only to display basic system information on web GUI. 

22. [Standalone] Device firmware upgrade will check file checksum. 

23. [Standalone] Support interactive password command for masking password in CLI when you creating account 

24. [Nebula] In Cloud mode, SNMP supports the get operation for Zyxel private MIB information, "set" and "trap" are not supported. 

25. [Nebula] Error disable for BPDU Guard auto recovery. 

26. [Nebula] Support Hardware monitor. (CPU/Memory/Temperature/Fan) 

27. [Nebula] Support DHCP relay and added DHCP option 82 for DHCP relay. 

28. [Nebula] Support flow control on the port setting. 

29. [Nebula] Support port Profile. 

30. [Nebula] When configure existence management IP address, a warning message will alert for preventing IP conflict.

Bug Fix

C=Cloud mode, S=Standalone mode

Bug fix	C	S
1. [eITS #240800369] Switch crash when displaying the MAC address.	V	V
2. [eITS #241001395] IPSG with IPv6 has lease time of only 10 seconds.	-	V
3. [eITS #241100262] Cannot clear classifier names longer than 10 characters.	-	V
4. MSTP root guard cannot prevent the RSTP Superior switch from preempting the root.	V	V
5. [eITS #240501702]Fixed device IP address and uplink usage are not displayed correctly on Nebula.	V	-
6. [eITS #240601476] Continuously collecting the tech support file may cause the device to crash.	V	V
7. [eITS #240800283] Fixed an issue where adding a static route with a subnet mask of 255.255.255.255 displayed an“invalid IP subnet mask”message in the web GUI.	-	V
8. [eITS #240801076] Using SNMPwalk to query the Q- Bridge MIB will return incorrect values when voice VLAN is enabled on the device.	V	V
9. [eITS #240900285] Fixed that certification display issue.	-	V
10. [eITS #240801706] Fixed the client could not obtain an IP address if the same IP address was configured in the IPSG static binding table.	V	V
11. [eITS #241001395] IPSG with IPv6 has lease time of only 10 seconds.	-	V
12. [eITS #241100265] Fix user cannot configure classifier when two same sequence policy route already been configured. Bug fix Nebula Standalone	-	V
13. [eITS #241100538] Fix special characters(space,' ,") can be allowed in username to cause configuration error.	-	V
14. When switching from Standard mode with Port- based VLAN type to Networked AV mode, the settings page displayed 802.1Q VLAN, causing confusion.	-	V
15. [eITS #250100026] Fixed abnormal crash issue when continues queries OID 1.0.8802.1.1.2.1.5.4795.1.2.1.1 and its sub-OIDs.	V	V
16. Fixed abnormal crash issue when the switch's VLAN type is set to port-based.	V	V
17. [eITS #250100440]Fixed that truncated DNS packets cannot be process to cause DNS parsing failed.	V	V
18. [eITS #250100337] Fixed DHCPv6 snooping not work due to device cannot process DHCPv6 request with IA_PD+IA_NA option.	V	V
19. [eITS #250201088] When the RADIUS server does not provide a session-timeout attribute, the switch will re- authenticate successfully connected devices every hour by default.	V	V

Please refer to the Download Link for more details.